TY - JOUR A1 - Stähler, S.C. A1 - Sens-Schönfelder, C. A1 - Niederleithinger, Ernst T1 - Monitoring stress changes in a concrete bridge with coda wave interferometry N2 - Coda wave interferometry is a recent analysis method now widely used in seismology. It uses the increased sensitivity of multiply scattered elastic waves with long travel-times for monitoring weak changes in a medium. While its application for structural monitoring has been shown to work under laboratory conditions, the usability on a real structure with known material changes had yet to be proven. This article presents experiments on a concrete bridge during construction. The results show that small velocity perturbations induced by a changing stress state in the structure can be determined even under adverse conditions. Theoretical estimations based on the stress calculations by the structural engineers are in good agreement with the measured velocity variations. KW - Bridges (structures) KW - Concrete KW - Interferometry KW - Structural acoustics PY - 2011 DO - https://doi.org/10.1121/1.3553226 SN - 0001-4966 SN - 1520-8524 VL - 129 IS - 4 SP - 1945 EP - 1952 PB - AIP CY - Melville, NY, USA AN - OPUS4-28588 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -