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基于首次超越破坏时间概率的结构动力可靠性分析

《应用力学学报》[ISSN:1000-4939/CN:61-1112/O3]

期数:
2019年02期
页码:
480-484
栏目:
出版日期:
2018-12-18

文章信息/Info

Title:
The reliability analysis of structures based on failure probability of first-passage time
作者:
刘强 王妙芳
集美大学 工程技术学院 361021 厦门
Author(s):
Liu Qiang Wang Miaofang
College of Engineering Technology, Jimei University, 361021, Xiamen, China
关键词:
首次超越破坏等效线性化方法虚拟激励法随机响应动力可靠度
分类号:
TU311.3
DOI:
10.11776/cjam.36.02.B047
文献标识码:
A
摘要:
对结构非线性动力系统的首次超越破坏(失效)进行研究。首先,采用等效线性化与随机平均方法,推导出了首次超越破坏时间的结构失效概率分布函数,并对单自由度非线性体系的失效概率进行了分析。其次,采用虚拟激励法对多自由度滞变结构体系进行了随机响应计算,结合首次超越准则(双侧界动力界限),研究了随机地震激励下高层结构的各楼层与结构整体可靠度。研究表明:在激励和破坏界限值相同的情况下,非线性体系的首次超越破坏时间概率要比相应线性体系的小;并发现了在随机地震激励下高层结构的薄弱层楼层的位置。该方法对结构的性能设计与控制具有指导意义。

参考文献/References

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