桥梁结构智能监测新技术研究

The New Technique Research Of The Intelligence Monitor About Bridge Cons truction

桥梁在其服役期间,由于各种原因,会出现损伤和局部的破坏。为了保证桥梁的安全服役和延长使用寿命,应该实时地把握累积损伤的状况和结构继续服役的安全程度。本文利用预先埋入的光纤布拉格光栅传感器,实现了混凝土结构损伤过程中内部应变的测量,根据载荷-应变关系曲线斜率的分歧点,可确定结构内部损伤的形成和扩展,是实现桥梁结构智能监测的一种新技术。

As a result of various causes,the concrete bridge will be subj ec ted to certain damage and local crack during the service period.In order to ens ure bridge structure safety service and extend service life,it is necessary to keep informed on state of damage and continue service safety.This paper presen ts a new technique on bridge structure smart health monitoring.The internal str ain measurement has completed,using the Fibre Bragg Grating(FBG)sensors em-bedded into con crete bridge structure.Thus,on the basis of branch point of Load-Strain curve,the damage initiation and damage extend can be determined.