结构可靠度理论在水工结构设计标准中的应用

为了推动结构可靠度理论在水工结构设计标准中的应用和发展,系统地总结了笔者近30 a来参加完成的水工结构设计标准按结构可靠度理论修编的成功经验,提出了水工结构设计标准按结构可靠度理论修编的可靠度校准分析方法和目标可靠指标的确定原则;提出了水工结构设计标准分项系数的确定原则与方法;提出了分项系数设计表达式的相当安全系数的概念及其应用;提出了国内外结构设计标准的安全度设置水平比较时应遵循的基本原则和方法等。上述研究成果可供水工结构设计标准按结构可靠度理论进行修编时借鉴与参考。

Application of Structural Reliability Theory in Design Code for Hydraulic Structure

In an attempt to promote the application and the development of the structural reliability theory in design specifications for hydraulic structures, we systematically summarize our three decades of experiences in compiling hydraulic structure design codes which were accomplished and revised in the light of the structural reliability theory.The analytical method of reliability calibration and the principles of determining target reliability index in revising the design codes according to structural reliability theory are proposed. The determining principles and methods for the partial coefficients in design codes are put forward, and the concept and application of equivalent safety factor for the design expression of partial coefficients are presented. Moreover, the basic priciples and methods, which should be followed when comparing the safety level in design codes between China and abroad, are also proposed.The above discussions can be taken as reference when hydraulic structure design specification is revised according to structural reliability theory.