Random Earthquake Response and Reliability Analysis of Base-Isolated Structure (Part 1): Modeling and Random Response Analysis
In this paper, the earthquake-induced ground motion is assumed to be a zero mean stationary filtered Gaussian white noise process with a Kanai-Tajimi power spectrum. The equivalent linearized dynamic stiffness and viscous damping ratio are considered as the parameters of isolation layer for simplicity of analysis. Due to the disparity between the high damping in isolation layer and the low damping of superstructure, the damping matrix of combined system is non-classical. According to the special situation, the equation of motion of MDOF (multi-degree-of- freedom) discrete structure with base isolation is represented by the state equation. In state space, the complex mode responses are analyzed and the complex mode superposition method is used to deduce the covariance responses of superstructure and isolation layer of base-isolated structure under random excitation in time domain. The results can provide a basis for reliability assessment of the seismic base isolation structure.
Base isolation Earthquake Random response State space Complex mode
Guangjun Sun Aiqun Li
College of Civil Engineering, Southeast University, Nanjing 210096, China
国际会议
南京
英文
1095-1099
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）