TY - GEN A1 - Algernon, Daniel A1 - Schubert, F. A1 - Wiggenhauser, Herbert T1 - Impact-Echo: Experimental and Numerical Study of Acoustic Wave Propagation T2 - NDE Conference on Civil Engineering T2 - NDE Conference on Civil Engineering CY - St. Louis, Missouri, USA DA - 2006-08-14 KW - Impact-Echo KW - Nondestructive Testing KW - Geometry Effects KW - EFIT PY - 2006 SN - 1-57117-148-7 SP - 215 EP - 222 PB - ASTM CY - St. Louis AN - OPUS4-14123 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Algernon, Daniel A1 - Wiggenhauser, Herbert T1 - Impact-Echo Data Analysis Based on the Hilbert-Huang Transform T2 - TRB 86th Annual Meeting, January 21-25, 2007, Washington, D.C., USA T2 - TRB 86th Annual Meeting CY - Washington, D.C., USA DA - 2007-01-21 KW - Impact-Echo KW - Hilbert-Huang KW - Transformation PY - 2007 SP - 1 EP - 14 CY - Washington, D.C., USA AN - OPUS4-17469 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Algernon, Daniel A1 - Wiggenhauser, Herbert T1 - Impact-Echo Signal Processing T2 - NDE Conference on Civil Engineering T2 - NDE Conference on Civil Engineering CY - St. Louis, Missouri, USA DA - 2006-08-14 KW - Impact-Echo KW - Nondestructive Testing KW - Geometry Effects KW - EFIT PY - 2006 SN - 1-57117-148-7 SP - 207 EP - 214 PB - ASTM CY - St. Louis AN - OPUS4-14126 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Algernon, Daniel A1 - Wiggenhauser, Herbert ED - Mazal, P. T1 - Identification of short transient signals within impact-echo data using the Hilbert-Huang-Transform T2 - NDT in progress : IIIrd International Workshop of NDT Experts, October 10 - 12, 2005, Prague, Czech Republic, Proceedings T2 - 3rd International Workshop of NDT Experts CY - Prague, Czech Republic DA - 2005-10-10 KW - Hilbert-Huang Transform KW - Time-Frequency Analysis KW - Impact-Echo KW - Concrete Structures PY - 2005 SN - 80-2142996-8 SP - 9 EP - 17 PB - Univ. of Technology CY - Brno AN - OPUS4-11711 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Algernon, Daniel A1 - Wiggenhauser, Herbert A1 - Abraham, O. T1 - Scanning impact-echo for the investigation of tendon ducts in concrete T2 - Memorandum of the Workshop of COST on NDT Assessment and New Systems in Prestressed Concrete Structures T2 - Workshop of COST on NDT Assessment and New Systems in Prestressed Concrete Structures DA - 2005-09-18 PY - 2005 SP - 55 EP - 62 AN - OPUS4-11051 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Algernon, Daniel A1 - Wiggenhauser, Herbert A1 - Schubert, F. T1 - A new approach for the investigation of geometry effects in impact-echo measurements - experimental results and numerical simulations T2 - 9th European Conference on NDT N2 - Impact-Echo (IE) measurements on concrete structures with compact dimensions are influenced by geometry effects, i.e. reflections especially of the surface waves at the boundaries of the test object, which in fact can lead to misinterpretation of the results. In contrast to the normal reflection arrangement, in which the excitation and the measuring sensor are placed on the same side of the specimen, measurements were carried out in a transmission arrangement, where the impactor and the measuring sensor are placed opposite to each other. This serves to reduce the influence of surface waves, and to investigate further their responsibility for the existence of geometry effects. Results obtained from laboratory specimens with smooth surfaces were still seriously affected by geometry effects. Numerical simulations led to the conclusion that surface waves travel around the edges of the specimen, thus creating geometry effects even on the opposite side. Measurements on a specimen, which was cut out from a bridge structure and had irregular connecting planes between the excitation and the