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 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 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 - 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 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 - CONF A1 - Hong, Shuxian A1 - Helmerich, Rosemarie T1 - Non-destructive corrosion monitoring in concrete with ground penetrating radar 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 - Wiggenhauser, Herbert T1 - Non-destructive testing of concrete structures 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 - 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 - Wolf, Julia A1 - Mielentz, Frank A1 - Milmann, Boris A1 - Helmerich, Rosemarie A1 - Köpp, Christian A1 - Wiggenhauser, Herbert A1 - Kurz, J.H. A1 - Moryson, R.M. A1 - Samokrutov, A. A1 - Alekhin, S. G. A1 - Alver, Ninel A1 - Sazak, H.Ö. T1 - An ultrasound monitoring system for concrete structures N2 - The research project "Ultrasonic Net for Concrete Monitoring (UNeCOM)" aims at developing a methodology for an embedded ultrasonic network for the condition assessment of infrastructure constructions. Civil engineering structures made of concrete, which are located in tectonically active regions or undergo special loading conditions, may require continuous monitoring. It is important to assess the condition of the building and its stability to recognise and classify the effect of a seismic event or evolving damage at early stages before failure occurs. Embedded ultrasonic sensors offer the possibility to detect changes in the material and degradation mechanisms from inside the structure in areas which are difficult or impossible to inspect otherwise. In contrast to conventional ultrasonic testing methods, where the concrete surfaces are scanned with ultrasound probes, this new approach uses sensors, which are embedded into concrete, eliminating the effect of variable coupling conditions between sensors and concrete. This method allows an integral detection of changes in the concrete structure, for example due to seismic activities, to detect mechanical impacts, as well as degradation of the material due to overloading. Such methods have great relevance especially for the monitoring of constructions like power plants, bridges, offshore structures and other structures with high technical safety requirements. The sensor network can be controlled remotely through the internet which is also being used for data transfer. The embedded sensor network is designed to monitor structural damage and concrete degradation globally with high sensitivity. T2 - Istanbul bridge conference 2014 CY - Istanbul, Turkey DA - 11.08.2014 KW - Ultrasound KW - Concrete KW - Monitoring PY - 2014 SN - 978-605-64131-6-2 SP - Paper 32, 1 EP - 9 AN - OPUS4-32028 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -