Research on Evaluating Effect of Lifeline System for City’s Ability in Reducing Earthquake Disasters

Lifeline systems are fundamental engineering facilities for maintaining daily functional operation in cities and developing after-calamity emergency rescue, including power supply system, water supply system, transportation system, communication system, and air supply system. In addition, their damages will influence cities normal operation and residents daily life seriously, which will delay the development of earthquake regions emergency rescue and restoration and reconstruction work. And at the same time, they are significant reasons generating some secondary disasters and important influencing factors causing tremendous indirect economic losses to cities. Therefore, correctly evaluating influences of lifeline system on urban earthquake disaster reduction is an important step for marking the cities ability in reducing earthquake disasters.