城市供水管网地震时的水力分析研究
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摘要
震后,供水管网处于低压供水状态,使得管网中部分用户的水压和水量不能得到全部满足,导致管网部分节点的实际配水量小于需水量,为此,在传统的管网水力分析基础上考虑节点流量随水压的动态变化,进而求解管网节点实际流量和水压。为了比较传统的水力分析和考虑不同节点流量与节点压力的关系对水力分析结果的影响差异,对一实际管网进行了震后水力分析。结果表明,考虑节点流量随水压动态变化的水力分析能得到合理的节点压力和节点流量计算值。
After a strong earthquake,there are some cases where nodal pressure is not sufficient for supplying the required demand in the water supply network,and the flow of water is less than that of demand before the earthquake.An efficient approach for pressure-dependent demand analysis is developed to simulate the hydraulic states of the network for low pressure cases,which is an improvement of the conventional demand-driven model.Comparisons between the conventional demand-driven approach and the pressure-dependent approach are presented for a water distribution system.The pressure dependent demand analysis approach is proved to be efficient to analyze many conditions,in which the demand is function of pressure in the water supply network.
After a strong earthquake,there are some cases where nodal pressure is not sufficient for supplying the required demand in the water supply network,and the flow of water is less than that of demand before the earthquake.An efficient approach for pressure-dependent demand analysis is developed to simulate the hydraulic states of the network for low pressure cases,which is an improvement of the conventional demand-driven model.Comparisons between the conventional demand-driven approach and the pressure-dependent approach are presented for a water distribution system.The pressure dependent demand analysis approach is proved to be efficient to analyze many conditions,in which the demand is function of pressure in the water supply network.
引文
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[9]阎立华,张莉莉,王玉宇.供水水量不足情况下给水管网的水力计算方法[J].沈阳建筑大学学报:自然科学版,2005,21(2):134-137.Yan Lihua,Zhang Lili,Wang Yuyu.Hydraulic calculation method of water network considering water-supply shortages[J].Journal of Shenyang Ar-chitecture and Civil Engineering University,2005,21(2):134-137.
[2]严煦世,赵洪宾.给水管网理论和计算[M].北京:中国建筑工业出版社,2003.Yan Xushi,Zhao Hongbin.Theory and Calculation of Water Supply Network[M].Beijing:China Architecture&Building Press,2003..
[3]柳春光,林皋,李宏男,等.生命线地震工程导论[M].大连:大连理工大学出版社,2005.Liu Chunguang,Lin Gao,Li Longnan et al.Introduction to Lifeline Earthquake Engineering[M].Dalian:Dalian University of Technology Press,2005.
[4]李杰.生命线工程抗震——基础理论与应用[M].北京:科学出版,2005.Li Jie.Lifeline Earthquake Engineering-Basic Theory and Application[M].Beijing:Science Press,2005.
[5]Wu Zhengyi,Walski TM,et al.Efficient pressure dependent demand model for large water distribution systemanalysis[C]//Proceeding of the 8thAnnual Water Distribution System Symposium,Cincinnati,Ohio,USA,August 27-30,2006.
[6]Gupta R,Bhave P R.Closure of comparison of methods for predicting deficient network performance[J].Water Resources Planning and Manage-ment,1997,123(6):370.
[7]周建华,赵洪宾.低水压供水时的管网平差计算方法[J].中国给水排水,2003,19(3):43-45.Zhou Jianhua,Zhao Hongbin.Balancing method of network under low pressure status[J].China Water&Wastewater,2003,19(3):43-45.
[8]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.Chen Lingli,Li Jie.Leakage analysis of water supplying networks[J].Journal of Earthquake Engineering and Engineering Vibration,2003,23(1):115-121.
[9]阎立华,张莉莉,王玉宇.供水水量不足情况下给水管网的水力计算方法[J].沈阳建筑大学学报:自然科学版,2005,21(2):134-137.Yan Lihua,Zhang Lili,Wang Yuyu.Hydraulic calculation method of water network considering water-supply shortages[J].Journal of Shenyang Ar-chitecture and Civil Engineering University,2005,21(2):134-137.
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