TY - CONF A1 - Helmerich, Rosemarie T1 - Wrought iron arch bridge: measurements and materials testing T2 - 12th ICMS - Progress in steel and composite structures (Proceedings) N2 - In 1882, the East-West suburban train viaduct was built through Berlin as part of the public traffic solution in the late 19th Century. Today, the only left over iron arch bridge is a pair of two arches Crossing the Spree river in the middle of Berlin. Before dismantling the former parallel two original pairs of iron arches and rebuilding new arches for the high-speed railway line through Berlin in 1997, BAM was involved in an extensive test program of the heritage iron arch structure. Especially the estimation of accumulated damage in critical details and the verification of the old material properties at early stage was important information to the bridge owners. The testing program included two strain and displacement measurement campaigns, non-destructive testing, materials testing and microscale metallographic analysis of critical details. The measured strain cycles were significant lower in number and size than expected. Most of the cycles were compression stress cycles only. The work was planned in Cooperation with the Berlin consultancy Professor Hilbers that was responsible for the design and calculation of the reconstruction measures. Additionally, after calculation of the possible reuse of the old arches, we compared measured data from strain measurements with the results from calculation. The measured data and the calculated data show a good qualitative correlation. T2 - 12th ICMS - Progress in steel and composite structures CY - Wroclaw, Poland DA - 15.06.2011 KW - Iron arch bridge KW - Strain measurement KW - Displacement measurement KW - Tension test KW - Crack propagation test KW - Magnetic powder test PY - 2011 SN - 978-83-7125-202-0 SP - 1 EP - 8 AN - OPUS4-24157 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst A1 - Trela, Christiane A1 - Stoppel, Markus A1 - Bien, J. A1 - Zwolski, J. A1 - Casas, J. A1 - Cruz, P.J.S. A1 - Topczewski, L. A1 - Horrigmoe, G. A1 - Holm, G. A1 - Krüger, M. A1 - Kammel, Ch. A1 - Große, Ch. A1 - Buhr, B. A1 - Aho, T. T1 - WP3-Guideline for inspection and condition assessment T2 - Sustainable Bridges Workshop "Last und Widerstandsbewertung" für Vertreter der Europäischen Eisenbahninfrastrukturabteilungen T2 - Sustainable Bridges Workshop "Last und Widerstandsbewertung" für Vertreter der Europäischen Eisenbahninfrastrukturabteilungen CY - Luleå, Sweden DA - 2007-03-27 PY - 2007 AN - OPUS4-14873 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Niederleithinger, Ernst A1 - Helmerich, Rosemarie A1 - Wiggenhauser, Herbert ED - Cruz, P. ED - Frangopol, D. T1 - Trends in bridge condition assessment using non-destructive testing methods T2 - Bridge maintenance, safety, management, life-cycle performance and cost T2 - Bridge Maintenance, Safety, Management, Life-Cycle Performance and Cost CY - Porto, Portugal DA - 2006-07-16 KW - NDT KW - Condition assessment KW - Automation of measurement KW - Data fusion PY - 2006 SN - 0-415-40315-4 N1 - Serientitel: Balkema proceedings and monographs in engineering, water and earth sciences – Series title: Balkema proceedings and monographs in engineering, water and earth sciences SP - 933 EP - 934 PB - Taylor & Francis CY - London AN - OPUS4-14037 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Traditional repair and strengthening of steel bridges T2 - Sustainable Bridges Workshop "Reparatur und Verstärkung" für Vertreter der Europäischen Eisenbahninfrastrukturabteilungen T2 - Sustainable Bridges Workshop "Reparatur und Verstärkung" für Vertreter der Europäischen Eisenbahninfrastrukturabteilungen CY - Luleå, Sweden DA - 2007-03-27 PY - 2007 AN - OPUS4-14872 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst A1 - Stoppel, Markus A1 - Wiggenhauser, Herbert T1 - The role of advanced non-destructive techniques in condition assessment of existing bridges T2 - 2nd International Conference "Reliability, Safety and Diagnostics of Transport Structures and Means 2005", University of Pardubice T2 - 2nd International Conference "Reliability, Safety and Diagnostics of Transport Structures and Means 2005", University of Pardubice CY - Pardubice, Czech Republic DA - 2005-07-07 PY - 2005 AN - OPUS4-11776 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst A1 - Stoppel, Markus A1 - Wiggenhauser, Herbert ED - Mencik, J. T1 - The role of advanced non-destructive techniques in condition assessment of existing bridges T2 - Proceedings of the 2nd International Conference "Reliability, Safety and Diagnostics of Transport Structures and Means 2005" T2 - 2nd International Conference "Reliability, Safety and Diagnostics of Transport Structures and Means 2005" CY - Parduce, Czech Republic DA - 2005-07-07 KW - Condition assessment KW - Non-destructive testing (NDT) KW - Scanning system KW - Impulse radar KW - Ultrasonic echo KW - Impact echo KW - Active thermography KW - LIBS PY - 2005 SN - 80-7194-769-5 SP - 111 EP - 118 PB - University of Pardubice CY - Pardubice AN - OPUS4-7695 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Täljsten, B. A1 - Helmerich, Rosemarie ED - Cruz, P. ED - Frangopol, D. T1 - Sustainable bridges: A European funded project for higher load and speed on railway bridges - WP6 repair and strengthening T2 - Bridge maintenance, safety, management, life-cycle performance and cost T2 - Bridge Maintenance, Safety, Management, Life-Cycle Performance and Cost CY - Porto, Portugal DA - 2006-07-16 KW - Sustainability KW - Bridges KW - Repair KW - Strengthening KW - Reinforced Concrete KW - Quality control KW - Non-Destructive Testing PY - 2006 SN - 0-415-40315-4 N1 - Serientitel: Balkema proceedings and monographs in engineering, water and earth sciences – Series title: Balkema proceedings and monographs in engineering, water and earth sciences SP - 339-340 (Book)/ 8 pages (CD-ROM) PB - Taylor & Francis CY - London AN - OPUS4-14417 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Niederleithinger, Ernst A1 - Helmerich, Rosemarie T1 - Sustainable Bridges - NDT as a Tool to Assist Railway Bridge Management T2 - NDE Conference on Civil Engineering T2 - NDE Conference on Civil Engineering CY - St. Louis, Missouri, USA DA - 2006-08-14 KW - Railways KW - Bridges KW - NDT KW - Condition assessment PY - 2006 SN - 1-57117-148-7 SP - 196 EP - 204 PB - ASTM CY - St. Louis AN - OPUS4-14436 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Helmerich, Rosemarie A1 - Kohlhoff, Harald A1 - Niemann, Joachim A1 - Werner, Klaus-Dieter T1 - Structural Condition Monitoring of a high-speed train station T2 - Structures for high-speed railway transportation T2 - IABSE symposium 2003 CY - Antwerp, Belgium DA - 2003-08-27 KW - Long term monitoring KW - Vertical displacement KW - Strain measurement KW - Fibre optic sensors KW - Hydrostatic levelling system KW - Online data KW - Web presentation PY - 2003 SN - 3-85748-109-9 N1 - Serientitel: IABSE reports – Series title: IABSE reports IS - 87 SP - 18 EP - 19 PB - IABSE CY - Zürich AN - OPUS4-2729 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Niemann, Joachim A1 - Kohlhoff, Harald A1 - Werner, Klaus-Dieter T1 - Structural Condition Monitoring of a high speed train station T2 - IABSE Symposium T2 - IABSE Symposium CY - Antwerp, Belgium DA - 2003-08-27 PY - 2003 AN - OPUS4-4229 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Kohlhoff, Harald A1 - Niemann, Joachim A1 - Werner, Klaus-Dieter T1 - Structural Condition Monitoring of a High Speed Train Crossing T2 - BRIDMO International Bridge Engineering School T2 - BRIDMO International Bridge Engineering School CY - Guimarães, Portugal DA - 2004-07-19 PY - 2004 AN - OPUS4-3820 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Feistkorn, S. A1 - Taffe, A. A1 - Wilsch, Gerd T1 - Reliability of NDE Data obtained from Concrete bridges N2 - Die Zuverlässigkeit von Daten, die mit zerstörungsfreien Prüfmethoden gewonnen werden sind von vielen Faktoren abhängig, z.B. dem Gerät, dem menschlichen Faktor, dem Materialeinfluss, dem Detail, dem Schadensteil aber auch von der Datenbearbeitung und -interpretation. Der Vortrag stellt den Stand der Möglichkeiten zur Quantifizierung von Ergebnissen der zerstörungsfreien Prüfung dar. N2 - The reliability of data, obtained from nondestructive testing depends on many different factors as e.g. the equipment, the human factor, the influence of material properties, geometrical accessibility of the given detail, the structure of the detail, but also from data acquisition, processing and interpretation. The presentation introduces to current possibilities for the quantification of measurement results received during nondestructive testing. T2 - Symposium on Jointless and Sustainable Bridges CY - Fuzhou, Fujian Province, China DA - 12.05.2016 KW - Probability of Detection KW - Nondestructive testing KW - Nondestructive evaluation KW - Reliability PY - 2016 AN - OPUS4-38081 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Täljsten, B. A1 - Carolin, A. A1 - Helmerich, Rosemarie ED - Jan Bien, ED - Lennart Elfgren, ED - Jan Olofsson, T1 - Rehabilitation of railway bridges T2 - Sustainable Bridges - Assessment for Future Traffic Demands and Longer Lives KW - Railway bridges KW - Repair and strengthening KW - CFRP-strengthening KW - Non-destructive testing PY - 2007 SN - 978-83-7125-161-0 SP - 303 EP - 312 PB - Dolnoslaskie Wydawnictwo Edukacyjne CY - Wroclaw, Poland AN - OPUS4-16094 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Arndt, Ralf A1 - Helmerich, Rosemarie A1 - Maierhofer, Christiane A1 - Röllig, Mathias ED - Forde, M. T1 - Quantitative Pulse-Phase-Thermography for Composites and Concrete Structures T2 - Structural faults & repair 2006 (Proceedings) N2 - The active approach for non-destructive-testing in Civil Engineering (NDT-CE) with infraredthermography (IR), developed at the Federal Institute for Materials Research and Testing (BAM), is described in part one of this contribution. The active IR-approach is based on the principles of impulse- (IT) and pulse-phase-thermography (PPT). The concept is a direct result of a research project at the BAM in cooperation with the Technical University of Berlin (TUB) and was funded by the Deutsche Forschungsgemeinschaft (DFG). In the second part results of the new thermography-scanning system (thermo-scanner) of BAM on debonding of multi-layered structures, especially carbon fibre reinforced plates (CFRP) on concrete are presented. Both, the thermo-scanner developed at BAM, and the investigations carried out, are part of the EU-Project Sustainable Bridges. In the third part of the paper the characteristic frequency of the optimum phase-contrast as a means for the characterization of defects’ depth in CE by means of PPT is introduced. A new quantitative approach is tested and discussed on concrete structures with defects of polystyrene and gas concrete. T2 - 11th International Conference and Exhibiton "Structural Faults and Repair - 2006" CY - Edinburgh, Scotland, UK DA - 2006-06-13 KW - Quantitative NDT KW - Impulse-thermography KW - Pulse-phase-thermography KW - Blind / characteristic frequency KW - Concrete KW - Thermo-scanner KW - CFRP-laminates KW - Debonding KW - Voids PY - 2006 SN - 0-947644-59-8 SP - 1(?) EP - 17(?) PB - Engineering Technics Pr., CY - Edingburgh AN - OPUS4-13794 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maierhofer, Christiane A1 - Arndt, Ralf A1 - Röllig, Mathias A1 - Helmerich, Rosemarie A1 - Walther, A. A1 - Hillemeier, B. A1 - Rieck, C. T1 - Quantification of Voids and Elaminations in Real Concrete and Masonry Structures with Active Thermography: Case Studies T2 - 8th International Conference on Quantitative InfraRed Thermography (QIRT 2006) T2 - 8th International Conference on Quantitative InfraRed