TY - JOUR A1 - Pirskawetz, Stephan A1 - Schmidt, S. T1 - Detection of wire breaks in prestressed concrete bridges by Acoustic Emission analysis JF - Developments in the Built Environment N2 - problem. One reason is the sensitivity to stress corrosion cracking of the prestressing steel. Failure of prestressing wires can result in collapse of the entire structure without premature indication by transverse bending cracks or considerable deformation. The response of a structure to significant number of prestressing wire breaks was studied on a bridge in Brandenburg, Germany. Two thirds of the prestressing wires in concentrated tendons of two girders were cut before the bridge was demolished. Acoustic Emission Analysis was used to detect the wire breaks. Thus, the number of wire breaks was correlated with results of other measurement techniques, in particular strain measurements on the girders. In preparation of the measurements, the acoustic properties of the bridge were determined and the suitability of Schmidt hammer impacts as an acoustic reference source was validated. KW - Real scale test KW - Acoustic emission monitoring KW - Structural health monitoring (SHM) KW - Prestressed concrete bridge KW - Stress corrosion cracking KW - Wire break KW - Destructive testing KW - Nondestructive testing PY - 2023 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-573927 DO - https://doi.org/10.1016/j.dibe.2023.100151 SN - 2666-1659 VL - 14 SP - 1 EP - 10 PB - Elsevier Ltd AN - OPUS4-57392 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -