【摘要】 借鉴结构可靠度分析方法,给出了供水管网抗震功能可靠度分析的一次二阶矩方法。将渗漏面积作为供水管网管线震害的量化参数,使得震后供水管网的功能能够通过带渗漏供水管网的水力分析结果加以反映。通过引入供水管网系统随机水力模型,建立了渗漏面积为随机参数时管网节点水压的均值及方差计算格式。应用一次二阶矩方法,得到供水管网系统的抗震功能可靠度。通过实例分析反映了随机参数的相关系数对管网抗震可靠度的影响,并且比较了均值一次二阶矩法和改进一次二阶矩法的计算结果。更多还原

【Abstract】 The mean-value-first-order-second-moment method and advanced first-order-second-moment method are used to analyze the aseismatic serviceability of water supply network. The pipe leakage area measures the seismic damage of the water supply network. The pressure distribution of the water supply network with leakage can present the survival function of a system after an earthquake. The mean values and variances of nodal heads can be obtained through probabilistic model recognizing uncertainty in seismic damage of water supply network. Thus, the aseismatic serviceability of the water supply network is obtained. The results of the two methods are compared.更多还原