地震灾害下城市生命线体系恢复力双维度综合评估

针对现有生命线恢复力研究中单一维度评估的缺陷，引入基础设施网络均衡理论，设计综合考虑生命线网络物理状态和输送能力的体系性能时程响应函数PRF，同时构建包含灾害概率、灾害后果、恢复速率三个主要因素在内的，贯穿技术和组织双维度的生命线体系恢复力评估框架，实现地震灾害下城市生命线体系恢复力双维度综合评估。在以江苏省连云港市区供水网络为例的案例研究中，依据评估框架构建体系恢复力仿真流程，采用场景地震，对环状和网状两种供水体系的震害恢复力进行对比分析，结果显示，尽管网状供水网络的性能水平高于环状网络，但对体系恢复力的提升作用并不明显。而且城市供水体系恢复力随着恢复资源投入量的变化曲线显示，恢复资源的投入量存在最优值，能够以高效费比实现体系恢复力最大化。

Seismic resilience assessment of urban lifeline systems: a double-dimensional approach

In order to assess the seismic recovery capability of urban lifeline systems, a framework, including damage probability, damage consequence and recovery speed, is proposed to assess the seismic resilience. Different from the previous assessment approaches considering single resilience dimension, a new performance response function (PRF) based on the infrastructure network equilibrium theory is used to assess the seismic resilience in integrated technical and organizational dimensions. On the basis of the framework, a simulation procedure is constructed to compare the seismic resilience of two different topologies, i.e. looped network and meshed network, of municipal water supply network in Lianyungang, China. The variation rules of resilience with the two different network topologies under different recovery conditions are also thoroughly investigated. The results show that the meshed network can improve the water supply performance, but it can’t effectively enhance the seismic resilience. Furthermore, the variation curve of resilience with recovery resource shows that an optimum value of recovery resource exists.