水利水电技术2013，Vol.44Issue(6)：1-6,21,7.
论水工建筑物的可靠性设计
On the reliability design of hydraulic structures
陈厚群1
作者信息
- 1. 中国水利水电科学研究院,北京 100048
- 折叠
摘要
Abstract
So far the application of the method of limit state method with partial factors to substitute the conventional single safety factor method has been disputed especially in the design circles of hydraulic structures,mainly because the former to be confused with reliability analysis.The single safety factor method involves both the non-random factor of engineering experience and all random uncertainties but without regard to their degree of uncertainty.The reliability analysis method can evaluate the combined failure probability of random uncertainties with different degrees but is unable to consider the factor of engineering experience which is now still important for design of hydraulic structures.In this paper some confused concepts inducing the debate are clarified.In the limit state method not only the different degrees of all random uncertainties can be distinguished by the partial factors,but also a structural factor γd is introduced to reflect the engineering experience.Obviously,it should be more logical than the conventional single safety factor method.At present,all the partial factors have still to be determined in accordance with the traditional safety factor in order to keep the continuous of the design codes.So,the concerned method is actually a multi-safety factor method having no essential difference with the conventional single safety factor method concerning the setting of safety level as a whole.However,it is entirely different from the reliability analysis method,as a structural factor γd is introduced and all partial factors both of action effects and resistances are determined independently from the reliability index.So,neither complex theory and unfamiliar terms nor insufficient statistical data must be worried about by the designers.Finally,as an example the successful application of the method of limit state method with partial factors in the《Seismic Design Code of Hydraulic Structures》is briefly described.关键词
水工结构/安全系数/分项系数极限状态法/可靠度分析/随机不确定性Key words
hydraulic structures/ safety factor/ limit state method with partial factors/ reliability analysis/ random uncertainties分类
建筑与水利引用本文复制引用
陈厚群..论水工建筑物的可靠性设计[J].水利水电技术,2013,44(6):1-6,21,7.
