Study On Seismic Behavior Of Composite Steel Plate Coupled Wall

Composite steel plate coupled wall(CSCW)is a new structural system composed of steel coupling beam and composite steel plate shear wall.It combines the advantages of high plastic deformability of steel coupling beam and large lateral stiffness of composite steel plate shear wall,meeting the super high-rise buildings' requirements of high axial compression ratio,high ductility and excellent energy dissipation capacity as small wall thickness as possible.In order to acquire a better understanding of the CSCW structural system,this paper investigates the influence of the parameters that have a great influence on the structural design on the seismic performance and mainly focuses on the following aspects :(1)Based on the performance goal of coupling beam-wall pier dual defense mechanism,adopting calculation method of rigid-zoned frame for CSCW to investigate the realization of “coupling beam-wall pier dual defense mechanism”.(2)Based on the specimens of the team and taken axial compression ratio and ratio of flexure to shear of steel coupling beam as parameters,two scaled CSCW specimens were designed,manufactured and then tested under reversed cyclic lateral load and constant axial load.The behaviors of the test specimens,including failure mode,hysteretic response,ductility,stiffness degradation characteristic,energy dissipation capacity and shear deformation of steel coupling beam,were examined to study the seismic performance of CSCW structural system and the influence of axial compression ratio and ratio of flexure to shear of steel coupling beam on seismic performance of CSCW structural system.(3)Adopted finite element analysis software ABAQUS to simulate the test and then compared the simulated results with experimental data,analyzing comprehensively hysteretic curves,skeleton curves and failure mode.The experimental results and analysis shows that the CSCW has excellent seismic behavior.The yielding mechanism that steel coupling beams yield prior to wall piers is realized by adopting calculation method of rigid-zoned frame.The axial compression ratio has little influence on latera load carrying capacity,stiffness and energy dissipation capacity,but the ductility decreases with the increase of axial compression ratio.Ratio of flexure to shear of steel coupling beam have no obvious influence on latera load carrying capacity,but energy dissipation capacity will increase with the increasing of ratio of flexure to shear of steel coupling beam.Before the peak load,ratio of flexure to shear of steel coupling beam decreases and the yield displacement and peak displacement increase;After the peak stage,the latera load carrying capacity of the specimens with a smaller ratio of flexure to shear of steel coupling beam drops faster and its stiffness degrades faster as well.The hysteretic loops and skeleton curve simulated by finite element analysis software ABAQUS and experimental ones show good agreement for the specimens,which further validates the reliability of the test results and the finite element numerical model and analytical method.