Seismic Behavior And Design Of Composite Steej Plate Shear Walls

Steel-concrete composite shear walls have been widely used as major lateralforce-resistant components in high-rise buildings because of their high strength, goodductility and energy dissipation capacity. In this paper, seismic behavior of―Innovative‖composite steel plate shear wall (I-CSPW) and buckling-restrained composite steel plateshear wall (BR-CSPW) are investigated and compared. Performance-based method is usedto design a steel frame braced with BR-CSPW. In addition, shear performance of Doubleskin composite wall filled with high strength concrete (B-HCSW) is studied. The mainwork includes:1. The finite element models of I-CSPW and BR-CSPW have been established andvalidated by test results. Shear strength, stiffness and concrete damage of the compositewalls are investigated. Results indicate that increase in steel plate thickness decreases theconcrete plate damage in BR-CSPW, while in I-CSPW, concrete plate damage occursearlier and more seriously. Hence to restrain buckling of steel plate, thicker concrete plateshould be used in I-CSPW than in BR-CSPW.2. Performance-based method is used to design a steel frame braced with steel plateshear wall (SPW) and BR-CSPW respectively. Yield and failure mechanisms of SPW andBR-CSPW structure are checked and compared by pushover and nonlinear time-historyanalysis. It needs to be checked that shear yield of boundary beam web does not formbefore full plasticity in steel plate.3. Monotonic pushover analysis are performed to investigate key parametersinfluencing the shear performance of B-HCSW. The parameters are axial compressive ratio,shear span ratio, the ratio of the tie bar spacing to steel plate thickness, reinforcement ratio.The simplified formulation was proposed to evaluate the lateral load-carrying capacity ofthe double skin composite walls, which provided satisfactory predictions.