考虑整体节点板刚域效应的钢桁悬索桥结构特性研究  

The Study on Structural Characteristics of Steel Truss Suspension Bridge Considering the Rigid Region Effect of Integral Gusset Plate

作　　者：雷薇 刘汉彪 LEI Wei;LIU Han-biao(Hunan Agricultural and Forestry Industry Survey,Design and Research Institute,Changsha,Hunan,410007,China;Hunan Transportation Planning Survey and Design Institute Co.,Ltd.,Changsha,Hunan,4102190,China)

机构地区：[1]湖南省农林工业勘察设计研究总院,湖南长沙410007 [2]湖南省交通规划勘察设计院有限公司,湖南长沙410219

出　　处：《黑龙江交通科技》2021年第9期96-98,共3页Communications Science and Technology Heilongjiang

基　　金：交通运输部建设科技项目(2013318798320)。

摘　　要：钢桁加劲梁杆件交汇节点位置局部刚度得以加强,杆件轴向、弯曲和扭转刚度相应增大,存在整体节点板刚域问题。为研究整体节点板刚域效应对钢桁悬索桥结构静动力学特性的影响,以矮寨钢桁悬索桥为研究背景,利用有限元对比分析手段,通过考虑刚域增强效应的刚臂梁单元模型分析结果与普通梁单元模型分析结果进行对比研究。研究表明,整体节点板刚域对结构的竖向刚度、桥塔纵向刚度有一定提高;钢桁架腹杆受力明显增大;对结构主缆、吊索静力特性以及结构动力特性影响较小。The local stiffness of the joint of the steel truss stiffening girder is strengthened,and the axial,bending and torsional stiffness of the members increase correspondingly,which results in the problem of the rigid region of the integral gusset plate.In order to study the influence of the rigid region effect of the integral gusset plate on the static and dynamic characteristics of the steel truss suspension bridge,taking Aizhai steel truss suspension bridge as the research background,uses the comparative analysis method,and compares the analysis results of the rigid arm beam element model considering the strengthening effect of rigid region with that of the ordinary beam element model.The research shows that the integral gusset plate rigid region has a certain improvement on the vertical stiffness of the bridge and the longitudinal stiffness of the tower;the stress of web members of steel truss increase obviously;the static and dynamic characteristics of the main cable and slings are less affected.

关 键 词：整体节点板 节点刚域 钢桁悬索桥 力学特性 

分 类 号：U442[建筑科学—桥梁与隧道工程]