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针对建筑结构分析中,存在的各种参量的不确定性影响因素,提出基于非线性粗糙多变量建筑可靠性不确定分析。首先,根据建筑物结构中的参量分析所产生的影响程度,依据粗糙集构建不确定性结构模型,并将这种结构模型的不确定性进行区间粗糙参量描述。其次,基于建筑物结构的可靠性非概率分析形式,结合可靠性区间分析方法和多粗糙变量功能函数,建立新的可靠指标评价方式,实现建筑可靠性分析性能的提升。最后,通过算例分析显示,该分析算法可更为精确的对不确定变量所带来的结构分析影响进行评价,并可提高分析性能。
Aiming at the uncertainty factors of various parameters in the analysis of building structure, the uncertainty analysis of building reliability based on nonlinear rough multivariable is proposed. First of all, according to the degree of influence of the parametric analysis in the structure of the building, an uncertainty structure model is constructed based on the rough set, and the uncertainty of the structure model is described by the interval rough parameter. Secondly, based on the reliability non-probabilistic analysis of building structure, combined with the reliability interval analysis method and multi-rough variables function, a new reliable index evaluation method is established to improve the performance of building reliability analysis. Finally, an example analysis shows that the proposed algorithm can evaluate the influence of structural analysis brought by uncertain variables more accurately and improve the analysis performance.