TY - CONF A1 - Friese, Martin A1 - Helmerich, Rosemarie A1 - Effner, Ute A1 - Mielentz, Frank ED - Frangopol, D. ED - Sause, R. ED - Kusko, C. T1 - Capabilities of non-destructive testing of RC structures - quality assurance for crack repair using ultrasonic echo T2 - IABMAS 2010 - Bridge maintenance, safety, management and life-cycle optimization CY - Philadelphia, PA, USA DA - 2010-07-11 KW - Zerstörungsfreie Prüfung KW - Ultraschall KW - Risse KW - Erfolgskontrolle Rissinjektion PY - 2010 SN - 978-0-415-87786-2 SP - 1524 EP - 1531 PB - CRC Press AN - OPUS4-22548 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie A1 - Milmann, Boris ED - Frangopol, D. ED - Sause, R. ED - Kusko, C. T1 - Contribution on non-destructive defect detection to bridge management T2 - IABMAS 2010 - Bridge maintenance, safety, management and life-cycle optimization CY - Philadelphia, PA, USA DA - 2010-07-11 KW - Ultrasonic measurement KW - Transversal waves KW - Bond defect KW - Defect detection KW - Concrete structures KW - Debonded area visualisation PY - 2010 SN - 978-0-415-87786-2 SP - 1 EP - 8(?) PB - CRC Press AN - OPUS4-22680 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 (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 - Arndt, Ralf A1 - Helmerich, Rosemarie A1 - Maierhofer, Christiane A1 - Röllig, Mathias ED - Forde, M. T1 - Quantitative Pulse-Phase-Thermography for Composites and Concrete Structures 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 - 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) 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 - 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) 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 - CONF A1 - Kühn, B. A1 - Sedlacek, G. A1 - Helmerich, Rosemarie A1 - Nussbaumer, A. ED - Gebbeken, N. T1 - Assessment of existing steel structures - A guideline for estimation of the remaining fatigue life T2 - Munich Bridge Assessment Conference (MBAC 2007) CY - Munich DA - 2007-07-09 KW - Existing structures KW - Fatigue life KW - Bridge assessment KW - Non-destructive testing PY - 2007 SP - 1 EP - 15 PB - Institut für Konstruktiven Ingenieurbau CY - Neubiberg AN - OPUS4-15743 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Wrought iron arch bridge: measurements and materials testing 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 - 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 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 - Bien, J. A1 - Helmerich, Rosemarie ED - Jasienko, J. T1 - Theoretical and experimental analysis of historical bridges T2 - SAHC 2012 - 8th International conference on structural analysis of historical constructions CY - Wroclaw, Poland DA - 2012-10-15 KW - Historical bridges KW - Theoretical analysis KW - Experiments KW - Diagnostics PY - 2012 SN - 978-83-7125-216-7 SN - 0860-2395 VL - 1 SP - 45 EP - 63 PB - DWE CY - Wroclaw, Poland AN - OPUS4-26830 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -