斜拉桥上无缝线路梁轨相互作用机理及计算方法研究

项目名称： 斜拉桥上无缝线路梁轨相互作用机理及计算方法研究

项目编号： No.51508098

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 建筑环境与结构工程学科

项目作者： 赵卫华

作者单位： 福建工程学院

项目金额： 20万元

中文摘要： 大跨度斜拉桥上铺设无缝线路时，梁轨相互作用必然成为线路设计的控制因素。建立了“线—索—塔”一体化计算模型，在梁轨相互作用理论、桥上无缝线路计算理论和有限单元法的理论指导下，深入分析此类桥型的梁轨相互作用关系及传力机制，并编制相应的计算程序；分析温度变化、梁体伸缩、梁体挠曲、列车制动、斜拉桥主塔挠曲、斜拉索伸缩、阻尼器引起的荷载对梁轨相互作用的影响；分析斜拉索和主塔对桥上无缝线路附加纵向力的大小及分布规律的影响；分析半漂浮体系、制动阻尼器的布置对各种纵向附加力传递规律的影响；提出计算斜拉桥上无缝线路梁轨相互作用的计算方法；明确影响斜拉桥上无缝线路梁轨相互作用的评价指标。

中文关键词： 无缝线路；梁轨相互作用；斜拉桥；计算方法

英文摘要： Bridge-rail longitudinal interaction will inevitably become a design-controlling factor on continuous welded rail (CWR) on Large-span steel truss cable-stayed bridges. An integrated calculation model was established with consideration of rail, bridge, and bridge pier；Based on the guidance of bridge-rail interaction theory, calculation theory of CWR on bridges and finite element method, bridge-rail interaction relationship and mechanism of cable-stayed bridge are deeply studied and the corresponding calculation program is worked out; the influences of the loads caused by temperature change, bridge stretching out and drawing back, bridge deflection, train brake, main tower deflection, cable stretching out and drawing back and damper on bridge-rail interaction are analyzed; Influences of cable stay and main tower on the value and distribution regularity of longitudinal additional force of CWR on bridges are studied; Influences of the layout of braking damper fixed on semi-floating bridges on distribution regularity of longitudinal additional force are studied; the bridge-rail interaction calculation method and evaluation index of the CWR on cable-stayed bridge are proposed.

英文关键词： continuous welded rail; bridge –rail interaction;cable-stayed bridge;calculation method