拱桥吊杆荷载效应光纤光栅监测与安全评定

Loading effects' FBG monitoring system and safety evaluation of arch bridge suspenders

以四川峨边大渡河下承式钢管混凝土系杆拱桥为背景,针对吊杆健康监测与安全评定问题,详细介绍了该桥吊杆车辆荷载效应光纤光栅监测系统的组成,基于监测结果的车辆荷载效应分析的理论与过程,以及吊杆安全评定准则和该系统试运行状况及其监测结果．试运行结果表明,该系统可以有效地监测车辆荷载效应,依据其监测结果统计得到的车辆荷载效应及安全评定结果更贴近实际．

Focusing on the problem of suspender's monitoring and safety evaluation, a suspenders' load effect monitoring system with fiber sensor was set up on the Ebian Dadu River Bridge in Sichuan province. The component of this system was introduced in detail. The theory and process of traffic load effect analysis using in-service data was researched. The safety evaluation criterion for suspender was set up. Finally, the system carried out a test run. The test result shows that the system can effectively monitor the traffic load effect, so that the evaluation result is closer to the real situation.