强震下弦支穹顶结构的动力性状精细化研究  

METICULOUS STUDY ON DYNAMIC PERFORMANCE OF SUSPEND-DOME STRUCTURE UNDER SEVERE EARTHQUAKES

作　　者：吴慧[1] 张瑞[2,3] 高博青[3] 

机构地区：[1]浙江财经学院工商分院,浙江杭州310018 [2]上海核工程研究设计院,上海200233 [3]浙江大学建筑工程学院,浙江杭州310058

出　　处：《工程力学》2011年第10期145-151,共7页Engineering Mechanics

基　　金：国家自然科学基金重点项目(50638050)

摘　　要：为了探索强震下材料损伤累积、节点半刚性及节点刚域对弦支穹顶结构动力性能的影响,通过对承受轴力和弯矩共同作用的焊接球节点的有限元分析,得到考虑材料损伤累积的焊接球节点M-θ曲线,建立考虑材料损伤累积的半刚性节点、节点刚域模型,然后对5个分别考虑节点半刚性、节点刚域及材料损伤累积的弦支穹顶模型进行对比分析。结果表明:考虑材料损伤累积、节点半刚性使结构塑性发展充分,结构刚度更趋向均匀,会引起结构破坏位置、失效模式及结构延性的转变。考虑材料损伤累积、节点半刚性及节点刚域等对弦支穹顶的动力性能有较大的影响。In order to investigate the effect of material damage accumulation, semi-rigid joints and rigid zone of joints on the dynamic behavior of suspend-dome structures under severe earthquakes, finite element analysis was performed on welded ball joints subjected to axial force and bending. The M-O curves of welded ball joints were obtained, and then the semi-rigid joint model was established. Furthermore, five suspend-dome models considering semi-rigid joints, rigid zone of joints and material damage accumulation respectively were analyzed. The resuits show that： semi-rigid joints and material damage accumulation cause fully-developed structural plasticity and uniform structural stiffness; the structural failure areas, failure modes and the structural ductility are also changed. So the semi-rigid joints, rigid zone of joints and material damage accumulation have a great impact on the dynamic behavior of suspend-dome structures.

关 键 词：弦支穹顶 强震作用 节点半刚性 节点刚域 损伤累积. 动力性状 

分 类 号：TU393.3[建筑科学—结构工程] TU311.3