Study On Seismic Performance Of A Steel Plate Gangue Concrete Composite Shear Wall

Due to the stress and deformation characteristics of high-rise building itself,the seismic and wind resistance are the primary consideration in design.In the introduction of efficient building structure energy component to resist lateral force and adopt good vibration resistance structure can improve the seismic performance of structure system,realize the principle of seismic design of three levels.In this document,a new type of composite shear wall,referred to as a steel plate gangue concrete composite shear wall,is proposed.The proposed wall consists of a reinforced gangue concrete wall and an encased steel plate.The steel plate,as the main anti-lateral force component,increases the structural rigidity and reduces the horizontal displacement of the structure through its shear resistance level load.At the same time,the gangue concrete wall is designed to prevent steel plate buckling.Due to the complex mechanical properties of the structure and the limitation of lightweight aggregate concrete materials,the existing research work is more fragmented.Based on the finite element software ABAQUS,the calculation model of this component is established,and its mechanical properties and seismic performance are analyzed and studied under different parameters.The main contents are as follows:An FE model was first established in ABAQUS for steel plate gangue concrete composite shear wall.The FE model was substantiated and improved using experiment results(load-displacement curves and failure mode)from existing literature.Numerical simulation of the specimens with different axial compression ratio,height-to-width ratio and height-to-thickness ratio of steel plates were analyzed.The load-displacement curve,stiffness and strength degradation,ductility and energy dissipation of the components under different parameters were compared.The results showed that the hysteresis curve of the components was full and had a slight pinching effect.With the increase in the height-to-width ratio,the axial compression ratio,and the height-to-thickness,the ductility and energy dissipation capacity of the composite shear wall became increasingly more significant.In actual engineering,the steel plate concrete composite shear wall worked with the edge frame to form an anti-lateral force system.The edge frame assumed some horizontal load,which affected the performance of shear wall.In this document,ABAQUS software was used to build a steel frame with steel-plate-encased reinforced gangue concrete composite shear wall model.The influence of axial compression ratio,frame column stiffness and height-to-width ratio of steel plate seam on seismic performance was further analyzed.The results showed that steel frame with steel plate gangue concrete composite shear wall has the larger bearing capacity and initial stiffness,full hysteresis loop curve,and superior ductility and energy dissipation;In the same situation,with the increase of axial compression ratio and stiffness of frame column,decrease height-to-width ratio of steel plate seam,the bearing capacity,initial stiffness and seismic performance of the composite shear wall can be improved greatly.Combined with the FE simulation results,a restoring force curve model of steel plate gangue concrete composite shear wall without and with frame was simulated by four linear model of the skeleton curve.Finally compared with the test data,the results showed that the proposed simplified calculation model of restoring force can be applied to seismic study of steel plate concrete composite shear wall.