measurement side, proved to be remarkably less affected. In order to analyze and visualize the surface wave propagation an arrangement is used, in which the excitation is fixed at a certain point on one plane of the specimen. A transducer scans all planes of the specimen in phase with the excitation. Time slices show the instantaneous wave field on all planes of the specimen. These are compared with numerical simulations. In particular, it can be proved that surface waves indeed travel around the edges of a specimen with smooth connecting planes, thus creating geometry effects even in the transmission arrangement. T2 - 9th European Conference on NDT CY - Berlin, Germany DA - 2006-09-25 KW - Impact-Echo KW - Nondestructive Testing KW - Geometry Effects KW - EFIT PY - 2006 UR - http://www.ndt.net/article/ecndt2006/doc/P19.pdf SN - 3-931381-86-2 SP - 1 EP - 10 PB - European Federation for Non-Destructive Testing CY - Berlin AN - OPUS4-14434 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Alver, Ninel A1 - Wiggenhauser, Herbert T1 - Modified SIBI application to scanning impact-echo T2 - Structural faults & repair 2008 (Proceedings) T2 - 12th International Conference and Exhibition "Structural Faults & Repair 2008" CY - Edinburgh, Scotland DA - 2008-06-10 KW - Impact echo KW - Zerstörungsfreie Prüfung PY - 2008 SN - 0-947644-63-5 PB - Engineering Technics Pr., CY - Edinburgh AN - OPUS4-34608 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Arndt, Detlef A1 - Borchardt, Kerstin A1 - Croy, F. A1 - Geyer, Emil A1 - Henschen, Joachim A1 - Maierhofer, Christiane A1 - Niedack, Marianne A1 - Rudolphi, Michael A1 - Schaurich, Dieter A1 - Weise, Frank A1 - Wiggenhauser, Herbert T1 - Anwendung u. Kombination zerstörungsfreier Prüfverfahren zur Bestimmung der Mauerwerksfeuchte im Deutschen Dom N2 - Am Deutschen Dom wurden Mikrowellenabsorptionsmessungen, Radar und Infarot- Thermographie als moderne zerstörungsfreie Prüfverfahren der Feuchtemessung in Mauerwerk erprobt. Ergänzende numerische Simulationsrechnungen des gekoppelten Wärme- und Feuchtetransports sollen bei der Auswahl von Trockenlegungskonzepten helfen. T3 - BAM Forschungsberichtreihe - 200 PY - 1994 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-2509 SN - 978-3-89429-423-X SN - 0938-5533 VL - 200 SP - 1 EP - 84 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-250 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Arndt, Ralf A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Weritz, Friederike A1 - Wiggenhauser, Herbert T1 - Structural investigation of concrete and masonry structures behind plaster by means of pulse phase thermography T2 - Proceedings of the 7th International Conference on Quantitative Infrared Thermography (QIRT 2004) T2 - 7th International Conference on Quantitative Infrared Thermography (QIRT 2004) CY - Rhode-St-Genese, Belgien DA - 2004-06-05 KW - Pulse phase thermography KW - Nondestructive testing in civil engineering KW - Plaster KW - Concrete KW - Masonry KW - Delaminations KW - Voids PY - 2004 SP - I.3.1 EP - I.3.6 PB - Karman Institute for Fluid Dynamics CY - Rhode-St-Genese AN - OPUS4-4397 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Arndt, Ralf A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Weritz, Friederike A1 - Wiggenhauser, Herbert T1 - Ortung von Putzablösungen auf Beton und Mauerwerk mit der Puls-Phasen-Thermografie T2 - ZfP in Forschung, Entwicklung und Anwendung - Jahrestagung 2004 N2 - Abstract In the recent years the application of infrared thermography and especially its active approaches lock-in thermography, impulse themography and pulse phase thermography (PPT) has gained more importance for non-destructive testing (NDT). In this paper it is demonstrated that PPT is very well suited for NDT in civil engineering. The method is based on pulse heating of the investigated specimen and on the observation of the cooling down process on its surface with an infrared camera. The transient behaviour is afterwards analysed with Fast Fourier Transformation, enabling the creation of phase and amplitude images with enhanced visualisation of the defects. Results of European and National (i.e. DFG) funded projects are presented, for example the detection of voids and inhomogeneities close to the surface and the localisation of delaminations on plastered concrete and masonry specimen. ZUSAMMENFASSUNG Im Rahmen eines von der Deutschen Forschungsgemeinschaft geförderten Vorhabens zur zerstörungsfreien Prüfung im Bauwesen wird in der Bundesanstalt für Materialforschung und -prüfung (BAM) in Zusammenarbeit mit der Technischen Universität Berlin (TUB) die Puls-Phasen-Thermografie (PPT) weiterentwickelt, bewertet und eingesetzt. Die durch die Impuls-Thermografie (IT) aufgenommenen Daten werden mittels Fast Fourier Transformation (FFT) bearbeitet. Die durch die FFT gewonnenen Phasenbilder reduzieren die Störeinflüsse von Oberflächeninhomogenitäten und ungleichmäßiger Erwärmung. Die dargestellten Ergebnisse zeigen deutlich, dass sich die PPT sehr gut zur zerstörungsfreien Prüfung im Bauwesen eignet. Insbesondere Inhomogenitäten im oberflächennahen Bereich, wie Ablösungen und Hohlstellen hinter Beschichtungen (Putz, CFK-Laminate etc.), aber auch Defekte in größeren Tiefen können zuverlässig geortet und bildgebend dargestellt werden. T2 - Jahrestagung Zerstörungsfreie Materialprüfung 2004 CY - Salzburg, Österreich DA - 2004-05-17 KW - Puls-Phasen-Thermografie KW - Zerstörungsfreie Prüfung im Bauwesen KW - Putz auf Beton und Mauerwerk KW - Ortung von Fehlstellen und Ablösungen PY - 2004 UR - http://www.ndt.net/article/dgzfp04/papers/v89/v89.htm SN - 3-931381-55-2 SP - 1(?) EP - 10(?) PB - DGZfP CY - Berlin AN - OPUS4-5285 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Beutel, R. A1 - Reinhardt, H.-W. A1 - Grosse, C. U. A1 - Glaubitt, A. A1 - Krause, Martin A1 - Maierhofer, Christiane A1 - Algernon, Daniel A1 - Wiggenhauser, Herbert A1 - Schickert, M. T1 - Performance Demonstration of Non-Destructive Testing Methods T2 - 9th European Conference on NDT T2 - 9th European Conference on NDT CY - Berlin, Germany DA - 2006-09-25 KW - NDT-CE KW - Concrete KW - Ultrasonic echo KW - Impact-echo KW - Radar KW - Concrete cover of tendon ducts KW - Thickness measurement KW - Concrete slabs PY - 2006 SN - 3-931381-86-2 SP - 1(?) EP - 9(?) PB - European Federation for Non-Destructive Testing CY - Berlin AN - OPUS4-14382 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Brink, Arne A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert ED - Balageas, D. T1 - Application of quantitative impulse thermography for structural evaluation in civil engineering - comparison of experimental results and numerical simulations T2 - Quantitative infraRed thermography 6 T2 - 6th International Conference on Quantitative InfraRed Thermography ; 6th QIRT '02 CY - Dubrovnik, Croatia DA - 2002-09-24 PY - 2002 SN - 953-631350-2 SP - 35 EP - 40 PB - FSB CY - Zagreb AN - OPUS4-1822 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brink, Arne A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert T1 - Anwendung der Impuls-Thermografie als zerstörungsfreies Prüfverfahren im Bauwesen T2 - Fachtagung Bauwerksdiagnose 2001 - Praktische Anwendungen Zerstörungsfreier Prüfungen T2 - Fachtagung Bauwerksdiagnose - Praktische Anwendungen Zerstörungsfreier Prüfungen CY - Leipzig, Deutschland DA - 2001-10-25 KW - Impuls-Thermografie KW - Thermografie KW - Zerstörungsfreie Prüfung KW - Abkühlungsprozess KW - Bauingenieurwesen KW - Beton KW - Spaltklinker KW - Simulation