城市供水管网系统抗震功能可靠度分析
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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。
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.
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.
引文
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[2]何军,李杰.大型生命线工程系统抗震可靠度的递推分解算法[J].同济大学学报,2001,7:757-762.HeJun,LiJie.Recursive decomposition algorithm for the aseismic reliability of large lifeline system[J].Journal ofTongjiUniversity,2001,7:757-762.(inChinese)
[3]Hwang(b)H,ZhouX,HuY,ShinozukaM.Comparison ofAmerican andChinese methodologies for evaluating seismic performance of water delivery systems[C].OptimizingPost-earthquakeLifelineSystemReliability,ASCE,Reston,Virginia,2000.343-350.
[4]陈玲俐,李杰.供水管网渗漏分析研究[J].地震工程与工程振动,2003,23(1):115-121.ChenLingli,LiJie.Leakage analysis of water supply network[J].EarthquakeEngineering andEngineeringVibration,2003,23(1):115-121.(inChinese)
[5]KamedaH,GotoH,KasugaT.System reliability and serviceability of water supply pipelines under seismic environment[C].Proceedings of the8thWorldConference onEarthquakeEngineering,1984,7:491-498.
[6]陈玲俐.城市供水系统抗震功能分析与优化[D].上海:同济大学,2002.ChenLingli,LiJie.Aseismic reliability analysis and optimization of water supply system[D].Shanghai:TongjiUniversity,2002.(inChinese)
[7]陈玲俐,李杰.供水管线震害量化参数——渗漏面积的估算方法[J].自然灾害学报,2003,12(1):69-72.ChenLingli,LiJie.Leakage area calculation method-the quantitative description of buried pipes aseismic damage[J].Journal ofNaturalDisasters,2003,12(1):69-72.(inChinese)
[8]LiuPeiling,KiureghianA D.Optimization algorithms for structure reliability[J].StructuralSafety,1991,9:161-177.
[9]XuChengchao,GoulterI C.Probabilistic model for water distribution reliability[J].J.WaterResourcesPlanning andManagement,1998,124(4):218-228.
[10]ChenLingli,LiJ,XuC.Aseismic reliability-based optimization for water supply network[J].Taipei,Taiwan:ChinaTheNinthConference onComputing inCivil andEngineering,2002,2:793-798.
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