城市燃气管网的震害分析及减灾对策

通过分析地震对城市燃气管网的破坏作用及其引发的次生灾害，给出了燃气管网的震害特征和主要影响因素，包括地震动强度、场地条件、管道特性等。有针对性地提出了相应的抗震减灾对策，包括加强燃气工程设施的抗震设计，对燃气管网实施腐蚀监测和剔旧更新，设置燃气紧急自动切断系统与分区域供气，开展受损管网故障排查与恢复供气，建立地震实时监测和震害快速分析系统，制定能反映震后真实情景模式的应急反应预案，建立城市燃气管网震害风险评价和模拟仿真系统等。

Seismic Damage Analysis and Disaster Mitigation Approaches for Urban Gas Piping Systems

Based on the analysis of seismic damage effect and induced secondary disasters on urban gas piping systems, the seismic damage characteristics and influencing factors were discussed, such as seismic intensity, geologic conditions and piping system characteristics. Moreover a series of earthquake disaster mitigation approaches were proposed for urban gas piping system, including:(a)aseismatic design of urban gas facilities; (b)erosion monitoring and replacement of old pipelines;(c)automatic gas shut off system and district gas supply; (d) gas supply recovery after fault finding and treatment of damage pipelines; (e)establishment of real time seismic data acquisition and rapid pipeline damage estimation system; (f)establishment of emergency response management system; (g)establishment of urban gas network seismic disaster risk assessment and simulation system.