INFLUENCE OF VERTICAL LOAD ON SHEAR PERFORMANCE OF BUCKLING-RESTRAINED COMPOSITE STEEL PLATE SHEAR WALL

Two finite element models of buckling-restrained composite steel plate shear wall (BR-CSPW) named as BR-CSPWⅠand BR-CSPWⅡ were constructed with the consideration of infill steel plate bearing vertical load． The difference between two models is the concrete plate and steel plate work together to bear vertical load in BR-CSPWⅡ．ABAQUS was used to conduct the analysis for the influence of vertical load on shear performance，stress distribution of infill steel plate and damage of concrete plate of BR-CSPW． Experimental studies on 2 shear wall specimens were carried out under cyclic lateral load． Analysis results show that with increasing of vertical load，the interaction between concrete plate and steel plate is enhanced and the damage of concrete plate is getting worse． The shear bearing capacity，initial stiffness and energy dissipation capacity of BR-CSPW will not decrease significantly under vertical load if the concrete plate is properly designed and detailed to provide sufficient out-of-plane restraining for steel plate． Under the action of vertical load，the bending capacity of boundary column is reduced for bearing more pressure．