Thermography (QIRT 2006) CY - Padova, Italy DA - 2006-06-28 KW - Non-destructive testing in civil engineering KW - Active thermography KW - Pulse-phase thermography KW - Plaster KW - Tiles KW - Asphalt KW - Numerical simulation PY - 2006 UR - http://qirt.gel.ulaval.ca/archives/qirt2006/papers/049.pdf SP - 49, 1 EP - 10 (?) CY - Padova, Italy AN - OPUS4-15710 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Helmerich, Rosemarie A1 - Röllig, Mathias A1 - Schultz, A. A1 - Vielhaber, J. ED - Jan Bien, ED - Lennart Elfgren, ED - Jan Olofsson, T1 - Quality assurance of CRFP-strengthened reinforced concrete structures using automated thermographic investigation T2 - Sustainable Bridges - Assessment for Future Traffic Demands and Longer Lives KW - Quality assurance KW - Bridge repair and strengthening KW - Railway bridges KW - Non-destructive testing KW - Automated scanning PY - 2007 SN - 978-83-7125-161-0 SP - 321 EP - 330 PB - Dolnoslaskie Wydawnictwo Edukacyjne CY - Wroclaw, Poland AN - OPUS4-16091 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Röllig, Mathias A1 - Maierhofer, Christiane A1 - Schultz, A. A1 - Vielhaber, J. T1 - Quality assurance for CFRP-plate-strengthening of RC-beams using impulse-thermography T2 - Sustainable Bridges Workshop für Vertreter der Europäischen Infrastrukturabteilungen T2 - Sustainable Bridges Workshop für Vertreter der Europäischen Infrastrukturabteilungen CY - Luleå, Sweden DA - 2007-03-27 PY - 2007 AN - OPUS4-14871 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Helmerich, Rosemarie A1 - Köpp, Christian A1 - Drdácký, M. A1 - Hennen, C. A1 - Lanza, L. A1 - Golez, M. A1 - Kolymbas, D. A1 - Herle, I. A1 - Virsta, A. A1 - Binda, L. ED - Mufti, A. ED - Banthia, N. T1 - Protection of cultural heritage against flood (CHEF) - A European research project T2 - CSHM-3 - Conservation of heritage structures: using FRM and SHM (Proceedings) T2 - CSHM-3 - Conservation of heritage structures: using FRM and SHM CY - Ottawa, Canada DA - 2010-08-11 KW - Cultural heritage KW - Flood KW - Preventive measures KW - Humidity measurements KW - Knowledge transfer KW - Case study PY - 2010 SN - 978-0-88865-883-8 SP - 361 EP - 370 CY - Vancouver, Canada AN - OPUS4-22352 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Practical applications of recent BAM-research results of NDT and monitoring in civil engineering N2 - Nondestructive testing and monitoring was of mayor interest in BAM-research related to the survey of civil engineering structures during the last two decades. Three case studies about research projects carried out at BAM were presented. All three projects focussed on the survey of parameters and safety related tasks in bridge engineering and inspection. First, the monitoring of the Berlin main station was presented with focus on the sensors developed specifically for this project. The second case study presented and application of guided ultrasonic waves to CFRP-strengthened bridges. The method was sucsessully applied to two of four different strengthening measures carried out min. 10 years ago. The last project presented the feasibility study of a network consisting of simple Bluetooth modules to survey changes in the moisture content in sand and massive concrete. T2 - Workshop CY - University of New South Wales, Sydney, Australia DA - 17.07.2018 KW - Monitoring KW - Wireless sensor network (WSN), KW - NDT KW - Guided waves KW - Bluetooth modules KW - Inspection KW - Civil infrastructure PY - 2018 AN - OPUS4-45657 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Opportunities and limitation of non-destructive testing in condition assessment of bridge structures T2 - Munich bridge assessment conference (Proceedings) T2 - Munich bridge assessment conference (MBAC 2009) CY - Munich, Germany DA - 2009-05-27 KW - Non-destructive testing KW - Condition assessment KW - Data fusion KW - Concrete bridges PY - 2009 SP - 1 EP - 13 AN - OPUS4-19597 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Hong, Shuxian ED - Miyamoto, A. ED - Hakola, I. ED - Yabe, A. ED - Emoto, H. T1 - Nondestructive evaluation and structural health monitoring T2 - CSHM-5 - 5th International workshop on civil structural health monitoring - Structural health monitoring and maintenance of short- & medium-span bridges (Proceedings) T2 - CSHM-5 - 5th International workshop on civil structural health monitoring - Structural health monitoring and maintenance of short- & medium-span bridges CY - Ube, Yamaguchi, Japan DA - 2013-10-24 KW - Non-destructive testing KW - Requirements for NDE KW - Reinforced concrete bridges KW - Corrosion detection KW - Ground penetrating radar KW - Chloride contamination PY - 2013 IS - Keynote paper 4 SP - 49 EP - 56 AN - OPUS4-29510 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Wiggenhauser, Herbert A1 - Helmerich, Rosemarie A1 - Krause, Martin A1 - Mielentz, Frank A1 - Niederleithinger, Ernst A1 - Taffe, Alexander A1 - Wilsch, Gerd ED - Naus, D. T1 - Non-destructive Testing of Nuclear Power Plant Concrete Structures State of the Art Report T2 - BAM research report N2 - Nuclear Power Plants have been in operation for ca. 50 years. Based on this experience, non-destructive testing tasks specific to thick and highly reinforced nuclear containment structures have materialized. The performance based Service life extension of existing NPPs also needs a measurement based decision to support continuing the service of the concrete part of the installations. By nature, concrete is a very durable material and any natural Deterioration processes may take a long time to become critical to the structure. The experience of more than 50 years of service limits the testing tasks to a few ones which are not yet solved. Research in NDT of concrete structures is performed by many research institutions all over the world with different technical and systematic approaches. Results are mainly obtained on laboratory specimens, sometimes