管土摩擦和管径对埋地管道破坏的影响分析
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摘要
如何分析管土摩擦和管径对埋地管道地震破坏的影响,是城市地下管道建设中面临的突出问题。采用AD INA软件的定义体操作来选择体类型,并应用布尔操作实现了管道与土体和断层之间的融合,得到地下管道破坏分析的几何模型。通过模型参数选择,确定了岩土性质、管道特性、断层等模型参数,定义了管土摩擦、地震荷载时间函数、断层位移荷载。依据计算结果,分析了管土摩擦和管径对地下管道地震破坏的影响,找出了提高埋地管道抵抗破坏能力的摩擦系数和管径最优值,给出了几点工程建议。
Analyzing the influence of pipe-soil friction coefficient and pipe radius on the damage of buried pipeline under earthquake load is the key of lifeline earthquake engineering.By the operation of define body in ADINA,the type of site body is selected,and the pipeline body is subtracted from the site body by Boolean body operators.Therefore,the geometry model is obtained.Through model preferences,the parameters of the model are defined,such as the characteristics of rock and soil in site,characteristics of pipeline and faults.Time function of earthquake load and displacement load of faults are applied,and the pipe-soil friction is considered by contact control in ADINA.According to the calculating results,influence of pipe-soil friction and pipe radius is investigated,and the best ranges of friction coefficient and pipe radius are obtained to resist the buried pipeline damage.Finally,some advice for the protection of buried pipeline under earthquake load is proposed.
Analyzing the influence of pipe-soil friction coefficient and pipe radius on the damage of buried pipeline under earthquake load is the key of lifeline earthquake engineering.By the operation of define body in ADINA,the type of site body is selected,and the pipeline body is subtracted from the site body by Boolean body operators.Therefore,the geometry model is obtained.Through model preferences,the parameters of the model are defined,such as the characteristics of rock and soil in site,characteristics of pipeline and faults.Time function of earthquake load and displacement load of faults are applied,and the pipe-soil friction is considered by contact control in ADINA.According to the calculating results,influence of pipe-soil friction and pipe radius is investigated,and the best ranges of friction coefficient and pipe radius are obtained to resist the buried pipeline damage.Finally,some advice for the protection of buried pipeline under earthquake load is proposed.
引文
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[2]高惠瑛,冯启民.场地沉陷埋地管道反应分析方法[J].地震工程与工程振动,1997,17(1):68~75.
[3]冯启民,赵林.跨越断层埋地管道屈曲分析[J].地震工程与工程振动,2001,21(4):80~87.
[4]刘爱文,张素灵,胡聿贤,等.地震断层作用下埋地管线的反应分析[J].地震工程与工程振动,2002,22(2):22~27.
[5]朱庆杰,苏幼坡.基岩条件对地震影响系数的影响分析[J].岩土工程学报,2004,26(2):198~201.
[6]蒋录珍,朱庆杰.跨断层地下管道破坏的数值模拟[J].福州大学学报(自然科学版),2005,33(Supp.):321~324.
[7]弓培林,靳钟铭.大采高采场覆岩结构特征及运动规律研究[J].煤炭学报,2004,29(1):7~11.
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