| Composite structure of multi-ribbed composite walls and shear walls is a new kind of lateral resistant structural. This kind of structure has many advantages of multi-ribbed slab structure (MRSS); moreover, its lateral resistant system and seismic performances are improved by adding R.C shear walls substituting some multi-ribbed composite walls. Based on the pervious study, the dissertation is devoted to two aspects of the co-operative action principle and nonlinear analysis model of the multi-ribbed composite wall-shear wall structure (MRCWSWS) by using analytic solutions and numerical solutions. The analytical method of coordination between the multi-ribbed composite wall and the shear wall, the optimization method for shear wall's lateral stiffness and nonlinear performance of MRCWSWS under horizontal earthquake are studied. Some fundamental works have been done for seismic design method and construction measure of MRCWSWS. The main studied is as follows:(1) According to the requirements of design specifications, the co-operative action performance of MRCWSWS is studied. Adopting reasonable assumption, calculating diagram of the composite structure is published, and the co-operative action of multi-ribbed composite walls and shear walls is analyzed. With deep analysis, the internal force distribution and deformation capacity of MRCWSWS is presented.(2) Based on the principle of energy analysis of interactive MRCWSWS and the theory about response spectra in the current Chinese code for seismic design of buildings, the optimal model of MRCWSWS is established. The research shows that with the structural earthquake force of the structure as objective functions and the maximum drift angle as the restriction functions, the stiffness of shear wall is reasonable when the earthquake force reach minimum under the given story drift angle limitation. For the more, this model can reflect some influence factors of shear wall's reasonable stiffness, such as the height and the weight of the structure, anti-earthquake grades, site classification and design characteristic periods.(3) Based on the optimal model, an example is computed using Matlab programming. Combine with the example, the influence factors to the reasonable stiffness of shear wall in MRCWSWS, such as the stiffness of connecting beam between multi-ribbed composite walls and shear walls and the shear deformation of the shear wall are discussed. The reasonable stiffness of shear wall with different site classification, anti-earthquake grades and design characteristic periods are compared. Finally, the problem of the arrangement of shear wall in the structure is discussed.(4) Based on the previous experiments, engineering mechanism and deformation character of multi-ribbed composite wall in high-rise structure is analyzed. And a macro calculation model of MRSS is presented, which combined with multi-vertical-line model of shear wall.(5) Link element in SAP is adopted in the macro model of MRCWSWS. The element stiffness matrix and mechanical parameters of Link element is deduced. The hysteretic model and feature point of multi-ribbed composite wall and shear wall is investigated. It shows that the macro mode can better simulate the load-bearing and deformation characteristic of MRCWSWS in the analysis.(6) By using finite element program (SAP2000), the nonlinear analysis of MRCWSWS under horizontal earthquakes is presented. Nonlinear static analysis is used into seismic capability assessment of MRCWSWS. Nonlinear time-history analysis is used into study the deformation characteristic of MRCWSWS under different earthquakes.(7) Based on the analytic solutions and numerical solutions of MRCWSWS, the practical design methods, calculation method and construction measure of MRCWSWS is put forward, by comparing the multi-ribbed composite wall with the conventional structure—frame structure, shear wall structure, etc.The originality of this dissertation lies in:(1) Based on the energy principle, the deformation equation of MRCWSWS is derived.On the basis of the energy principle, a system energy equation for the rigid connection system of MRCWSWS considering shearing deformation and axial deformation of the wall is established. Firstly, Timoshenko-beam theory is adopted to take the effect of the shear deformation on bending strain energy of coupling beam into consideration. Then, the constraint equations of structure are established by using equilibrium conditions of the shearing force, and the equilibrium differential equation of structure is established with the aid of auxiliary functions and variational principle. Finally, the displacement and internal force solution of structure can be obtained.(2) The optimum design method for the stiffness of shear wall in MRCWSWS is brought out.Based on the quantified analysis on collaborative work of MRCWSWS and response spectrum theory in the current Chinese code for seismic design of buildings, the optimal model of MRCWSWS is established, and the problems needing attention in the arrangement of shear walls are discussed. The analysis shows that when taking the structural earthquake action and the maximum drift angle as the objective functions and the restriction functions, respectively, the quantity of shear wall under the minimum structural earthquake action is optimal.(3 ) A nonlinear macro model of MRCWSWS is put forward.According to the previous experiments results, a macro model of structure calculation for multi-ribbed composite wall structures is presented, which can be combined with multi-vertical-line Model of shear wall to analyze MRCWSWS as a macro model. The Link element in SAP2000 is used to simulate the model, and the element stiffness matrix of Link element is deduced. At the same time, the defining method is developed to determine the location of the shear spring. Through combing the hysteretic model of multi-ribbed composite walls and shear walls, the force-displacement relationship of different connection elements in Link element is derived. Moreover, based on the model, the nonlinear analysis of the MRCWSWS is performed.
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