Seismic Response Of Continuous Pipe In Particular Geology And Performence Design Based On GIS

In this paper,the analysis method of the response for buried large diameter pipeline under special circumstances and the prediction of disaster bearing capacity based on GIS lifeline system are studied.At present,the shallow buried pipeline has the characteristics of large diameter,large deformation and multiple working conditions,which makes it difficult to predict earthquake disaster of the lifeline.In this paper,the finite element software ABAQUS will be used to establish the appropriate model for numerical analysis of underground pipelines in the special environment,and the research results will be displayed to formation lifeline earthquake disaster forecast system in the GIS system.As follows that is the main research content.First of all,this paper summarizes the research theory of the fault,the failure form of the pipeline under the fault and the classical calculation method of the internal force under the fault fault.It also summarizes the liquefaction mechanism of site soil,the influence factors of site soil liquefaction and the classical calculation method of soil internal force after site liquefaction.In this paper,the model of pipe-soil contact and the shell model are presented.Then,the finite element software ABAQUS is used to establish the model of the large diameter pipeline under the fault dislocation.Considering different parameters to research pipeline reaction,such as fault type,the pipeline crossing angle under fault,fault distance of fracture zone and fault displacement,and multiple factors are combined to studied pipeline reaction rules in reality and engineering application.Finally,the simplified calculation formula of pipeline under fault dislocation is summarized.Based on the same research method,the finite element software ABAQUS is used to establish the model of the large diameter continuous pipeline under liquefaction.The model is used to simulate the damage of the pipeline by exert the earthquake acceleration on the bottom of the model.First of all,study the influence of the different load direction on the pipeline,and then consider the different parameters such as the length of liquefied area,the pipe thickness,buried depth on the influence of pipeline in liquefaction conditions,and the reaction rule of pipeline under the action of multiple factors combined.Finally,the simplified calculation formula of pipeline under liquefaction condition is summarized.The comparative analysis is made with static loading.The feasibility of the simplified formula is verified.Finally,it's formed that preliminary prediction model of earthquake damage on the GIS,according to the prior the finite element model of fault and liquefaction.The destruction results of large diameter continuous pipeline in special environment are saved as picture format.The purpose is to call for it on earthquake disaster prediction module of the GIS.This system developed stress and strain analysis function for pipeline.It greatly enriches the earthquake disaster prediction ability of the GIS.The system provide a basis for the analysis of pipeline on the GIS.