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本文在运用概率理论建立荷载效应分项系数解析表达式的基础上,对公路桥梁钢筋混凝土及预应力混凝土结构的荷载效应分项系数进行了研究。结果表明,荷载效应比值、恒载变异系数、活载变异系数以及结构目标可靠指标是影响荷载效应分项系数取值的主要因素,应当对这些参数深入研究。
Based on the analytic expression of the sub-coefficient of load effect by using probability theory, this paper studies the sub-coefficient of load effect on the reinforced concrete and prestressed concrete structures of highway bridges. The results show that the load effect ratio, constant load variation coefficient, live load variation coefficient and structural target reliability index are the main factors that influence the value of sub-coefficient of load effect. These parameters should be further studied.