系杆断裂对拱桥健康状况的影响  

Influence of Ties Broken on Arch Bridge Health State

作　　者：符晶华[1] 常立新 姜德生[1] 刘胜春[1] 眭灵峰 

机构地区：[1]武汉理工大学光纤传感技术中心,武汉430070 [2]武汉市城市路桥收费管理中心,武汉430052 [3]湖北建科结构加固有限责任公司,武汉430071

出　　处：《武汉理工大学学报》2006年第10期61-65,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(60537050);湖北省科技攻关项目(2004AA101A05)

摘　　要：通过有限元理论分析,探讨了系杆索断裂前后的拱桥结构内部力学行为的变化规律,进而研究了系杆断裂对整座拱桥健康状况的影响。作为对比,在现场进行了足尺试验,即国内某拱桥因故需要对其系杆更换,在剪断系杆索之际模拟了系杆突然断裂,采用自行研制的光纤光栅测力传感器检测某根系杆剪断前后其他系杆索力的变化情况。根据实测数据与理论分析的对比,验证了理论分析的正确性,为在系杆断裂情况下对拱桥健康状况的诊断提供了一种有效的方法。The changing rule of interior mechanical behaviors in an arch bridge structure was discussed by the finite element analysis. Then the influence of ties broken on the health state of an arch bridge was researched. As a contrast, the full-scale modcl test was carried on in the scene. That is, recently, a bridge was needed to replace all its ties in China for some reason. Its tie cables of the bridge being cut off one by one were simulated as being suddenly broken. When a tie cable of the bridge was cut off, thc changes of the axial force of the others were tested by the optical fiber grating sensors, which were developed by our selves. According to the comparison of the measured data with the theoretical analysis ones, the accuracy of the theoretical anal ysis was confirmed. Thus an effective method was provided to diagnoses the health state of an arch bridge when parts of its ties were broken.

关 键 词：光纤传感器 系杆 索力 健康状况 力学行为 系杆拱桥 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] P315.9[自动化与计算机技术—控制科学与工程]