摘要
本文按波动理论对地震作用下供水管线反应的计算方法进行了分析,探讨了地下管道变形传递系数的两种计算方法,即基于海城、唐山地震震害经验的计算公式和基于地基反力系数的计算公式。文中论证了采用考虑管土间相对位移的双线型模型的合理性。在基于可靠度理论的供水管线震害预测方法中,对地面位移和管道不同破坏状态指标的概率统计特征进行了分析,指出了地面位移反应的概率分布为极值Ⅰ型、管道不同破坏状态的指标为对数正态分布较为符合实际。
An analysis method of seismic performance of water supply pipelines is proposed on the base of earthquake wave propagtion in this paperTwo approaches of calculation for the deformation transmission coefficient of the buried pipelines are discussedThe first one is based on the earthquake damage experiences obtained from Haicheng and Tangshan Earthquakes,and the second on the calculation formula of the ground reaction factorThe reasons of acceptance of the bilinear model,which takes account of relative drift between pipe and subsoil,are illustratedIn aspect of earthquake damage prediction of water supply pipelines, the statistic characteristics of the ground displacement and the pipeline damage index are analyzed based on reliability theoryIt is pointed out from the analysis that the probabilistic distribution of ground displacement complies with extreme value I type,but the damage indexes corresponding to various damage states of pipe lines are more approaching lognormal distribution
引文
1国家标准《室外给水排水和煤气热力工程抗震设计规范》,1984年.2韩杨,城市给水管网的震害预测,河南抗震,1989年.3符圣聪,用于埋管抗震计算的地面位移和地基反力系数,特种结构,1992年第2期.4地下管道在地震作用下的反应分析与抗震设计方法,北京市市政设计研究院研究报告,1993年.5高小旺、鲍霭斌,地震作用的概率模型及其统计参数,地震工程与工程振动,5卷1期,1986年.6C.A.cornel,EngineeringSeismicRiskAualysisBSSA,Vol58.No5,1986.7高小旺、沈聚敏,大震作用下钢筋砼框架房屋的抗震可靠度分析,土木工程学报,26卷3期,1991年.