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 U6 - http://nbn-resolving.de/urn/resolver.pl?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 - GEN A1 - Krause, Martin A1 - Bärmann, R. A1 - Frielinghaus, R. A1 - Kreschmar, F. A1 - Krogge, O. A1 - Langenberg, K. A1 - Maierhofer, Christiane A1 - Müller, W. A1 - Neisecke, J. A1 - Schickert, M. A1 - Schmitz, V. A1 - Wiggenhauser, Herbert A1 - Wollbold, F. ED - Schickert, G. T1 - Comparison of pulse-echo-methods for testing concrete T2 - International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) CY - Berlin, Germany DA - 1995-09-26 KW - Beton KW - Radar KW - Aufprallecho KW - Ultraschall KW - Prüfung PY - 1995 SN - 3-931381-02-1 N1 - Serientitel: BB / DGZfP – Series title: BB / DGZfP SP - 281 EP - 295 PB - DGZfP, Dt. Ges. für Zerstörungsfreie Prüfung e.V. CY - Berlin AN - OPUS4-593 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krause, Martin A1 - Maierhofer, Christiane A1 - Ewert, Uwe T1 - Prüfung von bewehrtem Beton mit Radar, Ultraschall-Impulsecho und Durchstrahlverfahren (Erweitertes Abstract) T2 - Erstes franz.-dt. Seminar für zerstörungsfreie Prüfung CY - Metz, Frankreich DA - 1995-10-12 KW - Beton, bewehrt KW - Prüfung KW - Radar KW - Ultraschall-Impulsecho KW - Durchstrahlungsverfahren PY - 1995 CY - Metz AN - OPUS4-594 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Rösch, A. A1 - Hillemeier, B. A1 - Porzig, Ekkehard A1 - Krause, Martin A1 - Maierhofer, Christiane ED - Schickert, G. T1 - Air voids, poor compaction and areas of low concrete strength detection in concrete by pulse velocity measurements T2 - International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) CY - Berlin, Germany DA - 1995-09-26 KW - Beton, Stabilität KW - Ultraschall KW - Fehlstelle KW - Hohlraum PY - 1995 SN - 3-931381-02-1 N1 - Serientitel: BB / DGZfP – Series title: BB / DGZfP VL - 2 SP - 895 EP - 902 PB - DGZfP, Dt. Ges. für Zerstörungsfreie Prüfung e.V. CY - Berlin AN - OPUS4-595 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 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 - 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 - 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 - Maierhofer, Christiane A1 - Wendrich, Astrid A1 - Köpp, Christian T1 - On-site investigation techniques for the structural evaluation of historic masonry buildings (EC-Project in the Environment and Sustainable Development Programme (EESD) T2 - 6th International Masonry Conference CY - London, England, UK DA - 2002-11-04 PY - 2002 N1 - Geburtsname von Wendrich, Astrid: Ziebolz, A. - Birth name of Wendrich, Astrid: Ziebolz, A. VL - 6 SP - 1(?) EP - 4(?) AN - OPUS4-1823 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert T1 - Anwendung der Impuls-Thermografie als quantitatives zerstörungsfreies Prüfverfahren im Bauwesen N2 - Zusammenfassung Die Impuls-Thermografie ist eine aktive Methode zur Strukturuntersuchung von Bauteilen. Im Rahmen eines von der DFG geförderten Projektes wird in Kooperation mit der TU Berlin an der Bundesanstalt für Materialforschung und -prüfung zur Zeit die mögliche Anwendung der Impuls-Thermografie als zerstörungsfreies Prüfverfahren im Bauwesen untersucht. Die Impuls-Thermografie soll zur Ortung von oberflächennahen Inhomogenitäten, bei denen es sich im Normalfall um Fehlstellen handelt, in typischen Bauteilen verwendet werden und nach Möglichkeit die Geometrie- sowie die Materialparameter der Inhomogenitäten quantitativ bestimmt werden. Messungen werden derart durchgeführt, dass Oberflächen mit einem geeigneten Heizstrahler erwärmt, die anschließenden Abkühlungsprozesse mit einer Infrarot-Kamera betrachtet und thermische Bilddaten (Thermogramme) aufgezeichnet werden. Der Hauptansatzpunkt für die quantitative Auswertung der Messdaten ist die Betrachtung von Temperatur-Zeit-Kurven (Transienten) des Abkühlungsprozesses über fehlerfreien und fehlerhaften Bereichen des Probekörpers. Zusätzlich werden auf Basis der Finiten-Differenzen-Methode numerische Simulationen durchgeführt. Quantitative Ergebnisse werden sowohl durch den Vergleich der experimentellen Daten mit den Simulationsrechnungen als auch durch eine Anpassung analytischer Funktionen an die Transienten erzielt. T2 - Jahrestagung Zerstörungsfreie Materialprüfung 2002 CY - Weimar, Deutschland DA - 2002-05-06 KW - Zerstörungsfreie Prüfung im Bauwesen (ZfPBau) KW - Impuls-Thermografie KW - Hohlstellen KW - Schichtablösungen KW - Beton PY - 2002 UR - http://www.ndt.net/article/dgzfp02/papers/v45/v45.htm SN - 3-931381-39-0 N1 - Serientitel: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. – Series title: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. IS - 80-CD PB - DGZfP CY - Berlin AN - OPUS4-1824 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maierhofer, Christiane