TY - JOUR A1 - Küttenbaum, Stefan A1 - Braml, Thomas A1 - Heinze, Marco A1 - Kainz, Christian A1 - Keuser, Manfred A1 - Kotz, Peter A1 - Lechner, Thomas A1 - Maack, Stefan A1 - Reinke, Klaus‐Dieter A1 - Schulze, Sebastian A1 - Soukup, Alexander A1 - Stettner, Christian A1 - Taffe, Alexander A1 - Wöstmann, Jens T1 - Guideline on NDT‐supported reliability assessment of existing structures ‐ Current developments in Germany JF - ce/papers N2 - Information about an existing structure can be collected at certain costs to evaluate the reliability and condition as realistically as necessary. This information can be relevant or irrelevant, true or biased, precise or imprecise. The incorporation of relevant and quality‐assessed measured information into reliability reassessment offers the chance to extend remaining lifetimes and support decision making about optimal actions or maintenance strategies. This paper shows recent developments in a national research project that aims to produce a guideline on the NDT‐based, structure‐specific modification of partial safety factors. The general methodology, results from recalculations according to the Eurocodes and metrologically solvable testing tasks relevant in the recalculation of the concrete bridges are shown and compared with the non‐destructive testing methods applicable to concrete bridges. A case study is used to demonstrate that as‐built drawings, in this case of the positions of tendons and shear reinforcement, can be verified using the radar method. KW - non‐destructive testing KW - concrete bridges KW - partial safety factor modification KW - Entwicklung Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:523-17444 SN - 2509-7075 VL - 6 IS - 5 SP - 537 EP - 543 ER - TY - JOUR A1 - Küttenbaum, Stefan A1 - Braml, Thomas A1 - Heinze, Marco A1 - Kainz, Christian A1 - Stettner, Christian A1 - Taffe, Alexander T1 - Reliability and partial factor‐based assessment of a highway bridge supported by nondestructive testing JF - Structural Concrete N2 - The preservation of the degrading transport infrastructure is vital, as replacing it is impossible in view of limited budgets and environmental impacts. One component in overcoming this challenge is the evaluation of the reliability and the calculation of the remaining service life of existing structures. These structural reliability reassessments allow for the identification and utilization of load‐bearing capacity reserves. The consideration of actual structural characteristics and environmental conditions, various of which can be gathered by means of numerous measurement and inspection techniques, has the potential for more realistic computation results and therefore more economic decisions about the operation as well as maintenance activities. This article attempts to shed light on the potential of nondestructive testing (NDT) methods for updating the input variables in the ultimate limit states during a recalculation. The approach of the NDT‐supported reliability reassessment is demonstrated using a prestressed concrete bridge emphasizing the bending proof in transversal direction. As a result, the semi‐probabilistic, probabilistic and NDT‐based reassessment results are compared and the effects of NDT‐supported structural analysis on the calculated reliability are highlighted. KW - concrete bridge KW - existing structures KW - NDT KW - probabilistic methods KW - reliability assessment Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:523-22149 SN - 1464-4177 SN - 1751-7648 VL - 26 IS - 5 SP - 5535 EP - 5554 PB - Wiley CY - Weinheim ER -