(中衡设计集团股份有限公司， 苏州 215021)

［摘要］苏州高铁新城第一中小学的报告厅为单层钢筋混凝土框架结构，屋盖跨度27m×30m，屋顶覆土厚600mm。本小学的艺体馆为四层钢筋混凝土框架结构，屋盖跨度33-3m×27m。对报告厅和艺体馆屋盖均采用等高度桁架和变高度桁架两种方案分别进行设计，以研究变高度桁架的应用优势。计算结果表明，变高度桁架方案的结构体系合理，各项性能指标能够满足结构的抗震性能目标，且与等高度桁架方案相比，其经济性较好。

［关键词］大跨结构； 变高度钢桁架； 经济性对比； 抗震分析

中图分类号：TU323-4文献标识码：A文章编号：1002-848X(2016)20-0061-05

Application and seismic analysis of heavy roof steel truss in a small venue building

Liu Yue, Chen Lu, Pang Honglun, Di Yunwei, Liu Tong

(ARTS Group Co., Ltd., Suzhou 215021, China)

Abstract:Lecture hall of First Middle and Primary School in Suzhou High-speed Rail New Town adopts single-story reinforced concrete frame structure with roof span of 27m×30m and roof covering of 600mm thickness. Art gymnasium of the school is a four-story reinforced concrete frame structure with the roof span of 33-3m×27m. Two schemes of equal height truss and variable height truss were used respectively for structural design to study the application advantage of variable height truss. Calculation results show that the structural system of steel truss structure scheme with variable height is reasonable and various performance indicators can meet the seismic performance goals of the structure, and it is economic compared with the equal height truss scheme.

Keywords:large-span structure;  variable height truss; economic comparison; seismic analysis

作者简介：刘悦，本科，高级工程师，一级注册结构工程师，Email:liuyue@artsgroup.cn。