Monitoring concept for the propagation of compressive fatigue in externally prestressed concrete beams using digital image correlation and fiber optic sensors

Abstract The fatigue of concrete has been the subject research for many years, and yet, there are still open questions. In particular, fatigue‐induced damage evolution accompanied by a stress redistribution process propagating through structure is not fully understood. So far, only few experimental studies addressing propagation material zone occurring, example, in beams with pulsating, nonuniform profile. To investigate influence such configurations on structural degradation process, measuring concept developed combining digital image correlation, fiber optic sensors, conventional strain gauges. presented experiments visualize compression prestressed subjected to loading. Based measurement concept, quantitative foundation comprehensive validation design rules models accounting can be significantly extended.