Research On Seismic Performance Analysis And Parameter Optimization Of Fabricated Shear Wall Structures

At present,there are many residential and commercial office buildings with integral frame structure and integral shear wall structure in many parts of our country.Such buildings have a short construction period,fast construction pace,environmental protection and other characteristics.This type of building can achieve the quakeproof effect similar to the cast-in-place structure,and is in line with the concept of saving the society and environmental protection advocated by the state and has good development prospects.Although some achievements have been made in the research of the assembled shear wall structure,the research on the connection joints and the overall seismic performance can not be neglected.Therefore,it is very important to study the seismic performance analysis and parameter optimization of the assembled shear wall structure.In this paper,an example of an assembled shear wall structure residential,I use ANSYS finite element software to carry out the modal analysis of the building,and the dynamic time history analysis when this structure is in a state of frequent earthquakes and rare earthquakes,and I optimize the parameters of the assembled of shear wall structure,and we can get the following conclusion:(1)ANSYS finite element model is established for the joints of the assembled shear wall,and I compare with the existing experimental data.The results are basically close to verify the correctness of the model.Using this modeling method,I analyze the joints contained in the instance using this modeling method,and compare with the cast-in-situ joints,we can gei the conclusion:the fabricated joints have higher loading capacity and better ductility than the cast-in-situ joints.(2)The ANSYS software and PKPM software were used to analyze the modal shear wall structure.We can get 8 stages of frequency and period of the structure.The analysis results show that the basic period of the assembled shear wall structure is 2.094s.The error is less than 5%,when I use two softwares.(3)Through the response analysis of the assembled shear wall structure under the frequent earthquakes and rare earthquakes,we can get the horizontal displacement time history curve at the top in the X,Y direction,the interlayer drift angle,and horizontal shear force at the bottom of X,Y direction of 3-sided shear wall.According to the comparative analysis,it is found that the maximum and minimum horizontal displacements of the top of the shear walls in X and Y directions differ by more than 20%,and the difference of the horizontal shear force in the X direction at the bottom of each shear wall is about 50%,the difference of horizontal shear in Y direction is small,and the drift angles meet the standard limit.(4)In this paper,orthogonal design was carried out for three factors including span-depth ratio of cross beams,length-thickness ratio of shear wall,and length of continuous beam.Using the displacement of one of the shear walls and the shear force at the bottom as index,Seismic response analysis under the action of earthquake and analysis of the impact of various factors on the structure.The analysis results show that under the frequent earthquake,when the displacement of the top of the shear wall is taken as the index of investigation,the span-depth ratio of cross beams is 4.5,the length-thickness ratio of shear wall is 8.75,the length of continuous beam is 0.9m,this combination is optimal.Under the rare earthquake,the span-depth ratio of cross beams is 5.0,the length-thickness ratio of shear wall is 6.25,the length of continuous beam is 0.9m,this combination is optimal.When the force of the bottom of the shear wall is taken as the index of investigation,under the frequent earthquake when the displacement of the top of the shear wall is taken as the index of investigation,the span-depth ratio of cross beams is 3.5,the length-thickness ratio of shear wall is 7.5,the length of continuous beam is 0.9m,this combination is optimal.Under the rare earthquake,the span-depth ratio of cross beams is 3.5,the length-thickness ratio of shear wall is 7.5,the length of continuous beam is 0.9m,this combination is optimal.