地震工程与工程振动(英文版)
地震工程與工程振動(英文版)
지진공정여공정진동(영문판)
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION
2003年
1期
141-146
,共6页
陈仲裕%梁玉进%Farhad Ansari
陳仲裕%樑玉進%Farhad Ansari
진중유%량옥진%Farhad Ansari
acoustic emission%crack detection%concrete%earthquake%fiber optic sensors%FRP tendon%multiplexing%post seismic%structural health monitoring
Development and testing of a serially multiplexed fiber optic sensor system is described. The sensor differs from conventional fiber optic acoustic systems, as it is capable of sensing AE emissions at several points along the length of a single fiber. Multiplexing provides for single channel detection of cracks and their locations in large structural systems. An algorithm was developed for signal recognition and tagging of the AE waveforms for detection of crack locations. Laboratory experiments on plain concrete beams and post-tensioned FRP tendons were performed to evaluate the crack detection capability of the sensor system. The acoustic emission sensor was able to detect initiation, growth and location of the cracks in concrete as well as in the FRP tendons. The AE system is potentially suitable for applications involving health monitoring of structures following an earthquake.
