基于支座加速度输入的频域地震反应分析方法  

Analysis method for seismic response in frequency domain based on bearing acceleration input

作　　者：孙建鹏[1] 李青宁[1] 王燕[2] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,西安710055

出　　处：《沈阳工业大学学报》2013年第3期355-360,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(51078306);陕西省教育厅专项科研计划基金资助项目(12JK0916);高校博士学科点专项科研基金资助项目(20106120110004);西安建筑科技大学人才科技基金资助项目(RC1027)

摘　　要：为了真实反映结构的地震荷载输入方式及在地震作用下结构的动力反应,建立了一种基于支座加速度输入的频域地震反应分析方法,研究了结构在支座加速度输入下的动力反应.根据大质量法原理在支座处附加一大质量,在频域精细传递矩阵理论基础上建立了结构的整体传递关系,输入地震加速度傅里叶谱,依据边界条件进行求解得到结构的动力反应,编制了相应的计算程序并进行了算例分析.计算结果表明,该方法正确有效,可用于结构的地震反应分析.In order to truly reflect the input mode of seismic load and the dynamic response of structures under the seismic action, an analysis method for seismic response in frequency domain based on beating acceleration input was established, and the dynamic response of structures under bearing acceleration input was studied. According to the principle of a great mass method, a great mass was added on the support. Based on the precise transfer matrix theory for frequency domain, the overall transfer relationship of structures was established. In addition, the Fourier spectrum of seismic acceleration was input, and the dynamic response of structures was solved according to the boundary conditions. The corresponding computation program was compiled, and the corresponding analysis on the examples was carried out. The computation results show that the proposed method is correct and efficient, and can be used for the seismic response analysis on structures.

关 键 词：精细传递矩阵法 大质量法 频域 地震反应 傅里叶变换 状态向量 指数矩阵 瑞雷阻尼 

分 类 号：TU213.2[建筑科学—建筑设计及理论]