Detection and Characterization of Early-Age Thermal Cracks in High-Performance Concrete

摘要: Streicker Bridge is a new pedestrian bridge built on the Princeton University campus. Structural health monitoring (SHM) applied with aim of transforming into an on-site laboratory for various research and educational purposes. Two fiber optic sensing technologies are permanently deployed: discrete long-gauge technology based Bragg gratings (FBG) truly distributed Brillouin optical time domain analysis (BOTDA). The sensors were embedded in concrete during construction. This paper describes real-time detection characterization early-age thermal cracks high-performance deck Bridge. deployed strategy systems, which successfully detected cracking, described. observed crack propagation trajectories presented. Details simple finite element model (FEM) given, procedure used to demonstrate formation using this outlined.