基于索力和振动特性监测的多跨空间异型刚梁柔拱组合桥梁安全韧性分析  

Analysis on Safety and Toughness of Multi-span Spatial Shaped Rigid-beam Flexible-arch Composite Bridge Based on Cable Force and Vibration Characteristic Monitoring

作　　者：高二朗 崔鑫[1,2] 韩如林 GAO Erlang;CUI Xin;HAN Rulin

机构地区：[1]上海市建筑科学研究院有限公司,上海市200032 [2]上海市工程结构安全重点实验室,上海市200032

出　　处：《城市道桥与防洪》2024年第5期248-251,M0021,M0022,共6页Urban Roads Bridges & Flood Control

基　　金：上海市建筑科学研究院有限公司科技创新平台项目(KY10000038.20220021);上海建科集团股份有限公司科研创新项目(KY10000038.20220052)。

摘　　要：对多跨空间异型刚梁柔拱组合体系无推力拱桥进行有限元建模分析,基于振动法对吊杆索力进行检测,通过理论索力与实测索力的对比,分析该类复杂结构桥梁索力的受力规律。同时,基于历年桥梁索力检测结果,研究索力随外部荷载改变时的变化特征,对桥梁索力在长期运营状态下的健康状态进行安全韧性分析。通过测试桥梁的自振特性,分析桥梁结构整体性能,为评价桥梁工作状况提供依据。A finite element modeling analysis is conducted on the thrust free arch bridge with multi-span spatial shaped rigid-beam flexible-arch composite system.Based on the vibration method,the cable force of suspension rod is tested.Through the comparison of the theoretical cable force with the measured cable force,the stress rule of cable force is analyzed for this kind of complex structural bridge.Meanwhile,based on the testing results of bridge cable force over the years,the change features of cable force with the change of eternal load are studied.The safety and toughness of the health status of bridge cable force under long-term operation are analyzed.By testing the natural vibration characteristics of the bridge,the overall performance of the bridge structure is analyzed,which provides a basis for evaluating the working condition of the bridge.

关 键 词：空间异型拱桥 刚梁柔拱 索力 自振特性 

分 类 号：U441[建筑科学—桥梁与隧道工程]