Research on Seismic Reliability Criteria of Urban Lifeline Network Systems

Abstract

Urban lifeline network systems are the material base of urban health operations. The components damage and function loss of lifeline system are caused by strong ground motion. Urban lifeline system can continue to run that after the event, the seismic reliability of urban lifeline network must be reasonable determined. Based on the network system characteristics, the three network elements namely nodes, routes and flow of various lifeline systems are given. The especially important components to reduce earthquake disaster in lifeline network system are puts forward clearly. Connectivity, maximum flow, service and economic loss as a quantitative measure of lifeline engineering system network performance. Connectivity, maximum flow, service and economic loss are regarded as the representative quantitative measures of network performance. The performance standards of lifeline system consist of three aspects by quantitative expression as followed: the number affected by interrupted lifeline, the disaster influence range affected by interrupted lifeline and the time required to complete repair after earthquakes. The performance standards of lifeline system are classified by the total number, the disaster influence range affected by interrupted lifeline and the time required to complete repair after earthquakes. And the seismic reliability criteria of urban lifeline network systems are suggested finally.