（1 内蒙古科技大学钢结构与空间结构研究所， 包头 014010； 2 浙江精工钢结构集团有限公司， 绍兴 312030）

［摘要］针对大跨度钢结构施工过程中较为复杂的受力问题，以哈尔滨某滑雪场工程为例，对其钢桁架屋盖进行施工过程模拟分析，研究了由施工产生的附加应力对杆件的影响；利用有限元方法，分析提升吊具的强度和刚度；通过多尺度有限元法，探究提升吊点的受力性能。结果表明：在考虑了不同步效应的提升施工中，被提升结构的杆件强度能够满足要求；提升架在提升反力等荷载作用下，能够满足设计要求；由于附加应力的存在，需对不满足承载力要求的杆件进行替换；提升吊具和吊点均满足设计要求。分析中多个计算参数的选择，具有较高的准确性，对同类工程分析研究有借鉴意义。

［关键词］大跨度钢桁架； 提升施工； 有限元分析； 应力比

中图分类号：TU392-5文献标识码：A文章编号：1002-848X(2016)23-0073-06

Lifting construction analysis on a large-span steel truss roof structure

Chen Ming1， Sun Jiajia1， Zheng Bo2

（1 Institute of Steel and Spatial Structure, Inner Mongolia University of Science and Technology, Baotou 014010, China； 2 Zhejiang Jinggong Steel Building Group Co., Ltd., Shaoxing 312030, China)

Abstract:A ski field project in Harbin was taken as an example to study the complex mechanical problems in large-span steel structure construction process. Construction process simulation analysis was carried out on its steel truss roof to study the influence of construction-generated additional stress on the members. The finite element analysis method was used to analyze the strength and stiffness of the lifting tools. Multi-scale finite element analysis method was used to study the mechanical properties of the lifting points. Results show that: the bar strength of lifted structure can meet the requirements in lifting construction when considering the non-synchronous effect; lifting frame can meet the design requirements under lifting reaction force loads; the bars that cannot meet the bearing capacity requirements should be replaced due to the existence of the additional stress; lifting tools and lifting points fulfill design requirements. The selection of various calculation parameters in analysis is accurate, providing reference significance for analysis and study of similar engineering.

Keywords:large-span steel truss; lifting construction; finite element analysis; stress ratio

作者简介：陈明，博士，教授，硕士生导师，学术副院长，Email：cmlx-1978@163.com。