The Nonlinear FEM Analysis Of Seismic Behavior Of Steel Frame-composite Shear Wall

In the design of the high-rise and super high-rise buildings, the selection of the lateralresisting system is of great importance. The composite shear wall, which is developed from theordinary steel plate shear wall, is proved to be an excellent lateral resisting component by theexperimental research at home and abroad. Similar to the ordinary steel plate shear wall, thecomposite shear wall has a stronger lateral stiffness and stable energy dissipation than thereinforced concrete shear wall, whose self-weight is lighter and thickness is thinner; it can alsoovercome the disadvantage of the ordinary steel plate shear wall, which can take full advantageof the post-buckling strength of the infill steel plate. The composite shear wall also has a bettercapacity of fireproof and heat insulation.The composite shear wall has gain acceptance of scholars by its excellent seismic behavior.The researches abroad have made some achievements. Few domestic scholars have conductsome test on it as well, but the tests are confined to the property of the structure itself, whichlacks the research on the interaction between composite shear wall and steel frame. As variousnonlinear problems are involved for the structure bearing lateral load and the influences on thestructural performance are many and varied, the research on the composite shear wall is farfrom the mature stage.Complicated contact relation exists between the infill steel plate and the concrete coverplate, and the strength of the steel plate after buckling is nonlinear and uncertainty. To solvethese problems, a model of finite element analysis was established with the general simulationsoftware-ABAQUS as the platform, and simulation tests under monotonic and cyclic loadingswere conducted. Comparing with the existing test, the ultimate bearing capacity and elasticlateral stiffness of the finite element model is close to that of the test specimen, which had smallerrors. The hysteretic curves of both model and specimen were very full, which shows theoutstanding energy-dissipating capacity of the steel frame composite shear wall. Overall, thefinite element model could truly simulate the bearing behavior of the composite wall undercyclic loading, which demonstrated that the model could be used for numerical analysis.Based on the verified model, the BASE model for parameter analysis was built.8parameters, namely cover board number, bolt number, bar ratio, board thickness, cover board strength, height to thickness of steel plate, partially-restrained, steel strength, were selected tostudy the change rule of the structural performance, and8sets16model were built. Accordingto the computation of these models, the mechanical behavior of composite wall was studiedsystematically, and many helpful conclusions were got.