轨道交通高架车站钢结构与混凝土结构协同分析

基于成都轨道交通高架车站钢结构雨棚方案比选和结构设计,围绕高架车站站台钢结构雨棚与下部混凝土结构考虑协同作用对比分析。通过对不同高架车站下部混凝土结构和相同上部钢结构,采用有限元软件MIDAS建立整体和独立模型,对结构分别采用反应谱分析、屈曲分析进行对比计算。找出结构整体模型计算在周期模态、最大层间位移、最大层间位移角、柱底反力、屈曲临界荷载等方面与下部混凝土结构独立计算存在的差异。分析结果表明,高架车站独立模型计算的周期均小于整体模型计算;两种模型的层间位移和柱底反力均存在差异,其中单墩柱整体模型计算不能忽视;整体模型比独立模型计算的屈曲临界荷载值大。

Collaborative Analysis of Steel Structure and Concrete Structure for Elevated Station of Rail Transit

Based on the scheme comparison and structural design of the steel structure rain canopy of the elevated station of Chengdu rail transit, the collaborative effect between the steel structure rain canopy and the concrete structure of the elevated station platform is analyzed. By using finite element software MIDAS, integral and independent models are established for lower concrete structures and corresponding upper steel structures of different elevated stations. Response spectrum analysis and buckling analysis are used respectively for structures. It is found that there are some differences between the integral model calculation and the independent calculation of the lower concrete structure in terms of periodic mode, maximum inter-story displacement, maximum inter-story displacement angle, column bottom reaction and buckling critical load. The analysis results show that the calculation period of the independent model is less than that of the integral model; there are differences between the two models in inter-story displacement and column bottom reaction; the integral model of single pier should not be ignored; the buckling critical load calculated by the integral model. is larger than that by the independent model.