摘要
杭州国际博览中心Ⅴ区三层无柱展厅部分设有14榀72 m跨梭形管桁架。桁架采取"地面拼装,整体抬吊"的方案进行安装,钢管桁架跨度大,受现场施工条件影响,桁架挠度变形等不确定因素较多,施工质量控制难度较大。针对该项目中大跨度钢管桁架施工特点,对钢管桁架的施工过程进行模拟分析,并对比分析钢管桁架施工完成状态与原设计状态下的结构响应差异,为合理确定构件在施工前的预起拱值提供依据。通过对大跨度钢桁架的施工方案分析,可确保桁架杆件安装的精度以及施工过程的安全性和经济性。
The column-free exhibition hall of the third layer in Ⅴ-region of Hangzhou International Expo Center is composed of 14 fusiform steel trusses,whose span is 72 m. The construction program ＂ground assembly and integral lift＂was applied in truss installation. The deflection of steel truss was hard to predict because of long span and some uncertainties including the impact of the on-site construction conditions,thus the quality of construction was difficult to be controlled. In this paper,based on the construction features of large-span steel truss,structural response differences between construction completion status and original design status were comparative analyzed by simulation analysis of longspan steel truss,which provided the basis for the reasonable pre-arching of members during the pre-construction phase. The accuracy of the truss rod installation,safety and economy of construction process could be ensured by the simulation analysis of long-span steel truss.
出处
《钢结构》
北大核心
2016年第8期81-84,111,共5页
Steel Construction
关键词
大跨度钢管桁架
桁架施工技术
施工完成状态
设计状态
预起拱
long-span steel truss
truss construction technology
construction completion status
design status
pre-arching
