Seismic Response Of High-piled Wharf Based On Lumped Mass Model

Port is one of the most important parts of the transportation system.As the gateway of the port,wharf is a hydraulic structure for docking the ships,loading and unloading cargo and passengers.Nowadays,it has been more and more complex for port construction and the terminals are also being larger and deeper.The high-piled wharf has been widely used,because it is simple and applicable to soft soil base.Moreover,it can resist large load.The seismic performance of high-piled wharf has been concerned by many scholars both here in China and abroad.Research on the performance of high-piled wharf under the earthquake is very rich,but the domestic is lack of attention and research.This paper illustrates that the problem of pile-soil dynamic interaction is a complicated problem in soil-structure interaction.Based on a large number of papers and combined with the seismic damage of high-piled wharf in several large earthquakes,the calculation method of pile-soil interaction is summarized,which mainly includes Lumped Mass Method,Finite Element Method,Boundary Element Method and Experimental Method.Multi-piles Penzien Model is proposed which can accurately simulate the actual stress of the pile foundation and predigest the calculation process.Moreover,Finite Element Method is combined with the classical theory of Multi-piles Penzien model.A simple and practical method for the seismic analysis and design of the high-piled wharf engineering is provided.A typical structural of a high-pile wharf is selected as the research object and a spatial finite element model is established using the commercial ABAQUS software.The response of high-piled wharf under horizontal earthquake is discussed by using the method of lumped mass method and finite element method.The simulation analysis of high-pile wharf dynamic response is launched under the conditions of different seismic amplitude.And the acceleration and the displacement history output diagrams of the control points of high-pile panal are obtained in this paper.The method can provide references for the seismic design of high-piled wharf.