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 - JOUR A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert T1 - Quantitative Impulse-Thermography as Non-Destructive Testing Method in Civil Engineering - Experimental Results and Numerical Simulations N2 - Impulse-thermography is an active method for quantitative investigation of the near surface region of various structures which has recently been applied to civil engineering. It is well suited for the detection of voids and honeycombing in concrete up to concrete covers of 10 cm and more. For quantitative analysis, a computer program for numerical simulation of the heating up and cooling down processes was developed based on Finite Differences. With this program parameter studies have been performed for investigating the influence of environmental conditions, material parameters and geometry on the thermal behaviour. The comparison between experimental and simulated results enables the Inverse Solution. KW - Impulse-thermography KW - Numerical simulation KW - Non-destructive testing KW - Concrete KW - Civil engineering PY - 2005 SN - 0950-0618 VL - 19 IS - 10 SP - 731 EP - 737 PB - Elsevier CY - Oxford AN - OPUS4-3162 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert A1 - Hillemeier, B. A1 - Rieck, C. T1 - Struktur- und Feuchteuntersuchung in Betonstrukturen mit der Impuls-Thermografie KW - Zerstörungsfreie Prüfung im Bauwesen KW - Impuls-Thermografie KW - Beton KW - Hohlstellen KW - Kiesnester KW - Simulation PY - 2003 UR - http://www3.interscience.wiley.com/cgi-bin/jtoc/60500216/2005 SN - 0171-5445 SN - 1437-0980 VL - 25 IS - 1 SP - 22 EP - 26 PB - Ernst CY - Berlin AN - OPUS4-3164 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brink, Arne T1 - Application of quantitative impulse thermography for structural evaluation in civil engineering - comparison of experimental results and numerical simulations T2 - QIRT 2002 CY - Dubrovnik, Croatia DA - 2002-09-24 PY - 2002 AN - OPUS4-3307 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brink, Arne T1 - Anwendung der Impuls-Thermografie als zerstörungsfreies Prüfverfahren im Bauwesen N2 - Ziel der Untersuchungen ist die Weiterentwicklung der Impuls-Thermografie als quantitatives zerstörungsfreies Prüfverfahren zur Ortung oberflächennaher Inhomogenitäten in Bauteilen und Bauwerken. Zur Zeit werden Putzablösungen auf Mauerwerk bzw. Beton, Hohlstellen und Kiesnester in Beton, Ablösungen und Hohlstellen bei Spaltklinkern im Dickbettmörtel auf Beton, Verbundprobleme von CFK-Laminaten auf Beton sowie Ablösungen von Bitumen-Abdichtungsbahnen auf Stahl untersucht. T2 - Fachtagung (BAUFACH) "Bauwerksdiagnose - Praktische Anwendungen zerstörungsfreier Prüfungen" CY - Leipzig, Germany DA - 25.10.2001 KW - Mauerwerk KW - Hohlstellen KW - CFK-Laminate PY - 2001 AN - OPUS4-3300 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brink, Arne T1 - Auswertungsmethoden der Impuls-Thermografie zur Ortung von Fehlstellen in Betonstrukturen T2 - Thermografie-Kolloquium 2001 CY - Stuttgart, Germany DA - 2001-09-22 PY - 2001 AN - OPUS4-3332 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 - JOUR A1 - Maierhofer, Christiane A1 - Wiggenhauser, Herbert A1 - Brink, Arne A1 - Röllig, Mathias T1 - Quantitative numerical analysis of transient IR-experiments on buildings N2 - Impulse-thermography has been established as a fast and reliable tool in many areas of non-destructive testing. In recent years several investigations have been done to apply active thermography to civil engineering. For quantitative investigations in this area of application, finite difference calculations have been performed for systematic studies on the influence of environmental conditions, heating power and time, defect depth and size and thermal properties of the bulk material (concrete). The comparison of simulated and experimental data enables the quantitative analysis of defects. T2 - 7th International Workshop on Advanced Infrared Technology and Applications ; 7th AITA Conference CY - Pisa, Italy DA - 2003-09-09 KW - Impulse-thermography KW - Numerical simulation KW - Non-destructive testing KW - Concrete KW - Civil engineering PY - 2004 DO - https://doi.org/10.1016/j.infrared.2004.03.022 SN - 1350-4495 VL - 46 IS - 1-2 SP - 173 EP - 180 PB - Pergamon Press CY - Oxford AN - OPUS4-4984 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brink, Arne T1 - Quantitative Impulse-Thermography as Non-Destructive Testing Method in Civil Engineering - Experimental Results and Numerical Simulations T2 - Structural Faults and Repair 2003 CY - London, England DA - 2003-07-01 PY - 2003 AN - OPUS4-3839 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brink, Arne T1 - Active Infrared Thermography in Civil Engineering - Quantitative Analysis by Numerical Simulation T2 - NDT-CE 2003, International Symposium Non-Destructive Testing in Civil Engineering CY - Berlin, Germany DA - 2003-09-16 PY - 2003 AN - OPUS4-3825 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert T1 - Detection of shallow voids in concrete structures with impulse thermography and radar N2 - New thermography systems enable the application of active investigation techniques, i.e. the observation of the cooling down process after heating the surface of a structure under investigation. Defects like voids in concrete having a different thermal diffusivity in comparison to the bulk material are visualised by different surface temperatures. The differences between temperature transient curves above sound regions and above inhomogeneities are expected to include information about the defect parameters. Experimental investigations with impulse thermography and radar on a concrete test specimen containing voids were analysed. Radar was used to determine the depth of the voids. The influence of size and depth of the voids on the temperature transient curves was studied for different heating times. The transient curves were also fitted with a simple semi-empirical model. KW - Impulse thermography KW - Radar KW - Non-destructive testing KW - Concrete KW - Civil engineering PY - 2003 SN - 0963-8695 VL - 36 IS - 4 SP - 257 EP - 263 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-11867 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -