Analysis And Control Method Of Seismic Residual Displacement Of Small And Medium-Span Beam Bridge

Earthquake is a phenomenon of nature,not only sudden strong,and the destructive serious threat to people’s normal life.To bridge this very important key point in a transportation network,how to carry out seismic fortification in design how to repair the bridge has been destroyed and how to determine whether the bridge put into use after the earthquake.Are all urgent problems to be solved.The lower level of earthquake generally does not affect the normal use of the bridge.The lower level of seismic generally does not affect the normal use of the bridge,but under strong earthquakes,the bridge structure in the nonlinear state,produce falling beam or beam displacement occurs on the seat.This require the deformation analysis and study of bridge structure after the earthquake,it is not only for the post-earthquake reinforcement structure,maintenance,and other stress analysis provides a strong basis,also made clear the problems in the design,help design improvements.This article first before the earthquake,earthquake girder bridge common plant disease,calculation of seismic response of the bridge structure,mechanical modeling elements make a brief introduction.Then to bridge the single span and four spans continuou girder bridge are studied.When how to nonlinear simulation of the bearing,by comparison to establish a simple model to verify,ultimately determine the use of force is a limit to slip simulate nonlinear elements.In addition to,the common damping selection problems in the modeling process are compared and the use of the method is illustrated,between some of the units at the time of connection coupling and how to choose just the right arm,compared explained.Using finite element analysis software ANSYS software to establish three-dimensional model,using time history analysis of seismic.Peak acceleration are calculated respectively in 55 cm/s squared,110 cm/s squared,220 cm/s squared,310 cm/s squared,400 cm/s squared,510 cm/s squared residual deformation.By changing the structure stiffness,the change methods of bearing type,are calculated respectively under corresponding conditions of displacementAccording to the analysis results,compared with Bridges in residual displacement values under different working conditions,to find a more effective way to control the residual deformation after the earthquake.By calculating the residual value of displacement we can be quick to judge for usage of the structure of the bridge after the quake,timely put forward to reinforce and repair plan,but also promote the improvement of the original bridge design...