城市供水管网抗震功能可靠性分析

基于供水管网震害概率预测模型,应用正弦波输入的简化算法和蒙特卡洛方法,对宁德市供水管网抗震可靠性进行分析研究,结果表明:地下管线的破坏概率一般随地震烈度的增高而增大,震害较重处与场地环境有关;从管材上看,铸铁管材震害明显重于钢管材质,大直径的管材震害轻于直径小的管材震害;管道处于液化或软弱地区震害较重;管道的使用年代较为久远、材料受腐,强度降低,会加重震害;在急剧转弯、阀门、设备等连接处管道易发生破坏.

Reliability analysis on seismic function of city water supply network

Based on the earthquake damage probability prediction model of water supply network the seismic reliability of its water supply network of Ningde City was analyzed and researched by the simplified algorithm of Sine-wave input and Monte Carlo.The results showed that the underground pipeline failure probability increased with the basic increase of earthquake intensity.The environment has a great effect on the earthquake damage of the underground pipeline.The cast iron pipe is more easily destroyed than steel pipe.Large diameter pipe have better seismic performance than small diameter.The destruction of the pipe in the liquefied or weak areas is more seriously.The long-term using,decrease intensity and corrosion,the pipe can be destroyed more seriously.The damage of the pipe is easy to occur in the sharp turn,valve and joints of the equipment.