贝壳形钢屋盖大悬挑结构的有限元验算分析  

Finite element analysis of shell-type steel roof cantilever structures

作　　者：周继忠[1] 张士元[1] 蔡雪峰[1] 郑百林[2] 林惠忠 

机构地区：[1]福建工程学院,福建福州350007 [2]同济大学,上海200092 [3]福建省第五建筑工程公司,福建泉州362000

出　　处：《土木工程学报》2007年第11期55-58,共4页China Civil Engineering Journal

基　　金：福建省教育厅科研基金(JA06029);福建省科技重点项目(2007H0001)

摘　　要：某市重点工程贝壳形钢箱梁屋盖大悬挑结构工程,在施工安装后拆除临时支撑过程中,发现大悬挑钢箱梁结构变形过大,其值超过钢结构规范规定。为找出悬挑结构变形过大的原因和解决结构安全问题,对钢箱梁大悬挑结构原设计进行有限元方法分析。分析结果表明原设计钢箱梁大悬挑结构刚度存在不足,通过对有限元方法模拟计算结果的进一步分析,找出影响悬挑结构整体刚度的具体构件。在实际验证的基础上,结合工程实际情况,提出几种处理改进方案,并对各方案进行分析比较,选择最佳处理方案,减少经济损失,确保结构安全可靠。Due to mistakes involved in the design of a shell-type steel roof construction for an important project, the displacement in the cantilever box steel beam was found to be excessively large. In order to study the reason for such excessive displacement and find a solution method, the structure was analyzed by using the finite element method. The analysis indicated that the rigidity of the cantilever box steel beam was deficient. Based on the construction situation, some treatment options were suggested, and a comparative analysis was conducted to identify the optimal measure so as to decrease the economic loss and to guarantee the structure reliability.

关 键 词：钢结构 贝壳形 悬挑结构 有限元 

分 类 号：TU393.3[建筑科学—结构工程]