【摘要】 基于可靠性原理,建立了水工钢闸门结构正常使用极限状态可靠度分析的极限状态方程,提出了钢闸门结构正常使用极限状态可靠度分析的3种计算模式,即将相对变形限值分别看作常量、随机量和模糊量,并分别给出了其统计参数.在现有荷载统计数据的基础上,采用JC法对水工钢闸门设计规范正常使用极限状态可靠指标进行了校准计算和分析.结果表明,可靠指标满足国际标准《结构可靠性总原则》的要求,且露顶门可靠指标大于潜孔门可靠指标,从而建议了现行水工钢闸门设计规范正常使用极限状态的目标可靠指标.更多还原

【Abstract】 Based on the principle of reliability, a limit service state equation for reliability analysis of hydraulic steel gate structures is established. Three mathematical models for reliability analysis are presented, in which the limit value of relative deformation is taken as a constant, a random variable, and a fuzzy variable, respectively, and its statistical parameter is also given. Then, the JC method is used for calibrating and analyzing the reliability index of the hydraulic steel gate in the limit service state indicated in the specifications for steel gate design on the basis of the statistical load data available. It is shown that the reliability index meets the demand of "general principle of structural reliability", and that the reliability index of the topemergent gate is higher than that of the submerged gate. Furthermore, a target reliability index is finally determined for the design specifications of hydraulic steel gate structures in the limit service state.更多还原