Numerical Analysis And Research On Seismic Response Of Shallow Road Tunnel Under Unsymmetrical Pressure

In recent years, due to the increase of national economy,infrastructure construction is also ushered in a golden period,including large quantities of highway tunnel.Ensuring the normal use of the tunnel can be particularly important under seismic action because Our country is in an earthquake prone zone.So according to the IV1 grade rock shallow tunnel unsymmetrical pressure, I use the finite difference method to study earthquake resistance within domain time in this paper.The research work of the main is started from the following several aspects:1.Understanding domestic and foreign research status of seismic and damage of examples of projects, identify the major form of seismic damage of the tunnel,Research and analysis the dynamic soil-structure interaction in the theory;Introduce the finite element differential dynamic software FLAC3 D calculation theory.2.Firstly, this paper introduces several ways of selected seismic waves,seismic wave signal input need to be processed using OriginPro software when analysis soil-structure interaction in time domain.Secondly the seismic wave recorded usually has the errors of "noise", so I conduce baseline drift correction and can cell error impact.3.According to the actual engineering situation, I choose suitably parameters of surrounding rock and establish the shallow tunnel under unsymmetrical pressure.The static and seismic are respectively applied to the model for calculation by the finite difference software FLAC3 D.4.Using a single variable method,analysis of slope for tunnel structure effect under seismic action on the dynamic response.At the last part of the paper, I summarize the work this article have done as well as the main results and pointed out the deficiencies in this study and the future research directions.