【摘要】 斜拉桥的不同工序中参数的影响程度不同,同时,施工过程中各参数存在时变性,可靠度分析中不存在显式的功能函数,因此,其参数敏感性分析存在特殊性和困难性。基于结构可靠度的一次二阶矩法原理,推导了参数敏感性计算公式,结合斜拉桥施工期的时变可靠度计算程序,分析了施工阶段斜拉桥时变可靠度的主要参数的敏感性。在此基础上可以明确斜拉桥施工过程中应重点控制的施工参数,以提高其施工质量控制的主动性,确保大桥达到设计可靠指标。更多还原

【Abstract】 The parameters’ influence is different in each construction phase of cable-stayed bridges and the (performance) function is implicit. Based on the principle of first and second order reliability method, the (formulas) are introduced. The parameters’ sensitivity is studied for time-variant reliability of cable-stayed bridges during construction. The results shows that the emphases should be paid to the key parameters in advance which results in better construction quality.更多还原