基于FBG光纤监测系统的混凝土桥梁张拉过程监控

为验证光纤光栅可应用于钢筋混凝土桥梁的施工监测，在介绍光纤光栅传感器的基本原理的基础上，在桥梁施工过程中，使用埋设在桥体混凝土结构内部的光纤光栅传感器，实时测量预应力索张拉过程中桥体关键部位的应变变化，评估张拉过程的质量，并利用监测数据进行有限元模拟计算，比较实测值与理论值，从而评价桥梁的施工质量和安全性。

Monitoring the Tension Process of Concrete Bridge with Fiber Bragg Grating Sensors

The author ,expounds the use of the fiber bragg grating sensors for motioning RC bridge, including the basic principles of the fiber bragg grating sensors. By using the fiber bragg grating sensors embedded in the concrete structure, strain change at the key position of bridge was measured while the prestressing cable was tensioned in the course of bridge construction. The measuring results were used to evaluate the tension quality and to calculate theoretic value through simulation by use of finite method. Comparing the theoretic value with the measuring value the construction quality and safety of the bridge were evaluated.