The Research On Reasonable Quantity Of Shear Walls In Tall Shear Wall Structures

With the development of economy and the progress of technology, tall buildings are rapidly developing. The height is increased continuously and the styles becomes complex more and more. As one of the main forms of tall buildings, shear-wall structure has been widely applied in high-rise residential and hotel buildings in non-seismic area and seismic zone and in recent years because of its overall good lateral rigidity, and small displacement under the horizontal load, large bearing capacity and the smooth surface of walls. Usually,excessive shear-walls are set in the practical engineerings for the reasons of safety. Their bearings capacity can't be fully utilized and it is not economic design. The reasonable quantity of shear-walls in tall Shear-wall structures has been studied in this thesis. The main contents are as followings:1. According to the rate of openings and the overall coefficient, the shear wall structure were classified. The characteristics of the corresponding force was analyzed. By using the approach in the mechanics of materials and continuous methodology, the methods for calculating the internal force and displacement in the different types of shear-wall structures are presented. According to the structures which had the wall- frame or not, made the shear-wall structures for calculating in two types.2. By using a commercial engineering software, an engineering example was calculated. A number of factors are analyzed in the arctile which impact on the lateral displacement and reasonable quantity of the structures, storey height, wall width, openings rate, concrete strength grade, seismic intensity and site classification etc. Some curves between the relationship in quantitative are gave in the text.3. The methods for the shear-wall structures'seismic design were discussed in the chapter based on the displacement ductility. The need and the importance for the reasonable amount of shear wall structure design based on the displacement limits and the ductility were illustrated.The idea that the story drift had more notable results of influence on the lateral members'quantity in shear wall structure than the sharp peak drift was put forward by the author.4. Taking the lateral rigidity of the shear wall as a design variable, the role of seismic as the objective function, the deformation, strength limitations as the constraints which were the geometry of tectonic stability constraints, the math model for walls'reasonable amount was established. The specific cross-section area of shear walls was been optimized by using the optimization method for the partial with the corresponding program in MATLAB on one-dimensional search and complex method .5. The effectiveness of the mothod to determine reasonable quantity was illustrated with an example, the results of the engineering were analyzed and compared,which showed the meet for the project's requirement.In a word, the reasearcher proposed that the preliminary conclusions in this arcticle had much significance of following-up research work to be done thoroughly.