无柱大跨地铁车站结构选型优化及敏感性分析

Structural Optimization and Sensitivity Analysis of Column-Free Large-Span Subway Station

针对无柱大跨地铁车站结构受力情况,以影响地下车站结构受力的不同顶底板结构模型及跨度、覆土、侧压力系数等影响因素为研究对象,采用Midas GTS数值模拟计算软件建立模型,计算分析出无柱大跨地铁车站较优的结构类型。研究结果表明,无柱结构设置拱形顶底板对改善结构受力有显著效果,跨度、覆土、侧压力系数等影响因素对无柱结构受力的敏感性影响不同。

In view of the mechanical behavior of column-free large-span subway station structures,different structural models of roof and floor as well as factors such as span,cover soil,and lateral pressure coefficient that affect the mechanical behavior of underground station structures are selected as the research objects.The Midas GTS numerical simulation software is used to establish models for calculation and analysis,and optimal structural types for column-free large-span subway stations are obtained.The research results show that the installation of arched roof and floor in column-free structures has a significant effect on improving the mechanical behavior of the structure,and factors such as span,cover soil,and lateral pressure coefficient have different sensitivity effects on the mechanical behavior of column-free structures.