（北京城建设计发展集团股份有限公司上海分公司， 上海 200233）

［摘要］以某浅埋地铁停车线的单层双跨结构为例，运用工程结构优化设计的基本原理，对结构优化前后两个不同横剖面结构形式分别建立计算模型，然后进行有限元计算，最后对结构内力计算结果和截面配筋分别进行比较分析。结果表明优化后的结构受力体系简单，不但能够保证地铁车站的安全稳定，而且所用混凝土量和钢筋量均小于优化前的需用量，降低工程造价与施工费用，可以为相似工程提供借鉴。

［关键词］浅埋地铁停车线； 单层双跨结构； 优化设计； 有限元

中图分类号： TU93 文献标识码： A文章编号： 1002-848X(2015)S2-0065-04

作者简介：班自愿，硕士，工程师，Email:zhiyuan82@126.com。

Optimization design and computational analysis about vehicle parking

 lines of the shallow-buried metro

Ban Ziyuan

(Shanghai Branch of Beijing Urban Construction Design ＆ Development Group Co., Ltd., Shanghai 200233, China)

Abstract： The optimization design is applied in a single-layer frame structure of shallow-buried metro′s vehicle parking lines. Calculating models of two different cross sections of pre-optimized and optimized were separately set up, and then they were analyzed by the finite element method. Both the internal forces and the steel reinforcement about the frame structure were contrastively analyzed. The results indicate that the structure of optimization design is safe for use and the amount of structure materials can be cut down, which can provide guidelines for the similar engineering.

Keywords: vehicle parking lines of the shallow-buried metro; single-layer frame structure; optimization design; finite element