基于FBG传感技术的混凝土开裂损伤研究  

Research on concrete cracks damage based on FBG sensing technology

作　　者：李建新 朱伟 任建乔 李智强 丁国平[1] LI Jianxin;ZHU Wei;REN Jianqiao;LI Zhiqiang;DING Guoping(School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan 430070,China;Zhejiang Academy of Transportation Science,Hangzhou 310023,China;Ningbo Zhoushan Port Company Limited,Ningbo 315099,China)

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430070 [2]浙江省交通运输科学研究院,浙江杭州310023 [3]宁波舟山港股份有限公司,浙江宁波315099

出　　处：《传感器与微系统》2025年第4期17-20,共4页Transducer and Microsystem Technologies

基　　金：浙江省“尖兵”计划攻关项目(2022C01004)。

摘　　要：为了解决混凝土结构开裂损伤难以定位和定量监测的问题,利用混凝土塑性损伤模型确定了损伤因子取值并验证了其准确性;基于光纤传感监测裂缝的原理,推导并验证了光纤布拉格光栅(FBG)应变传感器监测裂缝开展的理论关系。实验结果表明:FBG能准确监测裂缝发生和扩展过程中的规律,且理论和实验得出的定量关系近似,满足工程地误差允许。最后,建立了损伤理论下的混凝土结构裂缝开展规律,通过宏观可测的裂缝宽度来表示塑性损伤模型输出的无量纲损伤值。To solve the problem that the crack damage of concrete structure is difficult to locate and quantitatively monitor,the damage factor value is determined and accuracy is verified by concrete plastic damage model.Based on the principle of fiber-optic sensing to monitor cracks,the theoretical relationship of fiber Bragg grating(FBG)strain sensor to monitor cracks is deduced and verified.The experimental results show that FBG can accurately monitor the law of fracture occurrence and propagation,and the quantitative relationship between theory and experiment is similar,which meets the engineering error tolerance.Finally,the crack development law of concrete structure under the damage theory is established,and the dimensionless damage value output by the plastic damage model is represented by the macroscopic measurable crack width.

关 键 词：塑性损伤 光纤传感 光纤布拉格光栅 应变 损伤 裂缝 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TB303[自动化与计算机技术—控制科学与工程]