（1 广东省建筑设计研究院， 广州 510010； 2 广东省城乡规划设计研究院， 广州 510290）

［摘要］肇庆火车站站前广场钢结构雨棚为长悬臂结构，最大悬挑尺寸为43-760m。通过对比分析，确定了该结构竖向支撑体系采用斜交网格钢管柱体系，长悬臂结构采用平面桁架，为有效减小结构挠度，桁架的平面支撑采用预应力拉索。综合考虑大悬臂结构的力学特点，对结构进行内力和变形分析，并对屋面进行张拉膜结构设计。结果表明该结构安全可靠，可供同类结构设计参考。

［关键词］肇庆火车站； 长悬臂钢结构； 钢桁架； 钢管柱； 膜结构

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2017)06-0019-05

Design of   large-cantilever steel structure awning of Zhaoqing Railway Station

Chen Qian1， Ou Tong1， Yang Jianwei2， Tian Xiaoxia2， Zhang Yanhui1

(1 Architectual Design and Reasearch Institute of Guangdong Province,  Guangzhou 510010, China；

2 Guangdong Urban & Rural Planning and Design Institute, Guangzhou 510290，  China)

Abstract:Steel structure awning in Zhaoqing Railway Station Square is a large-cantilever structure with the maximum cantilever size of 43-760m. Through the comparative analysis, the vertical support system of the structure adopts oblique grid steel tubular column system. Large-cantilever structure adopts plane truss in order to effectively reduce the structural deflection. The plane support of the truss adopts pre-stressed cable. Considering the mechanical characteristics of large-cantilever structure, the internal force and deformation of the structure were analyzed, and the membrane structural design was conducted on the roof. The results show that the structure is safe and reliable, and can provide reference for design of similar structures.

Keywords:Zhaoqing Railway Station; large-cantilever steel structure; steel truss; steel tubular column; membrane structure

作者简介：陈前，硕士，工程师，Email：chenqiantuo@126.com。