additional field studies are reported. This research takes place independently without coordination and as a result, the outcomes mostly lack full comparability. Software for data analysis has become indispensable and very powerful. This part of testing needs more attention when it comes to evaluate test results. Validation of NDE solutions is becoming a critical part in concrete structure testing. Validation is by definition the proof that a customer´s requirements in the test are being met by the testing solution. This includes equipment, personnel qualification and data analysis. In the following tables, the research recommendation Validation is used in the sense, that proof of the performance of existing solutions needs to be adressed. In general, a validation methodology for NDE solutions for concrete testing in itself needs to be researched and established. Comparability of research also needs an accepted and easily accessible reference. From experience, it is almost impossible to manufacture exact copies of test specimens at different locations. Round Robin tests are therefore needed to evaluate the performance of a test. Data evaluation is generally done using dedicated software, sometimes Hardware dependant and not interchangeable between systems. Software is ever more increasingly becoming more powerful and sophisticated. An in-depth evaluation needs to address the comparability and validation of Software used for data analysis and evaluation. The vision of a unified software pool for NDE investigations would undoubtedly support research tremendously. Quantitative NDE is mostly recommended to assess the condition of a structure. However, qualitative data can be very useful, especially for processes which change the material properties or deteriorate the structure (e.g. corrosion of reinforcement). The need for reliable baseline data is a key factor for such monitoring tasks. KW - Nuclear structures KW - Non-destructive testing KW - State of the art KW - Research needs PY - 2013 SP - 1 EP - 120 PB - BAM CY - Berlin AN - OPUS4-51049 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Wiggenhauser, Herbert T1 - Non-destructive testing of concrete structures T2 - ICAMEM2008 - 4th International Conference on Advances in Mechanical Engineering and Mechanics (Proceedings) T2 - 4th International Conference on Advances in Mechanical Engineering and Mechanics (ICAMEM2008) CY - Sousse, Tunisia DA - 2008-12-16 KW - Non-destructive testing KW - Civil engineering KW - Inspection KW - Knowledge transfer KW - Case study PY - 2008 SP - 1 EP - 10 AN - OPUS4-18655 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst ED - Alexander, M. T1 - Non-destructive techniques for the condition assessment of railway bridges T2 - Concrete repair, rehabilitation and retrofitting - proceedings of the International Conference on Concrete Repair, Rehabilitation and Retrofitting T2 - International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR) CY - Cape Town, South Africa DA - 2005-11-21 KW - Sustainable bridges KW - Non-destructive Testing KW - Quality assurance KW - Repair PY - 2005 SN - 0-415-39654-9 N1 - Serientitel: Balkema proceedings and monographs in engineering, water and earth sciences – Series title: Balkema proceedings and monographs in engineering, water and earth sciences SP - 163-165 / 429-435 (CD-ROM) PB - Taylor & Francis CY - London AN - OPUS4-11679 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hong, Shuxian A1 - Helmerich, Rosemarie T1 - Non-destructive corrosion monitoring in concrete with ground penetrating radar T2 - SmartEN Marie Curie ITN Final Conference N2 - In this research, laboratory experiments were carried out to investigate the feasibility of using ground penetrating radar (GPR) for corrosion detection and/or monitoring, and the mechanism of corrosion caused GPR signal changes, taking into account the influence of several parameters: Chloride, rebar size and cover depth. With the understanding of the mechanism, a novel method for detecting reinforcement corrosion in concrete with GPR is proposed, together with a series of signal processing toolkits for corrosion visualization and image comparison. T2 - SmartEN Marie Curie ITN Final Conference CY - Limassol, Cyprus DA - 09.10.2013 KW - Concrete KW - Reinforcement corrosion KW - Nondestructive testing KW - Ground penetration radar KW - Long term corrosion monitoring KW - Periodic monitoring PY - 2013 SP - 1 EP - 6 AN - OPUS4-29580 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Röllig, Mathias A1 - Maierhofer, Christiane A1 - Schultz, A. A1 - Vielhaber, J. A1 - Loehr, M. T1 - Non-destructive CFRP-bond evaluation T2 - 8th International Symposium on Fiber Reinforced Polymer Reinforcement for Concrete Structures (FRPRCS-8) - Proceedings T2 - 8th International Symposium on Fiber Reinforced Polymer Reinforcement for Concrete Structures (FRPRCS-8) CY - Patras, Greece DA - 2007-07-16 KW - Bond behaviour KW - Impulse thermography KW - Effectiveness of repair KW - CFRP-strengthening KW - Large scale testing KW - Validation KW - Acoustic emission KW - Combination of NDT-methods PY - 2007 SP - 106-107 (2-24) CY - Patras, Greece AN - OPUS4-15706 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Niederleithinger, Ernst A1 - Helmerich, Rosemarie A1 - Casas, J. ED - Jan Bien, ED - Lennart Elfgren, ED - Jan Olofsson, T1 - New methods for inspection and condition assessment T2 - Sustainable Bridges - Assessment for Future Traffic Demands and Longer Lives KW - Brücken KW - Inspektion KW - Monitoring KW - Zerstörungsfreie Prüfung KW - Eisenbahn PY - 2007 SN - 978-83-7125-161-0 SP - 83 EP - 91 PB - Dolnoslaskie Wydawnictwo Edukacyjne CY - Wroclaw, Poland AN - OPUS4-16182 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst A1 - Milmann, Boris A1 - Wöstmann, Jens A1 - Röllig, Mathias A1 - Feldmann, Rüdiger A1 - Täljsten, B. ED - Masoud Motavalli, T1 - Near surface mounted