摘要
针对单层K8型网壳结构在强震时的动力稳定问题,应用非线性有限元理论进行了分析.计算得到单层K8型网壳结构在地震荷载作用下的动力响应,并用B-R准则判定结构的动力稳定临界荷载.结果表明,强震时单层K8型网壳结构易发生动力失稳,临界地震波峰值为0.7g,失稳的区域由第三环与径肋交叉处开始并向周围扩散直至结构坍塌.
To the dynamic stability of the K8 single layer latticed shell structures under the seismic loads, this paper carried out the dynamic stability analysis based on the nonlinear finite element theory. The dynamic responses of the structure are obtained and the B-R rule is used to determine the dynamic stability critical loads. Results show that the dynamic instability is prone to take place in the K8 single layer latticed shell structures under the strong seismic load and the dynamic stability critical load is about 0.7g. The location of instability starts from the intersection between the third circular bars and the radial bars, then it spreads abroad until the structure collapses.
出处
《河南大学学报（自然科学版）》
CAS
北大核心
2008年第6期648-652,共5页
Journal of Henan University:Natural Science
基金
国家自然科学基金资助项目(50478079)
河南大学校自然科学基金资助项目
关键词
单层K8型网壳结构
动力稳定
强震
the K8 single layer latticed shell structures
dynamic stability
strong seismic
