The Finite Element Analysis Of The Shear Structure Of A High-rise Frame Shear Structure

In the event of continuous collapse of the building structure,there will be serious property damage and casualties.Since the collapse of Ronan Point apartment in 1968,the problem of continuous collapse has been a hot topic in the field of civil engineering.So far,many domestic and foreign experts and scholars have done a lot of research on this issue and have made important research results,but a large number of research objects are frame structures.At present,the urban construction is developing in the direction of high-level and complex.The frame-shear structure has become a major structural form.Taking a high-rise frame-shear structure as an example,the main research work is as follows:(1)Design and analysis methods of continuous collapse at home and abroad.On the basis of elaborating the research status of the continuous collapse problem,this paper discusses and summarizes the design methods of the problem: concept design,tensile strength design method,dismantling component design method and local reinforced design method,as well as analytical methods: linear(nonlinear)static Force analysis and nonlinear dynamic analysis.(2)Through the MIDAS/GEN finite element software,Pushover analysis was carried out for a high-rise box shear structure.According to our country "housing collapse preventing performance of architecture design rules from cesg provisions in 392-2014,choose to dismantle component method,on the first floor,the fifth layer,layer and top level 14,demolition of Angle respectively,in the long/short while column,the column and the first part of the shear wall,Pushover analysis to view the structure of the residual shear,interlayer displacement Angle and horizontal component plastic corner whether meet the specification requirements,and then determine whether the structure of continuous collapse.(3)Analysis of anti-continuous collapse measures.Mainly from the change of thickness,column section size,set the transformation layer(Thick plate transition)in three aspects,choose removed first Angle Pushover analysis,the plastic Angle of view the remaining components whether meet the requirements of continuous collapse resistance.(4)The analysis conclusion and the proposal of anti-continuous collapse design.It is concluded that when the corner column is removed,the structure's resistance to continuous collapse is relatively weak.The removal of the shear wall easily leads to the continuous collapse of the structure,so it is necessary to take measures to protect the shear wall and the corner column from being damaged.Design proposal: when the collapse resistance design,can choose to dismantle the first layer of Pushover analysis Angle,and USES the enlarging column section size or sets the transformation layer(Thick plate transition)ways to improve the structure of the ability to resist collapse,considering the economy,preferable set transformation layer method.This paper aims to study the anti-continuous collapse performance of high-rise frame shear structure and provide technical reference for anti-continuous collapse design,which has certain practicability.