Researches Of Seismic Response Of Liquefied Soil Layer Based On FLAC3D

Under seismic loads,building subsidence disaster,if the foundation is liquefaction,the resulting seismic subsidence more dangerous.Seis mic subsidence is divided into uniform seismic subsidence and uneven subsidence,the uneven seismic subsidence tilt,cracking can cause serious damage to buildings and other phenomena.Therefore,study on the differential settlement of the building has become an important research topic.In this paper,we use the convenient software FLAC3 D modeling,parameter adjustable and convenient in computation,computation of a large number of different conditions,which might cause the buildings uneven seismic subsidence mechanism and soil liquefaction on earthquake effect were preliminarily studied.The main work include:1 Analyze and summarize the research results of the differential settlement of the building and the application research status of FLAC3 D software,puts forward the research content of this thesis from enlightenment.2 According to the research of earthquake induced differential settlement mechanism,modeling calculation by FLAC3 D.Analysis the different characteristics of liquefied layer depth and thickness changes as well as the input seismic wave influence on the calculation results including order,type of load,amplitude,and frequency and found some regularity,and summarizes the uneven subsidence of influencing factors.3 Respectively from the time domain and frequency domain analysis of soil liquefaction effects on ground motion,the liquefaction on the ground motion attenuation effect of high frequency components and low frequency components to suppress amplification effect.4 Shortcomings of the clear paper,put forward the direction and content of the next study.