中文摘要：

基于对实验桥墩应变点分布的有限元法分析,设计了相适应的光纤Bragg光栅（FBG）传感网络。传感网络根据土层结构分10层布置,每层包括8个FBG应变传感器和1个温度补偿器。对桥墩进行自平衡静载荷实验,分12次完成,每次加载2350kN并持续2h,FBG传感网络实时监测不同载荷下桥墩桩结构的应变分布。监测结果表明：与传统的载荷-位移（Q-S）曲线方法相比,FBG传感网络在桥墩承载实验中能全程反映整体桩结构的变化,实现对桥梁的健康安全检测。

英文摘要：

Based on the static load test of bridge pier with root-type bars,the corresponding fiber Bragg grating（FBG） sensor network is designed.The FBG sensor locations are determined by the finite element method.10 layers of FBG sensors according to soil structure, and each layer consists of 8 FBG strain sensors and 1 temperature compensatation sensor, respectively.The loading tests are achieved by 12 times using self-balanced load test technique, and each load is increased with 2 350 kN and kept for 2 h.The FBG sensor network is applied to monitor the strain distribution of pier structure under different load conditions.The test results illustrate that compared with the traditional Q-S curves, the FBG sensor network could accurately monitor structure changes of the whole piles during the full load range, and provide a reliable basis for the safety of the bridge.