A1 - Kind, Thomas ED - Koppenjan, S. K. T1 - Application of impulse radar for non-destructive investigation of concrete structures N2 - The application of impulse radar for structural investigation of concrete elements has been increased during the last years related to technical developments, i. e. of high frequency antennas. In this paper, case studies will be presented related to the location of reinforcing bars, tendon ducts and repaired concrete areas in concrete bridges, anchors and dowels in concrete highways and delaminations of layered structures as they are used for non-ballasted railway tracks. It is shown that impulse radar can be applied in case of regular inspection and for searching the cause of damages but also for quality assessment in civil engineering. T2 - 9th GPR 2002 ; 9th International Conference on Ground Penetrating Radar CY - Santa Barbara, CA, USA DA - 2002-04-29 KW - Non-destructive testing KW - Radar KW - Polarisation KW - Civil engineering KW - Concrete KW - Reinforcement KW - Voids KW - Quality assurance PY - 2002 UR - http://cat.inist.fr/?aModele=afficheN&cpsidt=14182375 SN - 0-8194-4522-3 SN - 1605-7422 N1 - Serientitel: SPIE proceedings series – Series title: SPIE proceedings series IS - 4758 SP - 382 EP - 387 PB - SPIE, the International Society for Optical Engineering CY - Bellingham, Wash. AN - OPUS4-1825 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kind, Thomas A1 - Krause, Ingo A1 - Maierhofer, Christiane T1 - Development of an Utility Finding Impulse Radar T2 - German Radar Symposium (GRS 2002) CY - Bonn, Germany DA - 2002-09-03 KW - Ground penetration radar KW - Utility finding KW - Antenna KW - Impulse radar PY - 2002 SP - 341 EP - 344 AN - OPUS4-1826 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert A1 - Hillemeier, B. A1 - Rieck, C. ED - Kupfer, K. ED - Trinks, E. T1 - Untersuchung des Einflusses von Feuchtigkeit auf die Ortung von Hohlstellen in Betonstrukturen mit der Impuls-Thermografie T2 - 11. Feuchtetag CY - Weimar, Deutschland DA - 2002-09-18 KW - Impuls-Thermografie KW - Thermografie KW - Zerstörungsfreie Prüfung im Bauwesen KW - Simulation KW - Hohlstellen KW - Kiesnester KW - Feuchtigkeit KW - Beton PY - 2002 SP - 47 EP - 58 PB - MFPA an der Bauhaus-Univ. CY - Weimar AN - OPUS4-1827 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert T1 - Impulse Thermography for locating voids and honeycombing in concrete structures supported by numerical simulations T2 - 11. Bauklimatisches Symposium ; 11th Symposium of Building Physics CY - Dresden, Germany DA - 2002-09-26 PY - 2002 SP - 242 EP - 252 PB - TU CY - Dresden AN - OPUS4-1828 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert ED - Binda, L. T1 - Transient thermography for non-destructive investigation of building structures in the near surface region T2 - RILEM TC 177-MDT Workshop on On-Site Control and Non-Destructive Evaluation of Masonry Structures CY - Mantova, Italy DA - 2001-11-12 KW - Non-destructive testing KW - Masonry KW - Concrete KW - Impulse thermography KW - Plaster KW - Laminates PY - 2003 SN - 2-912143-34-9 N1 - Serientitel: RILEM proceedings – Series title: RILEM proceedings IS - 26 SP - 251 EP - 261 PB - RILEM Publications CY - Bagneux, France AN - OPUS4-1829 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maierhofer, Christiane A1 - Kind, Thomas ED - Binda, L. T1 - Application of georadar for the determination of moisture content and distribution in masonry T2 - RILEM TC 177-MDT Workshop on On-Site Control and Non-Destructive Evaluation of Masonry Structures CY - Mantova, Italy DA - 2001-11-13 PY - 2003 SN - 2-912143-34-9 N1 - Serientitel: RILEM proceedings – Series title: RILEM proceedings IS - 26 SP - 227 EP - 238 PB - RILEM Publications CY - Bagneux, France AN - OPUS4-1830 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maierhofer, Christiane A1 - Wöstmann, Jens A1 - Hennen, C. T1 - Non-destructive investigation of complex historic masonry structures with impulse radar N2 - For the investigation of the complex inner structure of historic buildings, the application of radar has been increased during the last ten years. Although historic masonry in general is very inhomogeneous and although in some cases high absorption occurs due to enhanced moisture, radar has been successfully applied to get information on geometry, position of inclusions and about kind and size of existing damages. In this paper case studies will be presented concerning the localisation of metallic inclusions and the investigations of the structure of an exterior wall with a multiple leaf structure. 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 - Radar KW - Masonry KW - Cultural Heritage PY - 2003 UR - http://www.ndt.net/article/ndtce03/papers/p063/p063.htm SN - 3-931381-49-8 PB - DGZfP CY - Berlin AN - OPUS4-3156 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maierhofer, Christiane A1 - Wöstmann, Jens A1 - Brink, Arne A1 - Röllig, Mathias T1 - Ortung von Hohlstellen und Ablösungen in Betonkonstruktionen mit Radar und Impuls-Thermografie T2 - 21. GESA-Symposium 2003 CY - Braunschweig, Deutschland DA - 2003-06-12 KW - Zerstörungsfreie Prüfung im Bauwesen KW - Radar KW - Impuls-Thermografie KW - Beton KW - Hohlstellen KW - Ablösungen PY - 2003 SN - 3-18-091757-1 SN - 0083-5560 N1 - Serientitel: VDI-Berichte – Series title: VDI-Berichte IS - 1757 SP - 281 EP - 292 PB - VDI-Verl. CY - Düsseldorf AN - OPUS4-3157 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maierhofer, Christiane A1 - Arndt, Ralf A1 - Röllig, Mathias A1 - Weritz, Friederike A1 - Wiggenhauser, Herbert T1 - Untersuchung von Betonstrukturen mit der Puls-Phasen-Thermografie T2 - Thermografie-Kolloquium 2003 CY - Stuttgart, Deutschland DA - 2003-09-25 KW - Zerstörungsfreie Prüfung im Bauwesen KW - Impuls-Thermografie KW - Puls-Phasen Thermografie KW - Beton KW - Spaltklinker KW - Hohlstellen KW - Ablösungen PY - 2003 UR - http://www.ndt.net/search/docs.php3?date=2006-01&issue=1 SN - 3-931381-51-X N1 - Serientitel: DGZfP-Berichtsband – Series title: DGZfP-Berichtsband IS - 86-CD SP - 53 EP - 62 PB - DGZfP CY - Berlin AN - OPUS4-3158 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Mayer, K. A1 - Zimmer, A. A1 - Langenberg, K. J. A1 - Kohl, Christoph A1 - Maierhofer, Christiane T1 - Non-Destructive Evaluation of Embedded Structures in Concrete - Modeling and Imaging N2 - We concentrate on appropriate algorithmic processing of microwave Ground Penetrating Radar (GPR) data obtained from concrete specimens containing tendon ducts below steel reinforcement bars either via simulations or via experiments. The goal is to understand the physical phenomena of electromagnetic wave propagation and scattering in detail in order to optimize imaging algorithms like SAFT (Synthetic Aperture Focusing Technique as the NDT version of SAR) in its 3D diffraction tomographic FT-SAFT formulation (Fourier-Transform-SAFT). Therefore we start with the simulation of a "simple" specimen and switch to a more realistic one in order to check whether simulation and experiment can give comparable results. Basically, this could be confirmed, but, nevertheless, various parametric studies will still have to be performed in the future. 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 - Radar KW - Modelling KW - SAFT KW - SAR PY - 2003 UR - http://www.ndt.net/article/ndtce03/papers/v022/v022.htm SN - 3-931381-49-8 VL - 85-CD PB - DGZfP CY - Berlin AN - OPUS4-3159 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Maierhofer, Christiane A1 - Ziebolz, A. A1 - Köpp, Christian T1 - ONSITEFORMASONRY - A European Research Project: On-site investigation techniques for the structural evaluation of historic masonry N2 - ONSITEFORMASONRY is a research project funded by the European Commission under the 5. Framework Programme 1998-2002 in the Thematic Programme: Energy, Environment and Sustainable Development and the Key Action: The City of Tomorrow and Cultural Heritage. The main objective of the project is the development and improvement of methodologies for the evaluation of the structure of historic masonry Cultural Heritages. For effective restoration and conservation of historic buildings, a detailed assessment of the structural safety and physical damages of the masonry structure is required. Therefore, typical masonry damages and the most frequent pathologies in each region have been identified and summarised in a catalogue of problems and damages. Selected non-destructive (NDT) and minor-destructive (MDT) techniques are performed by the partners including the development of software packages for fast and automated data analysis. The strategy for an effective and useful combination of different NDT and MDT methods will be worked out considering the results of case studies and taking into account the experiences of the consortium members. Recommendations and guidelines for the application of the integrated methodologies will be developed in close co-operation with end-users. 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 - Radar KW - Ultrasonics KW - Sonics KW - Microseismic KW - Masonry KW - Cultural heritage PY - 2003 UR - http://www.ndt.net/article/ndtce03/papers/v070/v070.htm SN - 3-931381-49-8 PB - DGZfP CY - Berlin AN - OPUS4-3161 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert T1 - Impulse Thermography for locating voids and honeycombing in concrete structures supported by numerical simulations T2 - 11th Symposium of Building Physics 2002 CY - Dresden, Germany DA - 2002-09-26 PY - 2002 AN - OPUS4-3887 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -