摘要
采用壳元及梁元相结合的有限元模型,通过对是否开洞以及有无水平荷载等不同情况下的典型楼板进行比较分析,探讨水平与竖向荷载共同作用的地下结构大开洞楼板的力学特性。分析结果表明,与常规仅承受竖向荷载作用下的楼板不同,当有水平荷载作用时,大开洞楼板在靠洞边一定区域内的板面及相关梁内会产生较大的面内水平位移及拉力。在设计地下结构大开洞楼板时应考虑平面内拉力和平面外弯矩的共同作用。
Using the FEM model of combining shell and beam elements,and through the analysis of typical floor slab with or without opening and horizontal loading,the mechanical characteristics of floor slab with large opening for underground structure under horizontal and vertical loadings are analysed.Unlike normal floor slab only bearing vertical loading,simulation results show that slab and beams near the opening exist horizontal displacement and tension stress in the plane of floor slab with large opening under horizontal loading.The tension stress in plane and moment out of plane must be considered for floor slab with large opening in the design of underground structure.
出处
《工业建筑》
CSCD
北大核心
2009年第S1期436-439,共4页
Industrial Construction
基金
上海市科委世博科技专项基金资助项目(07dz05807)
关键词
大开洞楼板
水平荷载
壳单元
地下结构
floor slab with large opening
horizontal loading
shell element
underground structure
