钢桁梁悬索桥柔性中央扣梁端锚固方式比较研究  

Comparative Study of Cable-girder Anchorage Styles for Flexible Central Buckles of Steel Truss Girder Suspension Bridge

作　　者：曹永睿[1] 韩立中[2,3] 姜锡东 张劲泉[2,3] 

机构地区：[1]北京建达道桥咨询有限公司,北京100015 [2]交通运输部公路科学研究院,北京100088 [3]桥梁结构安全技术国家工程实验室,北京100088 [4]浙江省交通工程建设集团公司,浙江杭州310052

出　　处：《公路交通科技》2013年第9期80-86,共7页Journal of Highway and Transportation Research and Development

基　　金：国家科技支撑计划项目(2009BAG15B01)

摘　　要：通过比较某在建的大跨径钢桁梁悬索桥上2种柔性中央扣斜拉索梁端锚固方式,研究了锚箱式和耳板式柔性中央扣锚固系统的构造和设置方法,并运用大型有限元分析软件ANSYS进行了空间有限元分析,分析了锚固系统的传力途径及各板件的应力分布情况,分析结果表明柔性中央扣斜拉索耳板式锚固系统应力集中点较少且应力极值较小,相比锚箱式系统更适合在索力不太大又受结构安装空间限制的钢桁梁悬索桥上使用。该结论可为今后在同类大跨径钢桁梁悬索桥上选择合适的柔性中央扣斜拉索梁端锚固系统提供有意义的参考。By comparing two kinds of cable-girder anchorage styles （ anchor-box style and ear-plate style） for flexible central buckles of a long-span steel truss girder suspension bridge under construction, the structures and installation methods of two kinds of flexible central buckle anchorage system are studied. Then, by using ANSYS for FEM analysis, the stress transferring mechanism of the cable anchorage system and stress distribution of plates are analyzed. The results show that the stress concentration points and extreme stress of the cable-stayed ear-plate style of flexible central buckle anchoring system are less, it is more suitable for the steel truss beam suspension bridge whose cable force being not too large and structure installation space being limited compared to the anchor-box system. The conclusion could be a meaningful reference for choosing the appropriate design of flexible central buckle cable-girder anchorage system for the similar steel trussed girder suspension bridge.

关 键 词：桥梁工程 钢桁梁悬索桥 有限元分析 中央扣 梁端锚固系统 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]