三跨双层地铁车站柱轴力理论解析  

Theoretical Analysis of Column Axial Force in Three-span-doublestory Metro Station

作　　者：高云龙[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《地下空间与工程学报》2016年第4期875-879,931,共6页Chinese Journal of Underground Space and Engineering

摘　　要：三跨双层地铁车站侧墙与柱起到了传递荷载的作用,目前尚未有关于柱轴力的理论解析式。基于对框架结构的力学解析,通过研究荷载在柱与侧墙的分配比例,理论推导了柱轴力的简易解析式,明确了荷载传递方式,进而分析影响柱轴力的因素及影响程度。研究后,总结归纳出柱轴力的影响因素主要有:顶板和侧墙的弹性约束、结构上部水土压力及结构自重与下部浮力的差值,而结构侧墙上水土压力对柱子轴力的影响微小。最后进行了工程实例对比,该理论解析式的结果与有限元软件计算结果相差较小,该理论解析式可在实际设计中推广应用。本文分析探明了荷载传递方向,对于三跨双层地铁车站的设计具有重要的指导价值。In three-span-double-story metro station,the side wall and column play the role of load transfer,and for which there is no theoretical analytic expression at present. Based on mechanical analysis of framework structure,this paper gains simple theory analytic expressions of column axial force by the study of load distribution ratio between the column and the side wall. Then the load transfer mechanism is clarified to analyze the factors affecting the column axial force and their impact. The result shows that the main factors affecting the column axial force are the elastic constraint of the side wall and the column and the difference between the upper load plus the structure weight and the buoyancy,while the lateral pressure has little effect. By the comparative study of project examples,the result of the simple theoretical analytic expressions are approximately the same as that of finite element software,and these can be used for practical engineering. The paper＇s conclusions clarify the load transfer mechanism and have great theoretical guiding meaning and practical application value to design of metro station.

关 键 词：地铁车站 柱轴力 影响因素 力学解析 

分 类 号：U231[交通运输工程—道路与铁道工程]