水工混凝土结构分项系数设计法可靠度研究

本文对《水工混凝土结构设计规范》修订稿承载能力极限状态设计表达式中分项系数的确定方法及取值方案进行了分析计算和探讨，提出了相应的分系数取值建议。文中提出的确定分项第数的方法可概括为：根据各基本变量变异性的大小，事选选定合适的作用与材料性能分项系数，然后由给定的目标可靠性指标，用概率方法确定设计表达式中的结构系数，这种分项系数设置体系和方法，不仅物理意义明确，而且由于作用与材料性能分项系数可事先选定

On reliability of concrete hydraulic structures

This paper investigates the evaluation of term-separated coefficients in a limit state expression of structual bearing capacity in Design Norms for Concrete Hydraulic Structures (revised draft). The method proposed in this paper for evaluating these coefficients may be summarized:according to the range of variation of basic variables. appropriate values of respective coefficients of both actions (loads) and material properties can be selected in advance; based on given reliable objective indices,the values of structural coefficients in the limit state expression are then determined using probabilistic method.This method not only has definitely physical meaning,but also makes the whole evaluation of various coefficients much simplified due to that coefficients of both actions (loads )and material properties may be selected in advance and only the structural coefficients need to be determined probabilisticly. The reliability analysis shows that with different design conditions,the reliabilities of elements of hydraulic structures designed by this method are in good agreement with each other.