The Research Of Optimization Of Tall Building's Shear Wall Structure

In recent years, the shear wall structure has been widely used in the field of modern tall buildings. Especially in large and medium cities.《Technical specification for concrete structures of tall building》has made some provision to shear wall's design principles,calculation methods and construction measures, but not particular enough or lack of feasibility, Nowadays in project practice, most of the layout of shear wall is mainly depended on the designers' experience. most of the layout of shear wall is mainly depended on the designers' experience. the shear wall structure's quantity and layout is an important factor in influencing the safety and economic of the shear wall structure of large space at low part. If the quantity of shear wall linked with the ground is too small, it is unable to meet security and the application needs because of the lateral deformation; conversely, it will affect the application needs of the building and increase the amount of materials. Therefore, it is very necessary to carry on the suitable optimization to the shear wall structure arrangement.In this paper, we analyzed some a tall building's shear wall structure in Qingdao, adopting our country's current structure calculation software SATWE to model and analysis, studying the structure's dynamic characters, deformation, internal force characters and structure measures to optimize the structure. And we also contrasted the optimized structure's performance and efficiency to the original one's. we could come to the following conclusions:1.the structure's rigidity has been more reasonable because we had changed some "一"type shear walls into"T"or"L"type ones ,the horizontal displacement and story drift angle of the structure top has been reduced,the structure is more economic and the structure's integral rigidity has been improved.2.The structure has stronger seismic capacity because of the more shear wall.but earthquake force will increase because of the stiffness and cycle too bigger, which not only increase the material of higher structure but bring forth the difficult of foundation design.3.The layout of shear walls should uniform,dispersion,symmetric and peripheral.The shear wall should set to the axis of beam and column, and shear walls set in two directions,and the quantities are basic approach for the cycle of two directions close.