摘要
城市供水管网震后水力功能分析是评价管网震后服务能力的重要手段,针对震后漏损管网水力分析中的破坏管线出流量及其拓扑结构进行模型对比研究。通过管线破坏处的水流形态分析,得到了管网渗漏点和断开点的流出量表达式;利用局部水头损失与沿程水头损失间的等损失转化关系,建立了渗漏点与断开点出流模型的转化关系;比较分析了不同漏损出流模型的差异及其在震后管网水力计算中的适用性。分析和示例管网计算结果表明,渗漏点和断开点的水流量应分别由孔口出流处的局部水头损失和断开管段的沿程水头损失计算。
Hydraulic simulation of earthquake-damaged water distribution system （WDS） is essential to evaluate seismic service capacity of WDS. This paper first deduces the outflow models of pipeline damage （leaks and breaks） caused by earthquake with the help of flow pattern analysis, then presents the comparisons between outflow models of pipeline damage and topology models of damaged pipeline-networks. The transformations between leakage outflow and breakage outflow is obtained by conversions of minor head loss at the leak and the frictional head loss a- long the disconnected pipelines of the break. Model comparisons and application results show that the model de- duced from flow pattern analysis is competent for WDS seismic performance simulation, i.e. the outflow of the pipe leakage and breakage can be deduced from the minor head loss at the leak and the frictional head loss along the dis- connected pipe respectively.
出处
《地震工程与工程振动》
CSCD
北大核心
2013年第5期67-75,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51278017
51208017)
关键词
地震破坏管网
水力功能分析
破损模型
earthquake-damaged water distribution system
hydraulic simulation
damage model
