Experimental And Theoretical Studies On Composite Steel Plate Shear Walls

The composite steel plate shear wall(CPSW) is a new kind of bracing used in tall buildings. The steel plate plays an important role in resisting the lateral forces. The concrete panels supplies lateral restraint to steel plate to enhance the lateral stability of the steel plate and hence increases the lateral force resisting capacity of the CSPW.This paper focus on aseismic behavior and analysis method of 2side-CSPW. The 2side-CSPW can mitigate the adverse effect on columns due to steel plate without the connection to columns and reduce construction quantity. Experimental studies including one monotonic loading test of 2side-CSPW with one concrete slab, two cyclic loading tests of 2side-CSPW with two concrete slabs and one cyclic loading test of 4side-CSPW with two concrete slabs have been carried on. The research discovers that the 2side-CSPW tends to buckling outward without buckling restrains and have steady hysteresis behavior with strong buckling restrains. Also the work reveals that the thickness of the concrete slab is a key factor on the performance of CSPW.The four-node elasto-plastic shell element (shell181) of compute program Ansys is adopted in pushover analysis of the 2side-CSPW. The model takes geometry initial deficiency into account using modal consistency deficiency. The initial stiffness results is larger than experimental results but shear resistance capacity fit well. Furthermore a compound-strut model is brought forth to simulate limited stability problem and combined with strip model which is suitable for steel plate shear wall to form a new simplified model for CSPW. The new model has been verified though parameter studies and compared with experimental results.