Seismic Behavior Tests And Numerical Analyses Of Composite Shear Walls With Double Steel Plates And Infill Concrete

The shear wall is an obligato essential component of high-rise buildings.It is mainly used to resist the lateral force of the building.However the traditional reinforced concrete shear walls have the disadvantages of too much wet work,the thick wall and large construction cost that make it can not meet the requirements of green buildings and steel structure buildings encouraged by the state in 13 th Five-Year planning.The steel plate concrete composite shear wall(SCSW)can give full play to the advantages of concrete structures and steel structures and improve the defects of the traditional shear wall,so as to promote the deep integration of steel structure buildings,assembled buildings and green buildings.At present,composite shear wall composite shear walls with double steel plates and infill concrete(DSCSW)and with single steel plates(SSCSW)and infill concrete are two research directions.The research of SSCSW is more comprehensive than DSCSW.The research on the DSCSW is mainly focused on the overall shear performance and design methods,but the influence of seismic performance affected by the shear connectors is still lack of systematic study.Therefore,it is urgent to study the various properties of the DSCSW with shear connectors.The main research work of this paper is as follows:(1)The experimental tests of 4 DSCSW under the cyclic load were carried out.The stress mechanism,hysteretic behavior and failure modes of the DSCSW were researched.The horizontal load-displacement hysteretic curves and skeleton curves were drawn by the experimental results.The stiffness degradation,strength degradation,deformation capacity,energy disspation and ductility coefficient were evaluated in the subsequent.The working state of the composite shear wall steel plate and concrete was analyzed.(2)The finite element models of 4 experimental specimens were built by ABAQUS software.The hystereitic curves of experimental tests and skeleton curves of numerical results showed satisfactory agreement.The nonlinear whole process stress analysis was conducted,and the stress distribution of the specimen was studied.The finite element analysis model was also used to study the shear deformation of composite shear wall and the proportion of total shear deformation of composite shear wall was discussed.(3)The FEA model of full scale DSCSW under the axle load was built.The accuracy and rationality of the model was ensured by verified with the experiment results.A parametric analysis of the axial compression behavior of the DSCSW was conducted to study the effect of shear connector,steel strength,concrete strength,thickness of steel plate and other parameters on the DSCSW.The main influence parameters are obtained.(4)The FEA model of full scale DSCSW under the horizontal force with axial compression ratio was built.A parametric analysis of the axial compression behavior of the DSCSW was conducted to study the effect of shear connector,steel strength,concrete strength,thickness of steel plate and other parameters on the DSCSW.The main influence parameters are obtained.