【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.更多还原

【Abstract】 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 bearing 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.更多还原