液化区埋地管线的数值模拟分析  

Analysis for seismic response of buried pipeline in liquefied soil

作　　者：柳春光[1] 柯国敏[1] 

机构地区：[1]大连理工大学工程抗震研究所,辽宁大连116024

出　　处：《世界地震工程》2010年第1期125-130,共6页World Earthquake Engineering

基　　金：国家自然科学基金项目(50478094);国家"十一五"科技支撑计划项目(2006BAJ06B07-04)

摘　　要：利用ANSYS有限元分析软件,建立了由场地土液化引起的地下管道上浮反应的分析模型。用土弹簧模型模拟地下管道的受力特点,考虑了管土之间相互作用的非线性特征,通过算例分析了管道在发生上浮反应时的应力应变曲线,探讨了液化区埋地管道在发生上浮位移时的受力特征,得出了一些有意义的结果。主要有:管线的应力应变以轴向为主,并且管顶和管底的受力最大,管侧相对于管顶和管底轴向应力应变很小可以忽略;最大应变位于液化区和非液化区交界处;管线中点处等效应力达到极值等等。An analytic model for the floatation response of buried pipeline in liquefied soil is established by using finite element analysis software of ANSYS.In order to simulate the force feature of the buried pipeline,the soil spring model is used and the nonlinear characteristics for pipe-soil interaction are also considered.The stress-strain curves of the buried pipeline caused by floatation response are analyzed through an example.And the stress characteristics of buried pipeline in liquefied soil when occurring floatation response is explored.The study gets some conclusions accordant with the experimental results：the axial stress and strain along pipline are the most important responses,and the stress at the pipline＇s bottom and top are the biggest,the stress and the strain of tube side are very small which can be ignored.the maximum strain appeared at the junction of liquefied area and unliquefied area;equivalent stress at the middle point of the pipline reaches its extreme value.

关 键 词：场地土液化 地下管道 上浮 土弹簧模型 应力应变 

分 类 号：TU43[建筑科学—岩土工程] P315.98[建筑科学—土工工程]