摘要
冷成型钢结构中板(楼板、墙板、屋面板)的蒙皮效应之所以能够正常发挥,除了板自身的强度、刚度外,一个关键的问题是连接的可靠性.本文运用有限单元法,建立三维实体有限元模型,考虑了材料非线性与接触非线性,对钢板-自攻螺钉连接的受力情况和破坏模式进行了细致研究.首先将数值模拟结果与试验结果进行对比,验证了数值模拟方法的正确性.在此基础上,通过改变连接的板厚考察其对破坏模式的影响,得出薄-薄连接、薄-厚连接、厚-厚连接3种典型连接的破坏模式,还得出发生不同破坏模式的板的界限值和极限荷载值,为设计人员进行冷成型钢设计时提供参考.
In cold-formed steel structures, the diaphragm action in panels （floor, wall and roof） lies on the reliability of connection, besides the strength and stiffness of the panel itself. In this paper, based on the finite element method, a three-dimensional finite element model was selected to simulate performance of the self-tapping screw connections and the failure modes of the panel, considering material nonlinearity and changing-status nonlinearity. The numerical results were accordant with the test results, which proved the accuracy of the finite element model. Based on it, the failure modes and ultimate loads with different thickness of the panel could be drawn in three basic connection model （i. e. thin-thick connections, thin-thin connections and thick-thick connections）. The results provide some useful suggestions for the design of cold-formed steel structures.
出处
《应用基础与工程科学学报》
EI
CSCD
2010年第1期98-110,共13页
Journal of Basic Science and Engineering
基金
江苏省自然科学基金项目(BK2006103)
关键词
冷成型钢板
自攻螺钉连接
蒙皮效应
破坏模式
数值仿真
cold-formed steel plate
self-tapping screw connections
diaphragm action
failure mode
numerical simulation
