strain-gauge indicator

The uniform elongation is the characteristic strain of reinforcement steel at maximum force in simple tension test, it is an important indicator to reflect the ductility of reinforcing steel, and directly affects the seismic behavior of structure.

钢筋在拉伸试验中，达到最大作用力时对应的总伸长率为均匀伸长率，它是反映钢筋延性的重要指标，直接关系到结构的抗震性能。

The article analyzes the basic operating principle of F-P fiber-optic sensor, carries out short-term monitoring on structural strain behind abutment with the sensor, contrasts it's results with monitoring results of vibrating wire indicator, which shows that F-P fiber-optic sensor has higher success ratio and reliability.

分析了F-P光纤传感器的基本工作原理，利用F-P光纤传感器对桥台后结构应变进行了短期监测，并与钢弦应变计的监测结果进行了对比，分析表明：F-P光纤传感器成活率高，可信性高。