城市供水管网系统抗震能力分析模型对比研究  

Comparative study on seismic performance analysis models of water distribution system

作　　者：李立云[1] 任灿 侯本伟[1] LI Liyun;REN Can;HOU Benwei(College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《地震工程与工程振动》2020年第6期81-93,共13页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51978023,51808018)。

摘　　要：城市供水管网的抗震能力分析模型,可服务于管网系统的规划、设计和震后修复工作。抗震连通可靠性和抗震水力功能分析模型是两类应用广泛的管网抗震能力分析模型,现有研究中多选取1种模型进行评价,缺乏2种分析模型评价结果的对比研究。本文采用管网节点的连通可靠度、水量和压力满足率指标,作为管网节点的抗震连通可靠性、水力功能可靠性评价指标;基于Monte Carlo模拟方法,计算了不同地震烈度条件下4个Benchmark管网算例的抗震连通可靠性、水力功能可靠性;对比分析了2种模型得到的管网抗震能力指标结果的相关性和一致性。结果表明:对于多源点供水管网,2种分析模型节点抗震能力评价指标结果的相关性很低,排序一致性差;管网的抗震连通可靠度指标计算结果高于水量、压力满足率指标结果,管网的抗震连通可靠性指标表征的管网抗震能力偏高;管网中抗震连通可靠度低的节点,其震后水力功能指标取值虽然较低,但这些节点的震后水力功能指标在整个管网节点中的排序并不一定低;管网中震后水力功能指标高的节点,其抗震连通可靠度取值虽然较高,但这些节点的抗震连通可靠度在整个管网节点中的排序不一定高。为准确表述管网震后服务状态,建议采用水力功能分析模型进行管网的抗震评价。Seismic performance analysis model of water distribution system(WDS)is utilized to serve the planning,design and post-earthquake repair of WDS.Seismic reliability model and seismic hydraulic analysis model are two kinds of widely used seismic performance analysis models of WDS.Only one model has been selected to assess WDS in the existing research,and there is lacking a comparative study on the assessment results of these two analysis models.The connectivity reliability,water demand and pressure serviceability were used as assessment indexes of these two analysis models in this paper.Based on Monte Carlo method,those assessment indexes of four Benchmark network examples under different seismic intensities were calculated.The correlation and consistency of the assessment results were compared.The results show that for multi-source WDS,there is quite low correlation and consistency between the assessment indexes of these two analysis models.The calculation results of seismic connectivity reliability index are higher than those of water demand and pressure serviceability index,and the seismic reliability index is on the high side.For nodes with low seismic connectivity reliability,the results of post-earthquake hydraulic index are also low,but the ranking of these nodes in the whole network is not necessarily low.For nodes with high post-earthquake hydraulic index,the results of seismic connectivity reliability are also high,but the ranking of these nodes in the whole network is not necessarily high.In order to describe the post-earthquake service state of WDS accurately,it is suggested to utilize seismic hydraulic analysis model to assess WDS.

关 键 词：供水管网 抗震能力评价 连通可靠性 水力功能分析 Monte Carlo模拟 

分 类 号：TU991.33[建筑科学—市政工程] TU352.11