基于区间理论的桥涵墩台基础可靠性分析

发布时间：2018-06-03 07:06

本文选题：墩台基础 + 可靠性　；参考：《铁道学报》2014年02期

【摘要】：根据墩台基础结构力学参数取值的区间性特征,引入区间分析理论,视墩台基础结构力学参数为区间变量,在确定墩台基础稳定可靠性分析的合理功能函数基础上,建立基于区间理论的墩台基础结构稳定非概率可靠性计算模型;针对区间运算结果扩张问题,引入改进的区间截断法,建立墩台基础稳定性非概率可靠性分析的区间运算方法,采用改进的一维优化算法计算墩台基础稳定非概率可靠度指标,进而建立基于区间理论的墩台基础稳定性非概率可靠性分析方法;将非概率可靠性分析方法应用于工程实例,计算结果验证方法的合理性与可行性。探讨结构力学参数变异性对墩台基础稳定性非概率可靠度指标的影响规律,具有一定的工程参考价值。
[Abstract]:According to the interval characteristics of the mechanical parameters of the pier and abutment, the interval analysis theory is introduced, and the mechanical parameters of the pier base structure are interval variables. On the basis of determining the rational function function of the stability and reliability analysis of the pier and the abutment foundation, the stability and non probability reliability calculation model of the pier base structure based on the interval theory is established. The improved interval truncation method is introduced to establish an interval operation method for non probabilistic reliability analysis of pier foundation stability, and an improved one-dimensional optimization algorithm is used to calculate the stability non probability reliability index of pier and abutment foundation, and then a non probabilistic reliability analysis method based on interval theory is established. The non probabilistic reliability analysis method is applied to the engineering example to verify the rationality and feasibility of the method. The effect of structural mechanical parameter variability on the stability of the stability of the pier and abutment foundation is discussed, which has certain engineering reference value.
【作者单位】：中南大学资源与安全工程学院;
【基金】：湖南省自然科学基金(14JJ4003) 中国博士后科学基金(2013MS31812)
【分类号】：U443.1

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