Theoretical And Experimental Study On Design Methods For Steel Corrugated Plate Shear Walls

Steel corrugated plate shear walls(SCPSWs)could be utilized in high-rise building structures,not only as lateral force resisting systems,but also as energy-dissipating devices to absorb energy under severe earthquake effects.This paper proposes three innovative types of SCPSWs and performs the investigations on their elastic buckling,load resistance and hysteretic behaviors.The first type is the vertically stiffened corrugated plate shear wall(VSCPSW).It is composed of an ordinary SCPSW stiffened with vertical stiffeners,and the infilled wall and stiffeners are connected with high-strength bolts.The stiffeners could well restrain the out-of-plane deflection of the infilled plate,thus improving its shear resistance and hysteretic behavior.The second type is the double-corrugated-plate shear wall(DCPSW)composed of two identical corrugated plates.The two corrugated plates are installed in a parallel pattern and they contact with each other at their corrugation valleys.By assembling these two corrugated plates with high-strength bolts installed at the valley regions of the corrugations,a closed-sectional construction is formed.Hence,the shear resistant behavior could be remarkably improved.The third type is the orthogonal double-corrugated-plate shear wall(ODCPSW)composed of two identical corrugated plates installed in an orthogonal pattern.Similarly,high-strength bolts are installed to connect the corrugated plates at the corrugation valley regions where these two corrugated plates contact with each other.Since the strong axis of one corrugated plate is coincide with the weak axis of the other corrugated plate,the flexural rigidity of each corrugated plate in its weak axis could be effectively enlarged,thus improving its shear resistant behavior.Firstly,based on the classical elastic theory of the orthotropic plates,the formulas of shear elastic buckling loads of orthotropic plates are derived,which are applicable for the elastic buckling analysis of different types of SCPSWs.Based on large deflection theory,the elastic post-buckling shear resistance of orthotropic plates is derived,and the theoretical results are validated by the finite element(FE)simulations of elastic models with different initial geometrical imperfections.Secondly,the three innovative types of SCPSWs,including VSCPSWs,DCPSWs and ODCPSWs,are respectively studied by means of both theoretical analysis and FE numerical simulation.During investigations of each of the three innovative types of SCPSWs,the following aspects are considered:(1)the formulas of the rigidity constants are theoretically derived and their accuracy is validated via FE numerical analyses;(2)the shear elastic buckling behavior is investigated to obtain the formulas for calculation of the shear elastic buckling loads,and correspondingly,the normalized aspect ratio is defined to be utilized as a key parameter for prediction of the shear resistance;(3)the shear resistant behavior is investigated by changing the geometrical parameters via FE simulations,and the formulas for calculation of the ultimate shear resistance are obtained from numerical results of FE models;(4)the hysteretic behavior is investigated by changing the geometrical parameters via FE simulations.Finally,the tests of six DCPSW specimens under monotonic and hysteretic shear loads are respectively conducted.By comparing the test results and the FE simulations,the validity of the FE models could be proved.Additionally,design recommendations for DCPSWs are presented based on the failure mechanisms of the test specimens,which could provide valuable references for practical engineering designs of DCPSWs.