摘要
基于有限元方法建立了蒙皮体的精细有限元模型和非线性分析方法。采用空间梁单元建立了檩条和椽的分析模型,采用非线性板壳单元建立了压型钢板的精细模型,并且充分考虑了压型钢板的沟槽和褶皱效应,连接件采用空间弹簧单元模拟。在此基础上以某实际蒙皮体为背景研究了其抗剪承载力的特点并系统研究了板厚对蒙皮体抗剪性能的影响。结果表明:在较大荷载作用下结构体系仍处于线弹性阶段,但其外围的蒙皮体则已经进入塑性。蒙皮体两侧连接件的内力变化幅度较其它位置显著。两侧垂直向连接件的内力均随板厚的增加而增加,中间位置的连接件内力随板厚的增加而缓慢减小,而平行于檩条方向的连接件内力则存在差异。
The effects of plate thickness on shear capacity of the stressed skin diaphragm of light-gauge steel structures were investigated. The fine finite element model and analytical method of stressed skin diaphragm was established. The bracing frame was simulated by using spatial beam element and the profiled steel sheet was depicted by using nonlinear shell element by considering the groove and fold of sheets. The connecting piece in the stressed skin diaphragm was simulated using the multi-dimensional spring element. A real stressed skin diaphragm was taken as an example to examine the shear capacity and further investigate the effects of the plate thickness on shear capacity. The made observations indicate that the stressed skin diaphragm may enter the elastic-plastic stage even though the bracing frame is still working in the elastic stage subjected to large loadings. The varying magnitudes of internal forces of the connecting pieces on two sides of the stressed skin diaphragm are much larger than those of the other connecting pieces. The internal forces of connecting pieces in the perpendicular direction gradually increase with the increasing plate thickness while the counterparts of other connecting pieces in the middle of the stressed skin diaphragm slowly decrease. However,the internal forces of connecting pieces in the parallel direction are substantially different in comparison with those in the y direction.
作者
郑瑾
李霆
刘炳清
ZHENG Jin;LI Ting;LIU Bing-qing(Central-South Architectural Design Institute Co Ltd,Wuhan 430071,China)
出处
《武汉理工大学学报》
CAS
北大核心
2017年第8期52-57,共6页
Journal of Wuhan University of Technology
基金
中南建筑设计院股份有限公司研发课题(CSADI-YF201617)
住房和城乡建设部研究开发项目(2017-K5-003)
关键词
蒙皮效应
压型钢板
抗剪能力
连接件
参数研究
stressed skin diaphragm
profiled steel sheet
shear capacity
connecting pieeel parametric study
