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概率设计法在工程设计各领域中已逐步得到应用，而作为水工建筑物重要组成部分的水工金属结构，目前的设计方法是按现行的设计规范——《水利水电工程钢闸门设计规范》的许用应力法进行设计的。因此，水工金属结构的设计准则向概率设计法过渡已是大势所趋。现以平面闸门主梁为研究对象，对水工金属结构的概率设计问题进行了研究，建立了主梁的设计表达式并确定了各分项系数值；探讨了水工金属结构概率设计的一般方法。
Probability design method has been gradually applied in various fields of engineering design. As the hydraulic metal structure, which is an important part of hydraulic structures, the current design method is based on the current design code - “Code for design of steel gate of water conservancy and hydropower project” The allowable stress method is designed. Therefore, the hydraulic metal structure design criteria to the probability of the design method of transition is the trend of the times. Now the main gate of the plane gate is taken as the research object, the probability design problem of the hydraulic metal structure is studied, the design expression of the main beam is established, and the value of each sub-element is determined. The general design of the probability of the hydraulic metal structure is discussed method.