拉索布置下的单层球面网壳动力失效机理  

Dynamic failure of single layer spherical reticulated shell with cables

作　　者：张中昊 邓宏宇 ZHANG Zhong-hao;DENG Hong-yu(School of Water Conservancy&Civil Engineering,Northeast Agricultural University,Harbin 150030,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]东北农业大学水利与土木工程学院,黑龙江哈尔滨150030 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《塑性工程学报》2021年第6期200-211,共12页Journal of Plasticity Engineering

基　　金：国家自然科学基金青年科学基金资助项目(51109037);黑龙江省自然科学基金资助项目(E2018007);黑龙江省博士后科研启动金资助项目(LBH-Q17025)。

摘　　要：通过在双向网格面内布置交叉拉索以及在网壳面外跨节点间布置斜拉索的方式增强结构刚度、提高结构的承载能力,开发了一种新型拉索布置形式。利用通用有限元分析软件ANSYS对结构进行了动力失效分析,采用应变能响应分析方法考察了30和40 m跨度斜拉单层球面网壳动力失效特征。通过网壳杆件进入塑性比例、杆件进入塑性程度和结构关键节点位移随加速度幅值的全过程响应分析探讨了结构的破坏形式;结合动力破坏指标进一步讨论了不同初始条件下网壳结构的动力失效模式,揭示了网壳结构的动力失效机理。A new type of cable arrangement method was developed by installing the diagonal in-plane cables and out-of-plane cables between the nodes outside the grid shell surface to enhance the structure rigidity and improve the bearing capacity of structure. The dynamic failure analysis of the structure was carried out using the general finite element analysis software ANSYS,and the dynamic failure characteristics of the 30 and 40 m span diagonal single layer spherical reticulated shell were investigated by the strain energy response analysis method. The failure modes of the structure were discussed through the whole process response analysis of the ratio of rod piece into plasticity,the degree of rod piece into plasticity and the displacement of key nodes of structrue with the amplitude of acceleration. Combined with the dynamic failure index,the dynamic failure modes of reticulated shells under different initial conditions were further discussed,and the dynamic failure mechanism of reticulated shells was investigated.

关 键 词：球面网壳 拉索 双向网格 动力强度破坏 塑性耗能 

分 类 号：S26[农业科学—农业水土工程]