基于不同翔实程度数据的燃气管网地震破坏评估方法研究  

Study on seismic damage assessment method of gas pipeline network based on the obtained data with different detailed levels

作　　者：王祥建[1] 郭恩栋[1] 于天洋 李倩[1] WANG Xiangjian;GUO Endong;YU Tianyang;LI Qian(Institute of Engineering Mechanics, China Earthquake Administratio;Key Laboratory＂ of Earthquake Engineering and Engineering Vibration of China Earthquake Administration, Harbin 150080, Chin)

机构地区：[1]中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2018年第2期84-94,共11页Earthquake Engineering and Engineering Dynamics

基　　金：国家科技支撑计划课题(2015BAK17B05);大中城市地震灾害情景构建重点专项(2016QJGJ11);中国地震局工程力学研究所基本科研业务费专项(2014A01);中国地震局创新团队发展计划资助项目(中国大陆地区地震灾害模拟与评估)~~

摘　　要：针对燃气管网数据获取的翔实程度不同,开展地震破坏评估不同层次模型研究。基于历史震害统计分析结果,引入地震破坏概率指标,修订了燃气管网地震破坏等级划分方法。在数据有限条件下,考虑燃气管网震害率模型不完备情况,提出类比供水管网震害率模型获得燃气管网震害率模型的方法,完善第一层次模型(震害率模型);在数据较翔实条件下,基于两态破坏准则给出燃气管道的地震破坏概率,引入加权统计平均法,建立第二层次模型(地震反应分析模型);在数据充足条件下,基于第二层次模型,提出几种因素的影响系数,修正给出第三层次模型(考虑小区划的地震反应分析模型)。以西部某市为例,分别采用三种不同层次模型评估了不同地震影响烈度下燃气管网的地震破坏状态,分析了它们的优缺点,验证了方法的实用性。According to the different degree of data acquisition in gas pipeline network,different levels of earthquake damage assessment model were studied. Based on the statistical analysis result of historical seismic damage and the seismic damage probability index,the classification of seismic damage level of gas pipeline network is revised.（1） For the case with limited data： if the seismic damage ratio of gas pipeline network is incomplete,the analogy method is used for completing it according to the seismic damage ratio of water pipeline network; and the first assessment model based on seismic damage ratio is improved.（2） For the case with more detailed data： the seismic damage probability of gas pipeline is simulated based on the assumption of two damage states; the weighted statistical average method is introduced and the second assessment model based on seismic response analysis is established.（3） For the case with most detailed data： several parameters for different influencing factors are given toamend the seismic damage probability of gas pipeline that is calculated by using the second model; and the third assessment model based on seismic response analysis and seismic microzoning is proposed. Finally,taking a city in Western China as an example,three models of different levels were used to evaluate the seismic damage state of gas pipeline network under different earthquake intensity. Then their advantages and disadvantages were analyzed and the practicability of the method is verified.

关 键 词：燃气管网 地震破坏等级 类比法 加权统计平均法 地震破坏概率 

分 类 号：P315.9[天文地球—地震学]