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采用结构可靠度理论,从既有雨水管网系统节点出发,分析了影响节点上下游输水能力的管径d、粗糙度n、水力坡度J、计算模型NR以及汇入节点处的雨水流量q的不确定性因素;使用Monte-Carlo法确定节点处的可靠度;采用串联结构模型窄界限法确定出既有管网的可靠度。
Based on the structural reliability theory, the pipe diameter d, roughness n, hydraulic gradient J, calculation model NR and rain flow q at the entry node are analyzed from the existing network nodes of the rainwater network. Uncertainty factors are determined. The reliability of nodes is determined by Monte-Carlo method. The reliability of existing pipe network is determined by the narrow boundary method of tandem structure model.