Optimization Of Shear Wall Structure And Seismic Performance Research

SRCW is one of the tactic forms of high-rise buildings,which has good lateral force resistance,so it is very widely used in high-rise buildings.At present,in the structural design,the number of walls in the shear wall system is large,which will make the structural stiffness large,so there is not conducive to saving the engineering cost.Therefore,the optimization of the shear wall is a very meaningful work.In this thesis,the model of high-rise shear wall structure system is built by ANSYS software,and replacing shear walls in different numbers and different positions with three different schemes.Dynamic response analysis,The main research contents and conclusions of this thesis are as follows:(1)For three schemes,After loading three seismic waves with different acceleration peaks,get the maximum level displacement of the whoie fabric.Under the action of the Nanjing wave load with a peak acceleration of 400cm/s~2,the maximum displacement of the top of the structure is 0.228057 m,The maximum displacement under this seismic wave was increased by 3.25% and 4.76% compared with Scheme 1,respectively.It is explained that schemes 2 and 3,after replaced with different numbers of shear walls in different positions,the structural stiffness has changed,thus increasing the displacement of the structure,but the displacement values are within the allowable range and are closer to the limit,so that the materials in the structure are fully used.(2)Loading the seismic wave on the three schemes,the three schemes obtain a highly varying acceleration curve,among which the Nanjing wave with an acceleration peak of400cm/s~2 has the most obvious impact on the structure.Compared with scheme 2 and scheme 3 under the action of this seismic wave,and increased by 3.25% and 4.76%respectively.After the structural optimization,the magnification of the acceleration after the structure changes,indicating that the replacement of the shear wall in different quantity and location has impact on the property of the overall structure.(3)by comparing the acceleration of the three schemes.It can be seen from the inter-story displacement curves under the action of three seismic waves with peak value of70cm/s~2 that after structural optimization,Compared with scheme 1,the interlayer displacement angles of scheme 2 and scheme 3 are increased.in which the interlayer displacement angle of scheme 3 is closer to the limit,indicating that the structure becomes more reasonable after the optimization.(4)Analyze the connection nodes replaced by masonry wall in layer 17 floors with the largest structural displacement angle in Scheme 2 and Scheme 3,By analysis,Nodes684 and nodes 31921 with the largest displacement difference of the two components connected by the nodes were selected for further study,Compast the displacement time curves of the optimization scheme and the two nodes in the firsthand pian,The results show that The displacement time curve of node 684 before and after optimization shows consistency at the same time,Note that the node 684 is not broken;Node 31921 is not fully consistent at the same time,It indicates that node 31921 may cause damage during an earthquake.