强下部结构单层球壳简谐荷载下的破坏模式  

Failure Modes of Single-layer Latticed Domes Supported by Braced Frames Subjected to Harmonic Waves

作　　者：邢佶慧[1] 范文达 杨庆山[1] 

机构地区：[1]北京交通大学土建学院,北京100044 [2]河内建筑大学土建学院,越南河内

出　　处：《华中科技大学学报（城市科学版）》2008年第4期150-154,共5页Journal of Huazhong University of Science and Technology

基　　金：国家自然科学基金(50608002)

摘　　要：采用基于响应的研究方法,以有柱间支撑的带下部结构K8单层球面网壳为例,利用ANSYS软件分别对其进行了水平、竖向简谐荷载作用下的动力全过程分析,综合宏观和微观两个方面,通过节点位移、进塑性杆件比例等多项特征响应指标分析了简谐荷载作用下多个算例的动力破坏特点,总结了柱间设置支撑的强下部结构的单层球壳的动力破坏模式,统计了其动力破坏临界荷载,观察了矢跨比参数的影响,为网壳结构动力破坏机理研究提供了基础性材料。In this paper, non-linear dynamic analyses for single-layer latticed domes supported by braced frames subjected to both horizontal and vertical harmonic waves are performed in FEM by software ANSYS. Based on numerical analysis results of a great number of typical cases, multi-indexes responses from macroscopic and microscopic levels, which can be used for exploring the failure mechanism, are obtained. Typical failure modes of single-layer latticed domes with strong substructures are investigated. Furthermore, the dynamic failure modes and the effect of rise-span ratio of the roof for single-layer latticed domes supported by strong substructures are presented. The outcome of this study is useful for the anti-seismic structural design to structural engineers.

关 键 词：单层球面网壳 下部结构 柱间支撑 简谐荷载 坏机理 

分 类 号：TU351[建筑科学—结构工程]