CFRP-rods - preparation of reinforcing measures and quality control by means of non-destructive testing T2 - 4th International Conference on FRP Composites in Civil Engineering -CICE2008-, July 22-24, 2008, Zurich, Switzerland (Proceedings) T2 - 4th International Conference on FRP Composites in Civil Engineering (CICE2008) CY - Zurich, Switzerland DA - 2008-07-22 PY - 2008 SN - 978-3-905594-50-8 SP - 1 EP - 6 AN - OPUS4-17747 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Niederleithinger, Ernst A1 - Helmerich, Rosemarie A1 - Streicher, Doreen ED - Vincentsen, L. T1 - NDT Methods for Condition Assessment of Railway Bridges T2 - Proceedings of the International Association for Bridge and Structural Engineering (IABSE) Conference on Operation, Maintenance and Rehabilitation of Large Infrastructure Projects, Bridges and Tunnels T2 - International Association for Bridge and Structural Engineering (IABSE) Conference on Operation, Maintenance and Rehabilitation of Large Infrastructure Projects, Bridges and Tunnels CY - Copenhagen, Denmark DA - 2006-05-15 KW - Condition assessment KW - Non-destructive testing KW - Automation KW - Method combination PY - 2006 SN - 87-91044-03-0 SP - 1(?) PB - IABSE CY - Zürich AN - OPUS4-14038 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst A1 - Wiggenhauser, Herbert A1 - Krause, Martin A1 - Streicher, Doreen T1 - NDT Methods for condition assessment of railway bridges T2 - IABSE 2006 Conference on operations, maintenance and rehabilitation of large infrastructure projects, bridges and tunnels T2 - IABSE 2006 Conference on operations, maintenance and rehabilitation of large infrastructure projects, bridges and tunnels CY - Copenhagen, Denmark DA - 2006-05-15 PY - 2006 AN - OPUS4-14346 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Knapp, Jürgen A1 - Helmerich, Rosemarie A1 - Habel, Wolfgang T1 - Monitoring bridges of the new Lehrter Bahnhof in Berlin by means of long-term stable sensors T2 - Proceedings of the International Conference on Force, Mass, Torque, Hardness and Civil Engineering Metrology in the Age Globalization T2 - International Conference on Force, Mass, Torque, Hardness and Civil Engineering Metrology in the Age Globalization CY - Celle, Germany DA - 2002-09-24 PY - 2002 SN - 3-18-091685-0 SN - 0083-5560 N1 - Serientitel: VDI-Berichte – Series title: VDI-Berichte IS - 1685 SP - 153 EP - 158 PB - VDI-Verl. CY - Düsseldorf AN - OPUS4-1754 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hong, Shuxian A1 - Lai Wai-Lok, Wallace A1 - Helmerich, Rosemarie T1 - Monitoring accelerated corrosion in chloride contaminated concrete with ground penetrating radar T2 - 14th International conference on ground penetrating radar - GPR 2012 (Proceedings) T2 - 14th International conference on ground penetrating radar - GPR 2012 CY - Shanghai, China DA - 2012-06-04 KW - GPR KW - Reinforcing steel KW - Corrosion KW - Chloride PY - 2012 SN - 978-1-4673-2663-6 SP - 1 EP - 6(?) AN - OPUS4-26122 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Werner, Klaus-Dieter A1 - Kohlhoff, Harald A1 - Bartholmai, Matthias A1 - Daum, Werner T1 - Long-Term measurement of vertical displacements at the outer concrete bridges of the Berlin Main Station N2 - The Berlin Main Station was built between 2000 and 2006. At the occasion of the 10th anniversary after the Berlin Main Station was officially opened to train traffic, a view back on eight years of monitoring was given. For the period of the construction with different load cases, the monitoring system was required by the Railway Authorities (Eisenbahnbundesam, EBA) to survey differential vertical displacements between neighbouring supports of the glas roof and the partially prestressed middle bridges. 128 sensors were installed.The data was published in the Internet with access restricted to the BAM scientists and the owner of the station, the German Railways DB AG. T2 - 33rd Danubia- Adria Symposium on Advances in Experimental Mechanics CY - Portorož, Slovenia DA - 20.09.2016 KW - Strain measurements KW - Monitoring KW - Differential displacements KW - Berlin Main Station KW - Hydraulic levelling system KW - Laser-based displacement measuring system PY - 2016 AN - OPUS4-37540 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Werner, Klaus-Dieter A1 - Kohlhoff, Harald A1 - Helmerich, Rosemarie A1 - Daum, Werner ED - Aulova, Alexandra ED - Rogelj Ritonja, A. ED - Emri, I. T1 - Long-Term measurement of vertical displacements at the outer concrete bridges of the Berlin Main Station T2 - 33rd Danubia- Adria Symposium on Advances in Experimental Mechanics - BOOK OF ABSTRACTS N2 - Berlin Main Station is the largest multi-level station in Europe. Its daily passenger number amounts to over 300.000. Structures built for such a large number of people require a high-level safety standard. The station was built on the inner city site of the historic Lehrter Bahnhof. The conditions for building and start of operation were challenging by several reasons. The typical sandy ground with a high level of groundwater makes the permanent static stability of such a complex structure difficult. Several completed, ongoing, and planned construction activities in the immediate vicinity of the station influence the ground settlement of the whole area. On basis of the structural design an impact prediction was calculated, which expected certain vertical displacements particularly between the single columns of the outer concrete bridges of the building. These columns support the glass roof construction, which only allows a defined limit of displacement. In order to avoid damage, a concept for monitoring and adjusting potentially occurring displacements was developed for installation at the outer bridges of the station. T2 - 33rd Danubia- Adria Symposium on Advances in Experimental Mechanics CY - Portorož, Slovenia DA - 20.09.2016 KW - Berlin Main Station KW - Differential displacements