Study On The Infilled Wall Effect Of The Seismic Ability Of Frame Structure Under Rare Earthquake

Because of the advantages of light weight, low cost, differentiate free space,etc,infilled walls are very popular in various forms of building construction applications,and play the very important role in frame structure.However,the seismic design of reinforced concrete frame structure are always using pure frame model, which does not take the influence of actual infilled wall into account.Just taking the actual weight of the wall as a constant load and loading into the calculation model, and by reducing the structure of the natural vibration period to estimate the effects of filler wall to the whole stiffness change.Besides,the design for building function which leads to irregular arrangement and the owner are always cutting holes on the wall even remove it when decorating,which is causing the rationality of the frame structure model for debate.And in the actual construction process, the infilled walls is secondary masonry after the main structure.Infilled walls is not a structural member in Seismic code,so they only have to meet the requirements of non structural components.This creates a great potential safety hazard.Aiming at these problems,This paper made the following research work:First, this paper collected all previous earthquake damage in the destruction of the filler wall of reinforced concrete frame structure form, and organize the experts and scholars both at home and abroad on the study of filler wall model, there are infilled wall frame structure in show some unexpected damage after the earthquake.Relative to the empty frame, decorate with filling way not only to make itself with the failure forms become randomness, more make the frame structure appeared a short column effect,torsional effect and even damage forms such as "strong beam weak column" etc.Based on the study of different experts and the researches on the mechanism of the filler wall stress,this paper puts forward the integral qualitative finite element model to simulate the filler wall.Secondly, comparing the advantages and disadvantages of different seismic research method, the research method of the response spectrum method is static, the essence of which is an envelope design, and the static nonlinear methods while speed, high efficiency,but is similar to the static and dynamic combination of half, and does not describe the stress and damage of the building of the structure in the earthquake motion time, Therefore this paper put forward based on the elastic-plastic time history analysis method.In determining the selection of the model and actual seismic research method, in order to validate the rationality of the model and the accuracy of the analysis software, theauthor set up the framework of a smaller model, through the comparison and analysis with large general finite element software ABAQUS, found that all the parameters are within the error range.Established the foundation for the back of the actual project.Finally, we selected the actual engineering project to established different models,which is from the structure of a single adverse decorate a form to a variety of adverse composite filler wall structure layout,based on the different model of elastic-plastic time history analysis, comparing the models of the cycle, acceleration and displacement between layers, the interlayer displacement Angle and parameters such as stress and strain,and analyses the influence of filler wall frame structure seismic performance influence, and pointed out that the existing in the design of reinforced concrete frame, due to the structure of the overall level is not high, overall framework form simple, in the majority of pursuing new and change of architecture design style, did not take into account structure security, so at the beginning of the architectural concept design structural engineers should intervene,in order to avoid the formation of a wide range of weak layer and seismic hazard.