PY - 2001 N1 - Serientitel: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. – Series title: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. IS - 76-CD PB - DGZfP CY - Berlin AN - OPUS4-1187 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brink, Arne A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert T1 - Auswertungsmethoden der Impuls-Thermografie zur Ortung von Fehlstellen in Betonstrukturen T2 - Thermografie-Kolloquium 2001 T2 - Thermografie-Kolloquium 2001 CY - Stuttgart, Deutschland DA - 2001-09-22 KW - Impuls-Thermografie KW - Thermografie KW - Zerstörungsfreie Prüfung KW - Abkühlvorgang KW - Bauingenieurwesen KW - Beton KW - Simulation PY - 2001 N1 - Serientitel: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. – Series title: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. IS - 77-CD SP - 1 EP - 10(?) PB - DGZfP CY - Berlin AN - OPUS4-1211 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Brink, Arne A1 - Wedler, Gerd A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Weritz, Friederike A1 - Wiggenhauser, Herbert T1 - Active infrared thermography in civil engineering - quantitative analysis by numerical simulation T2 - International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) N2 - The cooling-down process of building structures after heating-up with an external radiation source was analysed to detect voids inside and below the surface. Quantitative results of concrete test specimen containing voids with different sizes at various depths will be presented here. The experimental results were compared to numerical simulations performed with a Finite Difference program developed at BAM. T2 - 6th International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) CY - Berlin, Germany DA - 2003-09-16 KW - Non-destructive testing in civil engineering KW - Acitve thermography KW - Concrete KW - Voids KW - Numerical SImulation KW - Finite differences PY - 2003 UR - http://www.ndt.net/article/ndtce03/papers/p024/p024.htm SN - 3-931381-49-8 SP - 1 EP - 8(?) PB - DGZfP CY - Berlin AN - OPUS4-3403 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Gardei, André A1 - Mittag, Kornelia A1 - Wiggenhauser, Herbert A1 - Ripke, B. A1 - Jovanovic, M. T1 - Inspection of Concrete-Embedded Tracks Process development for the quality assurance of concrete-embedded tracks using non-destructive testing methods T2 - International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) N2 - In the framework of the feasibility study "Inspection of Concrete-Embedded Tracks" between BAM and Deutscher Bahn AG, application and further development of NDT- measurements for the constructional conditions of the concrete-embedded tracks are investigated. After first test series on the rail track [Ref 1] and in further laboratory investigations on test specimen [Ref 2], result of the three selected non-destructive methods impact- echo, ultrasonic-echo and impulse radar will be presented. T2 - 6th International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) CY - Berlin, Germany DA - 2003-09-16 PY - 2003 UR - http://www.ndt.net/article/ndtce03/papers/v086/v086.htm SN - 3-931381-49-8 PB - DGZfP CY - Berlin AN - OPUS4-3975 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Große, C. A1 - Wiggenhauser, Herbert A1 - Algernon, Daniel A1 - Schubert, F. A1 - Beutel, R. T1 - Impact-Echo - Stand der Technik und Anwendungen des Verfahrens T2 - Tagungsband der DAfStb-Fachtagung 2005 T2 - DAfStb-Fachtagung 2005 "Zerstörungsfreie Prüfverfahren und Bauwerksdiagnose im Betonbau" CY - Berlin, Deutschland DA - 2005-03-10 PY - 2005 SP - 1 EP - 8 PB - BAM CY - Berlin AN - OPUS4-7366 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Gucunski, N. A1 - Imani, A. A1 - Romero, F. A1 - Nazarian, S. A1 - Yuan, D. A1 - Wiggenhauser, Herbert A1 - Shokouhi, Parisa A1 - Taffe, Alexander A1 - Kutrubes, D. T1 - Nondestructive testing to identify concrete bridge deck deterioration T2 - SHRP 2 Report S2-R06A-RR-1 N2 - This work was sponsored by the Federal Highway Administration in cooperation with the American Association of State Highway and Transportation Officials. It was conducted in the second Strategic Highway Research Program (SHRP 2), which is administered by the Transportation Research Board of the National Academies. The project was managed by Monica Starnes, Senior Program Officer for SHRP 2 Renewal. The research reported herein was performed by the Center for Advanced Infrastructure and Transportation (CAIT) at Rutgers University (RU); the Center for Transportation Infrastructure Systems (CTIS) at The University of Texas at El Paso (UTEP); the Federal Institute for Materials Research and Testing (BAM), Germany; and Radar Systems International, Inc. (RSI). Rutgers University was the coordinator and contractor for this project. Dr. Nenad Gucunski, professor and chair of Civil and Environmental Engineering and director of CAIT’s Infrastructure Condition Monitoring Program at RU, was the principal investigator. The other authors of this report are Dr. Soheil Nazarian, professor of Civil Engineering and director of CTIS at UTEP; Dr. Deren Yuan, research associate at CTIS at UTEP; Dr. Herbert Wiggenhauser, head of Non-Destructive Testing (NDT) in Civil Engineering at BAM; Dr. Alexander Taffe, leader of Combination and Automation of NDT of Buildings at BAM; Dr. Parisa Shokouhi, Alexander von Humboldt Research Fellow, hosted by BAM; and Doria Kutrubes, president of RSI. Arezoo Imani and Touraj Tayebi, graduate research assistants at RU, helped conduct the validation testing, data analysis, and web manual content preparation. Hoda Azari, a graduate research assistant, and Dr. Manuel Celaya, a research engineer at UTEP, assisted in the validation study as well. Hooman Parvardeh, research assistant at RU, helped build the reference database and develop the framework for the web manual, while Erica Erlanger, a research staff member at RU, edited the manuscript. Their contributions are gratefully acknowledged. The research team also gratefully acknowledges contributions of the participants from industry and academia in the validation testing. The participants include NDT Corporation; Germann Instruments; Olson Engineering; Dr. Ralf Arndt, National Research Council associate at FHWA Turner–Fairbank Highway Research Center; Ingegneria Dei Sistemi S.p.A. (IDS), Italy; 3D-RADAR, Norway; Dr. John Popovics, University of Illinois at Urbana-Champaign; Dr. Jinying Zhu, The University of Texas at Austin; Rutgers University—Center for Advanced Infrastructure and Transportation; and The University of Texas at El Paso—Center for Transportation Infrastructure Systems. The contributions of these participants were critical for the evaluation and grading of the performance of NDT technologies. PY - 2013 UR - http://onlinepubs.trb.org/onlinepubs/shrp2/SHRP2_S2-R06A-RR-1.pdf SN - 978-0-309-12933-6 SP - 1 EP - 96 PB - Transportation Research Board, Washington D.C. AN - OPUS4-34732 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 - CONF A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst A1 - Algernon, Daniel A1 - Streicher, Doreen A1 - Wiggenhauser, Herbert T1 - Bridge inspection and condition assessment in Europe T2 - Proceedings of the TRB 87th Annual Meeting T2 - TRB 87th annual meeting CY - Washington, D.C., USA DA - 2008-01-13 KW - Construction KW - Environment and Energy PY - 2008 IS - CD-ROM (Paper 08-1450 / Session 568) SP - 1 EP - 13 PB - TRB CY - Washington, DC AN - OPUS4-16651 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -