主跨2000m级单侧并置双主缆悬索桥缆索系统地震效应分析  

Analysis of Seismic Effect on the Cable System of 2000m Suspension Bridge with Single Side Juxtaposed Double Cable

作　　者：王茂强 吴玲正 杨怀茂 WANG Mao-qiang;WU Ling-zheng;YANG Huai-mao(CCCC Highway Bridges National Engineering Research Centre Co.Ltd.,Beijing 100011,China;Guangdong Provincial Highway Construction Co.Ltd.,Guangzhou 510699,China)

机构地区：[1]中交公路长大桥建设国家工程研究中心有限公司,北京市100011 [2]广东省公路建设有限公司,广州市510699

出　　处：《公路》2022年第9期176-183,共8页Highway

摘　　要：针对狮子洋过江通道主桥单侧并置双主缆缆间分离式吊索方案、共用吊索-缆间铰接方案、共用吊索-缆间刚性连接方案开展了地震响应分析。采用Midas Civil软件建立了狮子洋过江通道主桥三维有限元分析模型,考虑主缆抗弯刚度的影响,分析结构的动力特性、缆索系统的位移及内力响应。分析结果表明,分离式吊索方案并置双主缆间位移差较小,主缆间同步运动;共用吊索-缆间铰接方案的连接单元受力优于共用吊索-缆间刚接方案;主缆抗弯刚度对并置双主缆间位移差、吊索应力差、连接单元内力影响较小。推荐采用并置双主缆间采用分离式吊索或共用吊索-缆间铰接方案。The nonlinear time history analysis of seismic action is performed for the two main cables separated hanger scheme,shared hanger-cable hinge scheme and shared hanger-cable rigid connection scheme of suspension bridge with single side juxtaposed double main cable.The three-dimensional finite element analysis model is established by Midas civil software.Considering the influence of the flexural stiffness of the main cable,the dynamic characteristics of the structure,the displacement and internal forces of the cable system are analyzed.The results show that the displacement difference between the two main cables is small and the main cables move synchronoously.The force of the joint unit of the joint scheme of the shared hanger-cable hinge scheme is better than that of the shared sling-cable rigid connection scheme.The flexural stiffness of the main cable has minor influence on the displacement difference,stress difference of the hanger and the internal force of the connecting unit.It is recommended to adopt separated hanger or joint hanger between cables.

关 键 词：并置双主缆 缆间铰接 缆间刚接 地震分析 主缆抗弯刚度分析 

分 类 号：U442.55:U448.25[建筑科学—桥梁与隧道工程]