高速铁路多塔矮塔斜拉桥力学性能研究  

Research on Mechanical Performance of Multi-pan Extra-dosed Cable-stayed Bridge of High Speed Railway

作　　者：潘湘文[1,2] PAN Xiangwen(China Railway Shanghai Design Institute Group Co.,Ltd.,Shanghai 200070,China;Southeast University,Nanjing 211189,China)

机构地区：[1]中铁上海设计院集团有限公司,上海200070 [2]东南大学,南京211189

出　　处：《铁道标准设计》2021年第7期98-102,共5页Railway Standard Design

摘　　要：随着高速铁路的快速发展,矮塔斜拉桥在铁路中越来越多地得到应用。以池黄高铁三塔矮塔斜拉桥为工程背景,研究多塔矮塔斜拉桥的合理结构体系和结构参数。通过改变结构体系和结构参数,比较结构在荷载作用下的力学性能。研究结果表明:塔梁固结和刚构组合体系结构刚度大,在温度、收缩徐变作用下,结构次内力较小,适用于多跨矮塔斜拉桥;矮塔斜拉桥可通过增设辅助墩和次边跨的方式,减小梁端转角和改善边支座受力;结构静力性能受梁高的影响较大,受塔高影响较小,设计时在满足结构刚度的前提下,通过优化边中支点梁高组合和增大塔高以改善结构受力。With the rapid development of high-speed railway,the extra-dosed cable-stayed bridge is increasingly used in the railway.Taking the three-tower extra-dosed cable-stayed bridge of Chizhou to Huangshan high-speed railway as the engineering background,this paper investigates the rational structural system and mechanical performance of the multi-span extra-dosed cable-stayed bridge,and compares the mechanical properties of structures under load by changing the structural system and structural parameters.The results indicate that the tower and girder rigid fixity-rigid frame combined system is suitable for multi-span extra-dosed cable-stayed bridge due to its large structural stiffness and small sub-internal force of the structure under the action of temperature,shrinkage and creep.The extra-dosed cable-stayed bridge can reduce the corner of the beam and improve the edge support force with additional auxiliary girder and sub-edge span.The structural static performance is greatly influenced by beam height and less influenced by tower height.The structural stress can be reduced by optimizing the edge of the middle-fulcrum beam height combination and increasing the tower height once the stiffness of the structure is satisfied in the design.

关 键 词：高速铁路 铁路桥 多塔斜拉桥 矮塔斜拉桥 结构体系 结构参数 力学性能 

分 类 号：U441[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]