Study on the Selection of Soil Calculation Area in Numerical Simulation of the Buried Pipeline
In this paper,the basic theory of dynamic infinite element is discussed,and an input method for ground mo-tion at the boundary surface of the infinite element by non-uniform excitation is proposed.Then,on condition that the bond slip effect between pipelines and soil is involved,a refined model of buried pipelines,which couples three-dimensional finite element with infinite element,is established by using dynamic infinite element bounda-ries.The dynamic response of buried pipelines by the non-uniform seismic wave excitation is numerically ana-lyzed.The values of the calculation range of the soil around the pipeline are systematically studied,and the effec-tive width W,the effective length L,and the effective depth H of the soil around the pipeline are given.The results indicate that the value of W is closely related to the pipe diameter D;H can be taken between 30-60 m,and L should include at least one wavelength of the predominant period of the ground motion.In this case,the results can meet most engineering requirements.
buried pipelineinfinite elementboundary conditionfinite element analysispipe-soil inter-action
NETL
NSTL
万方数据
维普
