Research On Pile-Soil-Structure Dynamic Interaction Of High-Cap Pile Foundations And LNG Storage Tank Under The Horizontal Seismic Action

Along with China's rapid economic development,improvement of people's living standards,LNG(Liquefied Natural Gas,LNG)has become one of the fastest growing fuel.Therefore,the amount of tanks for processing and storage of liquefied natural gas(LNG tank)have been construced,and toward large-scale.LNG storage device is expensive,it was damaged in the earthquake,not only caused huge economic losses,but also easy to cause fire,explosion,environmental pollution and other secondary disasters,threat to human life.This paper research on Pile-Soil-Structure Dynamic Interaction of High Cap Pile Foundations for LNG Storage Tank under the Horizontal Seismic Action.The main contents include:1.Verification of solid-liquid coupling vibration characteristics of tankClass 2(high tank low tank)Anchor 3-D finite element model of the tank were established.In the full tank condition,the natural frequencies and mode shapes of the finite element model were obtained,and compared with results in the literature to verify the accuracy of the ANSYS software.2.Establishment of LNG storage pile-soil-finite element modelThe wall?piles.soil of LNG storage tank was reasonable to mechanics simplify,the 1/2 finite element model of pile-soil-structure LNG storage tanks were established by Shell43?Beam4?Solid45?Fluid80 unit of finite element software ANSYS.Finite element model of the upper structure of 1/2 LNG storage tank was established,compared with results in the literature to verify the correctness of the finite element model.3.Vibration characteristics of LNG tanks considering the pile-soil-structure interactionIn the full tank and empty state,the finite element model modal analysis,the natural frequencies and mode shapes of LNG storage tank were obtained,it provide the basis for seismic analysis.4.Dynamic response of LNG storage tank under the horizontal seismicThe horizontal seismic response analysis of full tank and empty state of the LNG storage tank under 3 seismic wave has been taken,the time-history curve of the special position of tank was recorded,relative displacement?acceleration under 3 seismic waves compared with LNG storage tank with no pile-soil structure.5.Dynamic response of the LNG storage tank with anti-buckling braces under the horizontal seismicModal analysis of the LNG storage tank with anti-buckling braces and seismic response analysis of 3 seismic waves has been taken,relative displacement?acceleration under 3 seismic waves compared with LNG storage tank with no anti-buckling support.