KW - Hydraulic levelling system KW - Laser-based displacement measuring system KW - Monitoring KW - Strain measurements PY - 2016 SN - 978-961-94081-0-0 SP - 166 EP - 167 CY - Ljubljana AN - OPUS4-37646 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Ullner, Robert A1 - Helmerich, Rosemarie A1 - Knapp, Jürgen ED - Mencík, J. T1 - Laboratory model test for monitoring the new main railway station of Berlin - The Lehrter Bahnhof T2 - Reliability and diagnostics of transport structures and means 2002 T2 - First International Conference Reliability and Diagnostics of Transport Structures and Means CY - Pardubice, Czech Republic DA - 2002-09-26 PY - 2002 SN - 9788071944645 SP - 1(?) EP - 8(?) PB - Univ. CY - Pardubice AN - OPUS4-1459 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Is data obtained through Non-destructive Testing reliable? N2 - Civil engineers, who are involved in nondestructive testing have to solve an essential task: the transfer of the results of NDT-research into practice. NDT in civil Engineering is a quite new discipline. The results must meet the needs of the infrastructure owners to convince them about the usefulness of NDT. The issue of reliability of the NDT-data was discussed. T2 - Reliability Workshop Polytechnical University HongKong CY - Hong Kong, China DA - 06.04.2016 KW - Civil infrastructure KW - Reliability KW - POD KW - NDT PY - 2016 AN - OPUS4-37545 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Is data obtained through non-destructive testing reliable? N2 - The presentation tries to contribute an answer to the question about reliability of nondestructive evaluation of structures in civil engineering T2 - IABSE Joint summit CY - Helsinki-Barcelona, Finland / Spain DA - 10.03.2016 KW - Nondestructive testing KW - Nondestructive evaluation KW - Reliability KW - Probability of detection PY - 2016 AN - OPUS4-38085 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Helmerich, Rosemarie A1 - Herter, Jürgen A1 - Spieker, N. ED - Casas, J. R. T1 - Interaction between Field Measurements and Laboratory Tests for a Reliable further Use of the Berlin Underground Viaducts T2 - Bridge maintenance, safety and management : proceedings of the First International Conference on Bridge Maintenance, Safety and Management T2 - 1st International Conference on Bridge Maintenance, Safety and Management ; 1st IABMAS '02 CY - Barcelona, Spain DA - 2002-07-14 KW - Fatigue safety KW - Field measurement KW - Laboratory test KW - Fatigue cracking KW - Bridge KW - Silent track KW - Rehabilitation PY - 2002 SN - 84-95999-05-6 SP - 101 EP - 102 PB - International Center for Numerical Methods in Engineering (CIMNE) CY - Barcelona AN - OPUS4-1810 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kammel, C. A1 - Helmerich, Rosemarie ED - Jan Bien, ED - Lennart Elfgren, ED - Jan Olofsson, T1 - Inspection of steel bridges T2 - Sustainable Bridges - Assessment for Future Traffic Demands and Longer Lives KW - Inspection KW - Steel bridges KW - Zerstörungsfreie Prüfung KW - Engineering critical Assessment PY - 2007 SN - 978-83-7125-161-0 SP - 127 EP - 136 PB - Dolnoslaskie Wydawnictwo Edukacyjne CY - Wroclaw, Poland AN - OPUS4-16093 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kowitz, Astrid A1 - Wu, Cheng-Chieh A1 - Hille, Falk A1 - Helmerich, Rosemarie A1 - Kadoke, Daniel A1 - Gründer, Klaus-Peter A1 - Hauser, S. A1 - Schwarzinger, H. ED - Pastramă, Ş. D. ED - Constantinescu, D. M. T1 - Impact on a micro-reinforced UHPC: Experimental studies versus numerical modeling T2 - 35th Danubia-Adria Symposium on Advances in Experimental Mechanics, Extended Abstracts N2 - Within the presented research project, experimental and numerical investigations were performed to develop a thin-shelled, modular, mobile element system made of a micro-reinforced ultra-high-performance ductile concrete (DUCON®). Material parameters were experimentally determined to adapt the material model within the numerical analysis applying the Drucker-Prager relationship. Afterwards, for validation of the numerical models, quasi-static and high-velocity impact tests were performed on plate-like structures. Finally, a suitable geometry of transportable barrier elements will be designed, which provides a maximum of resistance against impact by a minimum of weight and a maximum of mobility. T2 - 35th Danubia-Adria Symposium on Advances in Experimental Mechanics CY - Sinaia, Romania DA - 25.09.2018 KW - E-modulus KW - Impact KW - UHPC KW - DUCON® KW - Quasi-static and dynamic tests KW - Micro-reinforcement KW - Ductility KW - Mobile elements KW - Numerical modeling KW - Stereo photogrammetry KW - Compressive strength PY - 2018 UR - https://www.das2018.ro/ SN - 978-606-23-0874-2 SP - 11 EP - 12 PB - Editura Printech CY - Bucarest, Romania AN - OPUS4-47001 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Feasibility study about monitoring moisture inside massive concrete N2 - Current measurement methods for dertermination of moisture analyse near-surface moisture distribution. During an externally funded research project, microwaves in the Bluetooth(R) frequency band width were utilized for Setting-up a module network. Without additional sensors, the feasibility study confirmed that threedimensional data can collected to obtain a threedimensional data set as basis for the estimation of moisture distribution inside massive building materials. T2 - 2nd International Conference on Ultrahigh Performance Concrete, UHPC2018 CY - Fuzhou, China DA - 07.11.2018 KW - Moisture KW - Bluetooth KW - Microwaves KW - Monitoring PY - 2018 AN - OPUS4-46872 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Moldenhauer, Laura A1 - Helmerich, Rosemarie A1 - Köppe, E. A1 - Wittmann, J. ED - Cosmi, F. T1 - Experimental modeling approach for determining the moisture damping exponent of a Bluetooth Low Energy signal in moist building material T2 - 34th Danube Adria Symposium N2 - The presented development of a damping model is a research component of an experimental feasibility study about moisture in building materials measured with Bluetooth® Low Energy (BLE) signals. This study may be part of a structural health monitoring aiming on early damage detection in the built infrastructure and is increasingly focusing on wireless sensor Network technology. It is investigated, how the Received Signal Strength Indicator (RSSI) of a BLE signal, transmitted from the BLE-module embedded in building materials with changing moisture content is damped. The BLE-module communicates with a mobile Smart Device as tablet or mobile phone via 2.45 GHz-ISMfrequency band where water dipoles start to oscillate. If the BLE-signal transfers through a moist material, the moisture Content influences the RSS-Indicator. The damping model demonstrates this damping effect on RSSI by the abstraction of the reality observed in a real system. T2 - 34th Danube Adria Symposium CY - Trieste, Italy DA - 19.09.2017 KW - Moisture damping coefficient, KW - Buliding materials KW - Bluetooth Low Energy KW - RSSI KW - Experimental approach PY - 2017 SN - 978-88-8303-863-1 DO - https://doi.org/https://www.openstarts.units.it/handle/10077/14834 SP - 141 EP - 142 CY - Trieste, Italy AN - OPUS4-44528 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Moldenhauer, Laura A1 - Helmerich, Rosemarie A1 - Köppe, E. A1 - Wittmann, H.-J. T1 - Experimental modeling approach for determining the moisture damping exponent of a bluetooth low energy signal in moist building material JF - MaterialsToday: Proceedings N2 - The presented development of a damping model is a research component of an experimental feasibility study about moisture in building materials measured with Bluetooth® Low Energy (BLE) signals. This study may be part of a structural health- and long-term monitoring aiming at early damage detection in the built infrastructure and is increasingly focusing on wireless sensor network technology. It is investigated, how the Received Signal Strength Indicator (RSSI) of a BLE signal, transmitted from the BLE-module embedded in building materials with changing moisture content is damped. The aim of the modelling is the derivation of a damping equation for the formal model to determine the moisture damping exponent to finding a correlation. T2 - 34th Danubia Adria Symposium on Advances in Experimental Mechanics CY - Trieste, Italy DA - 19.09.2017 KW - BLE Bluetooth low energy KW - Sensor network KW - RSSI Received Signal Strength Indicator KW - Structural Health Monitoring KW - Moisture measurements PY - 2018 DO - https://doi.org/10.1016/j.matpr.2018.08.124 SN - 2214-7853 VL - 5 IS - Issue 13, Part 2 SP - 26469 EP - 26792 PB - Elsevier Ltd. CY - Radarweg 29, 1043 NX Amsterdam, The Netherlands AN - OPUS4-47171 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Moldenhauer, Laura A1 - Helmerich, Rosemarie A1 - Köppe, Enrico A1 - Haamkens, Frank A1 - Wittmann, Jochen ED - Aulova, Alexandra ED - Rogelj Ritonja, Alenka ED - Emri, Igor T1 - Experimental feasibility study about moisture in building materials measured with bluetooth T2 - The 33rd Danubia Adria Symposium on Advances in experimental mechanics N2 - Structural health monitoring contributes to early damage detection in the built infrastructure. During the last two decades, the sensor networks transferred from wired to wireless sensor networks. Several methods exist to measure moisture in building materials. Most of the introduced commercial humidity measurement methods as provide information about the local or near surface moisture. A feasibility study is presented to demonstrate, how the Received Signal Strength Indicator (RSSI) of a BlueTooth® Low Energy (BLE) signal, transmitted from the BLE-module embedded in building materials with changing moisture content. The BLE-module communicates with a mobile Smart Device as tablet or mobile phone. The RSSI indicates to what extend the received signal strength is changed due to moisture, while the transmitted signal strength remains constant. T2 - The 33rd Danubia Adria Symposium on Advances in experimental mechanics CY - Portoroz, Slovenia DA - 20.09.2016 KW - Bluetooth KW - Moisture KW - Measurement KW - Water dipoles KW - RSSI PY - 2016 SN - 978-961-94081-0-0 SP - 60 EP - 61 PB - SSEM--Slovene Society of Experimental Mechanics CY - Ljubljana, Slovenia AN - OPUS4-38086 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Moldenhauer, Laura A1 - Helmerich, Rosemarie A1 - Köppe, Enrico A1 - Haamkens, Frank A1 - Wittmann, Jochen T1 - Experimental feasibility study about moisture in building materials measured with bluetooth N2 - This feasibility study presents how the Received Signal Strength Indicator (RSSI) of a Bluetooth® Low Energy (BLE) signal, transmitted from the BLE-module embedded in building materials with changing moisture content, is damped. The BLE-module (TRANSMITTER) communicates with a mobile Smart Device as tablet or mobile phone (RECEIVER) [Fig. 1]. The measured RSSI indicates to what extend the received signal strength is changed due to moisture, while the transmitted signal strength remains constant. T2 - Danube Adria Symposium DAS2016 CY - Portoroz, Slovenia DA - 20.09.2016 KW - Bluetooth Low Energy KW - Moisture KW - Experimental study PY - 2016 AN - OPUS4-38522 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Helmerich, Rosemarie ED - Hu, Chang Bin T1 - Engineering Education in Europe T2 - Glimpses of civil engineering education in the world N2 - The book chapter first analyses the history of higher education in Europe. Second step describes the current Bologna process. Finally, the rule of the Bundesanstalt für Materialforschung und -Prüfung (BAM) in supporting PhD-students during their research and preparation of theire theses in cooperation with Universities is described KW - History of education KW - Bologna process KW - BAM PY - 2018 SN - 978-7-114-14938-2 SP - 61 EP - 71 PB - China Communication Press Co., Ltd. CY - Fuzhou, China ET - 1. AN - OPUS4-46871 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Milmann, Boris A1 - Wöstmann, Jens A1 - Feistkorn, S. ED - Barros, J. ED - Sena-Cruz, J. T1 - Durability of CFRP-laminate strengthening T2 - FRPRCS-11 - 11th International symposium on fiber reinforced polymer for reinforced concrete structures (Proceedings) T2 - FRPRCS-11 - 11th International symposium on fiber reinforced polymer for reinforced concrete structures CY - Guimaraes, Portugal DA - 2013-06-26 KW - CFRP-Laminate KW - Debonding KW - Flexural strengthening KW - Bridge KW - NDT KW - Durability test KW - Inspection PY - 2013 SN - 978-972-8692-84-1 SP - 41 EP - 42 (Session 6.5) AN - OPUS4-28859 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Helmerich, Rosemarie A1 - Mielentz, Frank A1 - Milmann, Boris A1 - Adam, Louisa A1 - Villalobos, S. A1 - Guimaraes, M. A1 - Wiggenhauser, Herbert T1 - Detection of cracks perpendicular to the surface using acoustic methods JF - The e-journal of nondestructive testing & ultrasonics N2 - Cracks perpendicular to the surface may be initial indicators for a deterioration process of concrete structures. Moisture penetrates inside the structure and transports adverse chemicals. The paper presents an investigation about the reliability of available commercial non-destructive evaluation techniques to reliably estimate the depth of surface-breaking cracks in reinforced concrete structures. Aim of the study was the investigation of surface-braking cracks under laboratory conditions. Commercial acoustic devices as impact echo equipment, single ultrasonic transducers and arrays were applied even if they have not been developed for this purpose. The commercial software and descriptions for application was followed strictly to compare the function, precision and repeatability of the measurements. Both, perpendicular notches and cracks have been considered. The study was completed with a discussion about reference specimens. The study was the basis for formulation of gaps in research. The Electric Power Research Institute (EPRI) has initiated and funded a Project. T2 - NDT-CE 2015 - International symposium non-destructive testing in civil engineering CY - Berlin, Germany DA - 15.09.2015 KW - Acoustic test KW - Commercial acoustic devices KW - Ultrasonic test KW - Crack depth KW - Concrete specimens PY - 2015 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-345729 UR - https://www.ndt.net/?id=18412 SN - 1435-4934 VL - 20 IS - 11 SP - 1 EP - 9 PB - NDT.net CY - Kirchwald AN - OPUS4-34572 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Helmerich, Rosemarie ED - Boller, C. ED - Chang, F.-K. ED - Fujino, Y. T1 - Construction process monitoring at the new Berlin main station T2 - Encyclopedia of structural health monitoring N2 - The construction process of the New Berlin Main Station, the former Lehrter Bahnhof, has been monitored from the beginning. In this station, the main European east-western railway connection crosses the north–south railway lines. Four east-western bridges, built in the first construction phase, carry the platforms for international lines and suburban train tracks. The outer two bridges carry the supports of the relatively flat glass roof, too. Since the glass roof is very sensitive to vertical displacements, the authorities required a complex monitoring system. This case study describes long-term measurements with classical and enhanced innovative sensors to monitor vertical displacements of neighboring glass roof supports. Additionally, traditional strain gauges were embedded parallel to long-gauge length fiber-optic strain sensors in the near-surface concrete of the partial prestressed bridges to reliably survey possible changes. The measurements on site go along with long-term laboratory tests on prestressed concrete beams. Researchers study load effects and long-term environmental influences on two large-scale model beams, inside and outside the laboratory. The monitoring system has been working stable as an early warning system for any changes of the structural conditions since 2002. All data are available on line for both the project team and the owner. KW - Long term monitoring KW - Vertical displacement KW - Strain measurement KW - Fiber optic sensors KW - Hydrostatic leveling system KW - Online data KW - Web presentation PY - 2009 SN - 978-0-470-05822-0 IS - Chapter 131 SP - 1 EP - 12 PB - John Wiley & Sons AN - OPUS4-20291 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bien, J. A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst A1 - Kubiak, Z. T1 - Condition assessment of old railway bridges, a scientific cooperation between Berlin and Wroclaw T2 - 3rd international congress on construction history (Proceedings) N2 - Two years ago, the East Prussian and the Low-Silesian Railway lines celebrated their 160th anniversaries. The history of both first railway connections in the Eastern railway network development in the whole region in the 19th century is presented together with information about the railway between Berlin and Wroclaw. Special attention is paid to the railway bridges built in this period. The first large iron bridges and typical masonry arch structures are presented. Special attention is paid to masonry arches. The condition appraisal of existing masonry arches requires new developed technical methodologies, effective tools and procedures for the description of the bridges current state and function. Their current technical condition as well as service-ability is described. T2 - 3rd international congress on construction history CY - Cottbus, Germany DA - 2009-05-20 KW - Historische Eisenbahnlinien KW - Infrastruktur KW - Erhaltung KW - Wissenschaftliche Zusammenarbeit PY - 2009 VL - 1 SP - 205 EP - 211 AN - OPUS4-19532 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -