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基于多维性能极限状态的结构易损性分析 被引量:22

MULTIDIMENSIONAL PERFORMANCE LIMIT STATES FOR STRUCTURAL FRAGILITY ESTIMATION
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摘要 由于基于性能的单指标易损性方法在结构易损性分析中忽略了非承重构件及设备仪器破坏的影响,该文提出了基于多维性能极限状态的易损性分析方法,采用承重构件敏感的最大层间位移参数与非承重构件及设备仪器敏感的最大加速度参数作为性能量化指标,建立了基于多维性能极限状态的广义方程描述结构整体的极限破坏状态。根据超越概率的定义,并考虑量化指标间相关性及其阀值的随机性,推导得到了二维性能极限状态下超越概率的解析解;并利用matlab拟合得到了结构在正常使用、可以使用、生命安全、防止倒塌四个性能水平下的易损性曲线。 A new method for multidimensional performance limit states was developed to analyze the structural fragility. Concerning the randomness and dependency of the limit states, a generalized formulation was proposed with the inter-story drift and acceleration as the quantitative indexes based on the probabilistic description of the limit states. The analytical solutions of the probability of exceedance are given under four performance levels: Normal Operation, Immediate Occupancy, Life Safety, and Collapse Prevention. And the fragility curves used to evaluate the buildings' performance synthetically are generated through Matlab.
出处 《工程力学》 EI CSCD 北大核心 2013年第5期147-152,共6页 Engineering Mechanics
基金 国家自然科学基金项目(51278420 50878184) 西北工业大学研究生创业种子基金项目(Z201357)
关键词 结构易损性 性能量化指标 多维性能极限状态 相关性 随机性 解析解 structural fragility performance quantitative indexes multidimensional performance limit states dependency randomness analytical solutions
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