铁路客站板壳结构站台雨棚抗震性能分析  

Seismic Performance Analysis of Slab-shell Structure Platform Canopy of Railway Passenger Station

作　　者：杨超望 YANG Chaowang(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道标准设计》2023年第2期137-142,共6页Railway Standard Design

基　　金：中铁第一勘察设计院集团有限公司科研项目(院科20-59)。

摘　　要：随着高速铁路快速发展,车站站台雨棚不仅满足为旅客遮风挡雨的基本服务功能,还要兼顾造型美观的要求。板壳结构雨棚将两者需求同时兼顾,但这种板壳结构的屋面板雨棚结构形式受力复杂,需对其进行抗震性能研究,明确其主要的力学性能。采用有限元软件建立雨棚结构的三维力学模型,并完成了多遇地震和罕遇地震激励下雨棚的动力响应计算,得到了结构关键部位的位移、加速度、应力响应及结构损伤情况。同时,对不同跨度/波长比值的板壳结构雨棚模型进行分析。结果表明:悬挑部分对结构整体的地震效应影响较大,抗震的薄弱环节位于悬挑一侧的边柱柱脚和梁柱节点处;多遇地震作用下,雨棚结构的最大层间弹性位移角满足规范要求;罕遇地震作用下,结构构件仍处于弹性阶段内,设计的结构能够实现预期的抗震设防目标。With the rapid development of high-speed railways, the station platform canopy should satisfy not only the basic functions of keeping out wind and rail, but also the requirement of attractive appearance. While taking into account the two requirements at the same time, the seismic performance of the slab-shell structure roof canopy needs to be studied to clarify its main mechanical properties due to its complicated stress. This paper uses finite element software to establish a three-dimensional mechanical model of the canopy structure, completes the dynamic response calculation of the canopy under rare earthquake excitation, and obtains the displacement, acceleration, stress response and structural damage of the key parts of the structure. Meanwhile, the canopy models of slab-shell structures with different span/wavelength ratios are analyzed. The results show that the cantilever part has a great influence on the seismic effect of the whole structure, and the weak links of seismic resistance are located at the foot of the side column and the beam-column joints on the cantilever side. Under the action of frequent earthquake, the maximum elastic displacement angle of canopy structure meets the requirements of the code. Under the action of rare earthquake, the structural components are still in the elastic stage, and the structure can achieve the expected seismic fortification target.

关 键 词：铁路客站 雨棚 板壳结构 抗震性能 地震响应 抗震设防目标 

分 类 号：U291.6[交通运输工程—交通运输规划与管理] TU37[交通运输工程—道路与铁道工程]