Study On Structural System Selection And Seismic Performance Of Twin Tower Connected Structure

The rapid development of science and technology has led to the development of various industries,and the construction industry is no exception.Today,on the basis of satisfying the basic requirements of people,the structural forms of buildings tend to be more complicated and diversified,while the conjoined structures of high-rise buildings are fully utilized because of their grandeur.The advantages such as strong impact on visual senses have been widely concerned and applied.Due to the existence of connectors,the double tower structure is much more complicated than the single tower structure,and it is prone to problems such as failure and uncoordinated deformation under seismic action.In this paper,the type selection and seismic performance of double-tower conjoined structures are studied,and it is hoped that this study can provide useful reference for similar designs.The main research work is as follows:1.Based on the structure of the double tower,considering the different stiffness of the two side tower bodies,the changes in the different connection modes and different connection positions of the connecting bodies,and other parameters,a different finite element model of the structure of the double tower structure is established,and the selfvibration characteristics and seismic response of the overall structure are systematically studied.The effects of the above parameters on the top layer displacement,the maximum interlayer displacement angle and the basement shear force of the double tower structure are obtained.The results show that the different connections and stiffness have little effect on the seismic performance of the double tower conjoined structure.When the position of the connector is in the middle,it has a strong binding effect on the overall structure.2.Based on the structure of the double tower,considering the different stiffness of the two side towers,the effect of different connection modes and different connection positions on the internal force distribution of the structure itself,the internal force of the key bar parts,and the bending moment of the constraint end,the shear force and other effects are systematically studied.The effects of different parameters on the mechanical properties of the connectors are obtained.The results show that the shaft force of the oblique-bellied bar is the smallest,and the bending moment and shear force of the column of the adjacent frame are the largest.Although this method can reduce the stress of the conjoined body,but increase the force of the two sides of the tower body,so in the design,flexible connection can be used to reduce the impact of the connecting body on the tower body.3.Based on the typical engineering examples,considering the various seismic effects,the dynamic characteristics and seismic response of the single tower structure and the double tower structure are compared and analyzed,and the effect of the connecting body on the structure of the double tower structure is summarized.The results show that although the existence of the connecting body can coordinate the deformation of the two towers and increase the overall stiffness,it only increases the stiffness in the X-direction plane,and the Y-direction stiffness does not increase.Therefore,the Y-direction stiffness of the double-tower conjoined structure should be appropriately increased in the design.