摘要
针对隔震层恢复力模型为折线型的层间剪切动力方程,研究了基础隔震结构在地震作用下的弹塑性时程反应。通过多种方法比较,说明了各种方法的优缺点。采用把结构特性和外部激励分开进行精细积分的增维分块精细积分法,避免了每一步迭代过程中的指数矩阵精细积分求解,在保持计算精度的同时,提高了计算效率;考虑地震作用特点后,增维分块精细积分法的计算效率有所提高。因此,增维分块积分法在计算基础隔震结构地震响应上是非常有效的。
The broken line type of restoring force model of an isolation equipment with inter-storey shear type for a base-isolated structure is used to study its seismic elastoplastic responses.After comparing advantages and disadvantages of current various computing methods,a new method called dimensional increment and partitioning precise integration method(PIM)is proposed.With it,structural properties and external excitations can be considered separately and solving exponential matrices by PIM in each iteration step can be avoided.Typical numerical examples show that the proposed method is very effective to compute the seismic responses of the base-isolated structure,it not only increases the computing efficiency but also keeps higher computing accuracy.
出处
《振动与冲击》
EI
CSCD
北大核心
2007年第7期145-148,共4页
Journal of Vibration and Shock
基金
教育部新世纪优秀人才计划(NCET-04-0958)
大连理工大学工业装备结构分析国家重点实验室开放基金
河南省科技攻关计划(496450009)
西北工业大学研究生创业种子基金资助
关键词
基础隔震
层间剪切模型
增维分块精细积分法
恢复力模型
base isolated,inter-story shear type,dimensional increment and partitioning precise integration method(PIM),restoring force model.
