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本文提出了自立式高耸结构抗风可靠性分析的一个改进方法,用以解决目前抗风可靠性分析方法中存在的几个问题。文中:(1)考虑了高耸结构承载能力和正常使用(包括避免非结构构件损坏和人的不舒适感)两种极限状态;(2)对结构反应峰极值的概率分布函数采用了对Vanmarke分布的一个半经验的修正结果,使可靠性计算的误差由基于Poisson近似假设的30％降低到6％以内;(3)考虑了其它荷载随机性和构件强度随机性对结构抗风可靠性的影响;(4)采用了一次二阶矩的验算点法,将结构的抗风动力可靠性统一到可靠指标β上来分析。
This paper presents an improved method for reliability analysis of self-supporting high-rise structures against wind, in order to solve several problems existing in wind resistance reliability analysis methods. In the article: (1) Two extreme states of high-rise structure bearing capacity and normal use (including avoidance of damage of non-structural components and discomfort) are taken into account; (2) The probability distribution function of peak values of structural reactions is adopted to Vanmarke. A semi-empirical correction result of the distribution reduces the reliability calculation error from 30% based on the Poisson approximation assumption to 3%; (3) Considers the randomness of other loads and the randomness of the component strength to the wind resistance reliability of the structure. Impact; (4) A second-order moment checking method was used to analyze the reliability of the wind resistance of the structure to the reliability index β.