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 - 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 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 - 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 - TY - GEN A1 - Bien, J. A1 - Helmerich, Rosemarie A1 - Kubiak, Z. A1 - Niederleithinger, Ernst T1 - Ocena Kondycji Starych Mostów Kolejowych Przy Uz.yciu Zaawansowanych Metod - Naukowa Wspólpraca Berlina i Wroclawia / Condition assessment of old railway bridges using advanced methods - scientific cooperation between Berlin and Wroclaw T2 - 160 Lat Polaczenia Kolejowego Wroclaw - Berlin / 160 Jahre Eisenbahnverbindung Berlin-Breslau Konferenz CY - Wroclaw, Poland DA - 2006-12-15 KW - Mosty kolejowe KW - Metody diagnostyczne KW - Metody zaawansowane KW - Historische Eisenbahnlinien KW - Infrastruktur KW - Erhaltung KW - Wissenschaftliche Zusammenarbeit PY - 2006 SN - 83-7085-995-X SP - 183 EP - 199 PB - Oficyna Wydawnicza Politechniki Wroclawskiej CY - Wroclaw AN - OPUS4-14456 LA - pol 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 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 - TY - GEN A1 - Brandes, Klaus A1 - Helmerich, Rosemarie A1 - Herter, Jürgen ED - Meskouris, K. T1 - Zustandsanalyse und Restnutzungsdauer älterer Stahlbrücken T2 - 7. Fachtagung Baustatik - Baupraxis CY - Aachen, Deutschland DA - 1999-03-18 KW - Stahlbrücken KW - Zustandsanalyse KW - Restnutzungsdauer PY - 1999 SN - 90-5809-044-2 VL - 7 SP - 415 EP - 422 PB - Balkema CY - Rotterdam AN - OPUS4-768 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - 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 - GEN A1 - Habel, Wolfgang A1 - Kohlhoff, Harald A1 - Knapp, Jürgen A1 - Helmerich, Rosemarie A1 - Inaudi, D. ED - Casciati, F. T1 - Complex measurement system for long-term monitoring of prestressed railways bridges in the new Lehrter Bahnhof in Berlin T2 - 3rd World Conference on Structural Control (WCSC-3) CY - Como, Italy DA - 2002-04-07 KW - Monitoring KW - Structure behaviour KW - Fibre-optic sensors KW - Data acquisition PY - 2003 SN - 0-471-48980-8 VL - 2 SP - 713 EP - 719 PB - Wiley CY - Chichester AN - OPUS4-2375 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Bridge knowledge management using ontologies N2 - Bridges represent a crucial part of traffic infrastructure networks for both, freight transport and transport of people. None the less, sometimes it is not easy for infrastructure owners to manage or extract data and knowledge of interest about specific bridges from bridge management systems, e.g. along a line. In case of search for a special material parameter or for a recent strengthening measure, the selection of the wanted information may be time consuming. The search process depends on the complexity of the selected issue. The paper presents the applicability of ontologies, a new tool from artificial intelligence transferred to bridge engineering issues. Current modern ontologies consider the rules from the World Wide Web consortium (W3C), use a defined Web Ontology Language (OWL) and the Dublin Core Metadata Initiative (DCMI®) to describe the members of a domain and the relations between them in a machine readable manor. Any information, data as well as text information is broken down to a simple triple (RDF) in a subject- predicate- object relation to organize the link between them. Advantage over any type of data base is processibility due to the use of restrictions and axioms. Visualization plug-ins, as OntoGraph or GraphViz, can visualize the structure of the ontology or parts of it and the described relations. In the recent years, ontology editors like e.g. Protégé, were developed to enable domain experts to structure a specific domain. The editor is still under development. None the less, the study shows exemplarily, how an ontology for riveted steel bridges could consider results from testing in the laboratory and in the field. Besides typical materials, typical damage processes defects and structures, applicable methods are formalized, classified and described. Queries using e.g. DL-Query may address tasks of interest and extract it from the ontology. T2 - IABMAS Conference 2016 CY - Foz do Iguacu, Brazil DA - 26.06.2016 KW - Bridge KW - Bridge testing KW - Defect KW - Semantic knowledge management KW - Ontology PY - 2016 AN - OPUS4-38477 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Active Thermography N2 - Active thermography is a nondestructive testing method for identification of near surface defects and signs of early deterioration. The presentation explains the potential and Limits of the method and the equipment for application to concrete structures. Advanced data analysis can increase the quality of imaging of the measurement. The method is usually applied once for analysis of the current condition. If applied periodically, the method can be used for observation of a deterioration process. T2 - NDT&E Advanced Training Workshop 2016 CY - Berlin, Germany DA - 14.07.2016 KW - Active thermography KW - Nondestructive testing KW - Data analysis KW - Imaging KW - Bond defect detection KW - Defect localization KW - Automated scanning PY - 2016 AN - OPUS4-38478 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie ED - Frangopol, Dan ED - Bittencourt, Tulio N. ED - Beck, André T. T1 - Bridge knowledge management using ontologies N2 - The amount of new knowledge about bridges, materials they are made of, deterioration processes for the different materials, resulting defects, methods for early detection of them and related causes for damage increases day by day. Often the knowledge remains in the heads of ageing specialists leaving the inspection teams or universities. This paper presents a feasibility study about application of a new tool from artificial intelligence to model and organize bridge engineering knowledge from a domain expert´s view. Exemplarily, knowledge and not only data from bridge testing in the field and in the laboratory were formalized for the presentation of the functionality of ontologies. T2 - IABMAS Conference 2016 CY - Foz Do Iguacu, Brasilien DA - 26.06.2016 KW - Ontology KW - riveted steel bridges KW - Bridge knowledge KW - representation of knowledge PY - 2016 SN - 1138028517 SP - 455 EP - 455 PB - CRC PRess Balkema CY - Leiden, Netherlands AN - OPUS4-38494 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie 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 - CONF A1 - Helmerich, Rosemarie ED - Bittencourt, Tulio Nogueira ED - Frangopol, Dan ED - Beck, Andre T1 - Bridge knowledge management using ontologies N2 - The amount of new knowledge about bridges, about the materials they are made of, deterioration processes for the different materials, typical defects, methods for early detection of them and related causes for damage increases day by day. Often the knowledge remains in the heads of ageing specialists leaving the inspection teams or universities. This paper presents a feasibility study about application of a new tool from artificial in-telligence, ontology, for modeling and organizing bridge engineering knowledge from a domain expert´s view. Exemplarily, knowledge and not only data from bridge testing in the field and in the laboratory were formalized for the presentation of the functionality of ontologies. The open source ontology editor Protégé was ap-plied to test the feasibility. T2 - IABMAS Conference 2016 CY - Foz Do Iguacu, Brazil DA - 26.06.2016 KW - Knowledge Representation KW - Ontology KW - Bridge Knowledge KW - Riveted Bridges PY - 2016 SN - ISBN 9781138028517 PB - CRC Press AN - OPUS4-38082 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Bridge knowledge management using ontologies N2 - The amount of new knowledge about bridges, about the materials they are made of, deterioration processes for the different materials, typical defects, methods for early detection of them and related causes for damage increases day by day. Often the knowledge remains in the heads of ageing specialists leaving the inspection teams or universities. This paper presents a feasibility study about application of a new tool from artificial in-telligence, ontology, for modeling and organizing bridge engineering knowledge from a domain expert´s view. Exemplarily, knowledge and not only data from bridge testing in the field and in the laboratory were formalized for the presentation of the functionality of ontologies. The open source ontology editor Protégé was ap-plied to test the feasibility. T2 - IABMAS Conference 2016 CY - Foz Do Iguacu, Brazil DA - 26.06.2016 KW - Riveted steel bridges KW - Ontology KW - Knowledge representation PY - 2016 AN - OPUS4-38083 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 - CONF A1 - Helmerich, Rosemarie T1 - Cast iron arch bridges - part of the world heritage N2 - Cast iron arch bridges were built in the late 18th and early 19th century across Europe. After the famous Iron Bridge in the Ironbridge Gorge in Coalbrookdale in England, being now part of the UNESCO world heritage, many cast iron bridges followed and substituted timber bridges. A series of cast iron bridges has been built in central Europe, in Laasan, Breslau, (now Wrocław), in Berlin, Potsdam, Bad Muskau and Schwerin. The paper gives an overview about the current state of some remaining cast iron arch bridges, typical damage cases, material properties and rehabilitation. Most of the old cast iron arch bridges serve as pedestrian bridges. Some of these bridges have been strengthened to increase the traffic load. Different rehabilitation measures as substitution of parts of the bridges and strengthening using Carbon Reinforced Polymers (CFRP) are discussed. T2 - 8th International Conference on arch bridges CY - Wroclaw, Poland DA - 05.10.2016 KW - Arch bridges KW - Cast iron KW - Materials parameter KW - Rehabilitation PY - 2016 AN - OPUS4-38088 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Helmerich, Rosemarie T1 - Sanierung der Berliner U-Bahnlinie U1 N2 - Brücken zählen einerseits zu den ältesten Zeugnissen der Verkehrsgeschichte und sind andererseits ein wichtiger Bestandteil der Verkehrsinfrastruktur für unsere heutige Gesellschaft. Sie erfüllen eine wichtige Funktion bei Transport von Personen und Gütern und prägen das Stadtbild. Die Berliner Hoch- und Untergrundbahn, eröffnet im Februar 1902 nach 5 1/2 –jähriger Bauzeit, ist in der heutigen Berliner Denkmalliste als Denkmalbereich (Gesamtanlage) geschützt. Bereits seit 1980 waren die historischen Bahnhöfe entlang der Stammstrecke als Baudenkmale gelistet. An der Stahlkonstruktion der Hochbahnviadukte zwischen Halleschem Tor und Prinzenstraße wurden während regulärer Inspektionen in den 1990ziger Jahren Risse dokumentiert. Die Berliner Verkehrsbetriebe (BVG) bezogen die Bundesanstalt für Materialforschung und –prüfung (BAM) sowie Ingenieurbüros in eine Diskussion über die optimale Lösung zur Sanie-rung und zum Erhalt der Hochbahnviadukte ein. Zahlreiche Versuche im Labor und Messungen vor Ort dienten der Optimierung der bevorzugten Sanierungsvariante. Die BVG für eine Lösung mit relativ geringem Eingriff in die Konstruktion. Das äußere Erscheinungsbild der Hochbahnviadukte im Berliner Stadtbild konnte durch die Sanierungsvariante der BVG erhalten werden. KW - U-Bahn KW - Hochbahnviadukt KW - Denkmalschutz KW - Dehnungsmessungen KW - Sanierung KW - Elastisch gebettete Schiene KW - Schotterfreier Oberbau PY - 2016 SN - 1869-7119 IS - 3 SP - 39 EP - 45 PB - Bundesvereinigung Restaurator im Handwerk e.V. CY - Herrstein AN - OPUS4-38089 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Helmerich, Rosemarie T1 - Active thermography N2 - Active thermography is introduced as tool for diagnostics in civil engineering structures. Aside from basic information, examples for applications of active thermography in different types of structures was presented. Active thermography was applied in historic structures to reveal former components or even ancient openings. Other examples present active thermography as a tool for nondestructive detection of debonding in CFRP strengthened structures. The way is explained, how the system was optimized for different materials. T2 - NDT&E Advanced Training Workshop CY - Berlin, Germany DA - 05.07.2017 KW - Active thermography KW - Strengthening KW - Nondestructive testing KW - Civil structures PY - 2017 AN - OPUS4-42920 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 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 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 -