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Indexed by:会议论文

Date of Publication:2011-12-11

Included Journals:EI、Scopus

Abstract:For a small-scale model of cable-stayed bridge, the cross-sectional dimensions of tension cables are very tiny, which leads to the difficulty for the currently-existed techniques to measure the cable forces in the model test. In this paper, we designed a gripper-based FBG sensor with enhanced strain sensitivity to monitor the cable forces in the scale model tests for cable-stayed bridge. Firstly, the gripper-based FBG sensors were fabricated and attached on the model cables. And then the gripper FBG sensors were experimentally calibrated by the standard extension test of the instrumented tension cables. Secondly, the static tests of the model bridge were performed and the cable forces were measured by the gripper-based FBG sensors. Finally, the measured cable forces were compared with the results of numerical simulations. It is indicated that the gripper-based FBG sensors are suitable to monitor the cable forces for the small-scale model of cable-stayed bridge, which has the advantages of small size, high precision, and multiplexibility.