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An investigation on story failure modes of frame structures

机译:框架结构的故事破坏模式研究

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摘要

Story failure mode is a structural failure pattern that should be avoided during earthquake excitations. In structural reliability analysis, the story failure mode with the highest occurrence probability is the most significant for its influence on the overall probability of structural failure. The object of this study is to search for the most likely undesirable story failure mode in a probabilistic way. The story failure modes are defined by three patterns: upper story failure pattern, middle story failure pattern and lower story failure pattern. The failure probabilities of story failure modes of multi-story frame structures designed with different column over-design factors are evaluated by FORM, and the comparison of these probabilities is conducted. It is found that for an n-story frame structure there are n story failure modes have likelihood to be the dominant story failure mode, and they are the upper failure mode with n - 1 failure stories and all the n - 1 lower story failure modes.
机译:故事破坏模式是在地震激发过程中应避免的结构破坏模式。在结构可靠性分析中,发生概率最高的故事失效模式对结构整体失效概率的影响最大。本研究的目的是以概率方式搜索最可能发生的故事失败模式。故事失败模式由三种模式定义:上部故事失败模式,中间故事失败模式和下部故事失败模式。通过FORM评估具有不同列过设计因子的多层框架结构的故事失效模式的失效概率,并对这些概率进行比较。发现对于一个n层框架结构,有n个故事失败模式有可能成为主导故事失败模式,并且它们是具有n-1个失败故事的上层失败模式和所有n-1个下层故事失败模式。 。

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