# [1]孙广俊,李爱群.基础隔震结构动力可靠度分析及参数优化[J].东南大学学报(自然科学版),2009,39(2):320-327.[doi:10.3969/j.issn.1001-0505.2009.02.025] 　Sun Guangjun,Li Aiqun.Dynamic reliability analysis and parameter optimization of base isolation structure[J].Journal of Southeast University (Natural Science Edition),2009,39(2):320-327.[doi:10.3969/j.issn.1001-0505.2009.02.025] 点击复制 基础隔震结构动力可靠度分析及参数优化() 分享到： var jiathis_config = { data_track_clickback: true };

39

2009年第2期

320-327

2009-03-20

## 文章信息/Info

Title:
Dynamic reliability analysis and parameter optimization of base isolation structure

Author(s):
School of Civil Engineering, Southeast University, Nanjing 210096, China
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China

Keywords:

TU352.1
DOI:
10.3969/j.issn.1001-0505.2009.02.025

Abstract:
The earthquake-induced ground motion is assumed to be zero mean valued stationary filtered Gaussian white noise process. The equation of motion of multi-degree of freedom structure with base isolation is represented by the state equation in state space according to the special situation that the damping matrix is not classical. In the state space, the complex mode superposition method is used to deduce the covariance responses of superstructure and isolation layer of base isolation system under excitation of random seismic ground motion. According to the deformation failure criterion, the limit states of superstructure and isolation layer are defined, respectively. The reliability model of the multi-story structure is considered as series connection model, the dynamic conditional failure probability of superstructure, isolation layer and base isolation structure are evaluated, respectively at given ground acceleration on the basis of the first passage mechanism. Then, a frame structure with base isolation is given as numerical example and the effect of equivalent dynamic stiffness and viscous damping ratio of isolation layer on the random response and dynamic reliability are analyzed, respectively. Considering the failure reliability as optimization objective, the parameters of isolation layer are optimized. This method can be applied to evaluate the overall performance of the base-isolation structure and can be a basis of reliability-based optimization for the seismic isolation structures.

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