考虑随机变量相关性的可靠度分析

The Reliability Analysis about Correlative Random Variable

分析了在小偏心受压构件中弯矩与轴向压力的相关性。对钢筋混凝土小偏心受压构件建立了以弯矩表达的极限状态方程，阐述了考虑弯矩与轴向压力相关性的可靠度分析方法。为了说明考虑基本变量相关关系的重要性，对钢筋混凝土小偏心受压构件作了两种可靠度分析比较：①考虑了弯矩与轴向压力的相关性；②假设弯矩与轴向压力互不相关。

In this paper,for compressed member with small eccentricity in reinforced concrete,correlativity between bending moment and axial pressure is analyzed,and boundary state formulae expressed by bending moment are established. A method of reliability analysis about correlativity between bending moment and axial pressure is described. Two kinds of reliability analyses about compressed member with small eccentricity in reinforced concrete are made to introduce the importance about correlativity of basic variable:①assuming that bending moment is correlative with axial pressure. ② assuming that bending moment is not correlative with axial pressure.