摘要
针对斜拉网格结构体系的弹塑性动力响应问题 ,阐明斜拉索非线性特性 ,建立索塔塔柱刚度矩阵 ,研究空间杆单元恢复力模型及其弹塑性状态转换判定方法 ,给出临界点处的处理方法和结构弹塑性动力响应的计算策略 .数值分析该类结构动力特性及线性和弹塑性振动问题 .结果显示 ,斜拉索的存在提高了结构刚度 ,可显著改变结构振动特性 ,竖向地震响应明显大于水平向地震响应 ,弹塑性位移。
This paper is focused on the research of elasto plastic dynamic responses of the Cable Stayed Grid Structures (CSGS). The properties and computational methods of the cable and tower column were clarified briefly. The determination criterion of the transformation between elastic and elasto plastic states and the processing means at the critical points in the restoring force model of a barelement were studied. The computational strategies of the elasto plastic dynamic responses of CSGS were also derived. Numerical examples and comparison of this kind of structures were given. The results show that, with the cables, the structural stiffness and dynamic properties of grid structures can be enhanced and changed obviously , the vertical dynamic responses of CSGS are greater than the horizontal responses. It is also clear that the elasto plastic results of CSGS are greater than the elastic results.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2001年第4期638-642,共5页
Journal of Shanghai Jiaotong University
