Static And Dynamic Analysis And Research On Siamese High - Rise Building Structure

With the using requirement of high-rise buildings functions becoming more complex, the new forms of building structures are emerging. High-rise buildings with twin towers is one of the new structural forms in this development.This paper is based on the Jingdong Hotel and Office integrated project of Guiyang City. The Project is consist of two parts, a hotel building and an Office building. The two buildings are combined by a high position steel reinforced concrete truss connective structure, which makes the whole structure a complex out-of-code high-rise building with twin towers.ETABS has been used to analyze the model. Three different kinds of connective structures have been compared in the analysis, which are open web truss, truss with plate-web and composite truss. Full models has been made and static analysis on inner force and displacement has been done. The result shows that composite truss has the best mechanical properties.Response spectrum analysis and elastic time-history analysis on composite truss scheme have been conducted. The result show that composite truss helps increase the stiffness and decrease the period of the structure. The free vibration mode of asymmetry connective structure is not a vibration of a single direction, instead of which, the mode is of varies of directions and the lateral-torsional coupling vibration is remarkable. With the comparison of structures with and without connective structure, the maximum displacement and shear of stories shows that the connective structure can coordinate the deformation of twin towers and increase the shear of the first story significantly, which is a main factor in designing. The change of acceleration time history of measuring points at bearing and middle span of connective structure shows that measuring points at bearing have a larger acceleration time history that the seismic wave input, which requires integral modeling analysis. The acceleration time history of measuring points at the middle span of connective structure increase significantly, under vertical seismic load, compared to the acceleration input. It indicates that the vertical seismic load has a remarkable effect on the connective structure which cannot be ignored.