| With the development of science and technology and the modernization of the society, the appeal of high-rise buildings has been improved, High-rise buildings should not only meet the functional requirements, but also brings people the enjoyment on the vision, tall towers conjoined structure is produced under this trend. A variety of architectural form and complex structure system to make this kind of structure design and analysis of more complex than the general high-rise building, therefore, how to design and analysis the conjoined high-rise structure efficiently and accurately and judge and evaluate the overall seismic performance of structures has become a new topic to be solved in this structural design industry currently. This paper mainly has the following several aspects of research work:The first chapter mainly introduces the research background, mechanical characteristics and engineering application of conjoined structure, summarizes the five kinds of common structure calculation model, describes the predecessors’ research work and contributions to this kind of structure.The second chapter mainly introduces the basic theory of finite element method and the simulation method of main components used by finite element software SAP2000, compared the difference and characteristics of Rubber Isolator and Friction Isolator in detail, and briefly summarized the commonly seismic design analysis methods, Mainly including the mode superposition response spectrum method, the dynamic time history analysis method and The static elastoplastic analysis method, emphasis on three ways at the core of the theory and characteristics in order to determine the analysis method which this paper adopted.The third chapter set up two models respectively used by finite element analysis software SAP2000. First of all, compares the common bearing connection scheme in detail through the mode-superposition response spectrum method, analysis of each advantages and disadvantages of connection scheme connection scheme, then select a optimal connection scheme to proceed to the next step. Secondly, research the dynamic characteristics of structure under severe earthquake through the modal analysis and the nonlinear dynamic time history analysis. Then focus on comparative analysis of the natural vibration, displacement response, acceleration response, Isolation bearing response and Shear stress distribution of the shear wall of two kinds of model, and get some rules which can reflect the nature of the two structures.The fourth chapter mainly analyze this two model through the static elastoplastic analysis method. Firstly, the basic theory and process of Pushover analysis method is introduced in detail,. Secondly, briefly explain the analysis process and the early stage of the parameter settings of Capacity spectrum method in SAP2000. Then the analysis of this two model in both directions are given by Pushover analysis by selecting appropriate load model, research the deformation of the structure and development of plastic hinge order under severe earthquake to get the structure performance point and failure mechanism under severe earthquake, and evaluate the seismic performance of buildings through the curve of Capacity spectrum and Demand spectrum. Finally, contrast the plastic development process and the change of the performance point location under different loading modes in order to come to the similarities and differences of various loading modes.The fifth chapter mainly come the summary of above analysis results and a conclusion with universality and guidance of future research. Finally do certain outlook of the future. |
