Research On Structural Type Selection And Arrangement And Optimal Quantity Of Shear Wall In Tall Building Structures

Recently, with the farther development of economy and the continuous progress of technology, the development speed of tall building structures increases year by year. The center of tall buildings is transferring to Asia and China. In our country, tall buildings are developing rapidly, the height is increasing continuously, the function and the style are becoming complex more and more, the structural systems are becoming more various, and the region distributing is broader.Conceptual design has the fateful effect on the structural earthquake-resistant performance, and type selection and arrangement of structures in tall buildings take the important action during the earthquake-resistant design, which effect on the structural security and economy. The optimal quantity of shear wall in tall building structures is the key problem in the structural security and economy.Type selection and arrangement of tall building structures have been studied. Torsion effect has been analyzed. Optimal quantity of shear wall in shear wall frame structures has been discussed. Main completed work is in the following:1. Base on the general summary of the various structural system behaviors, selection of structural types is introduced, which contains vertical bearing structures, horizontal bearing structures and foundations. A 20-story tall building structure is taken for an example to discuss the influence of the vertical structural types on the behaviors of tall building structures by respectively adopting frame structure and frame-shear wall structure.2. The structural arrangement contains plane arrangement, vertical arrangement and the set of joints. A regular building structure and an irregular one are taken for examples to discuss the influence of the structural arrangement on the behaviors of tall building structures. 3. The influence of arrangement of the anti-sideways elements on the structural tor- sion was discussed. The formula of structural torsion stiffness was given. The method to decrease the structural torsion effect was found. It is shown that the torsion stiffness of elements take the small proportion of the total structural torsion stiffness during the el- asticity phases. The structural torsion stiffness will increase when the structure is taller and the column section ration of height to width is smaller. The torsion effect of tall bui -lding structures can be controlled by decreasing the moment of torsion and increasing the structural torsion stiffness in practice engineering.4. Based on the principle of continuous analysis of interactive frame-shear wall structures and the current Chinese code for seismic design of buildings, a series of formulas are deduced strictly from the allowable horizontal rotation. Furthermore, the figures that show the optimal quantity of shear wall under various ground categories, anti-earthquake grades and design groups are given, and some kinds of influence factors are discussed. This method is proved that it is accurate and convenient enough for use...