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。
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.
出处
《建筑结构》
CSCD
北大核心
2016年第23期73-78,共6页
Building Structure
关键词
大跨度钢桁架
提升施工
有限元分析
应力比
large-span steel truss
lifting construction
finite element analysis
stress ratio
