TESTS AND ANALYSES OF LARGE SCASLE STEEL PLATE SHEAR WALLSCONSTRUCTED WITH BUCKLING RESTRAINERS

摘要

Steel panel shear walls (SPSWs) have the advantage of using a small amount of steel while achieving significantrnlateral stiffness to resist horizontal earthquake forces. However, under lateral forces SPSWs constructed withoutrnany stiffeners suffer from: pronounced buckling sounds, large out-of-plane displacement and a pinched forcernversus deformation hysteretic responses. This research investigates the effects of restrainers in improving thernserviceability and enhancing the energy dissipating capacity of the SPSWs. Tests confirmed that the restrainersrncan be conveniently designed using the proposed method. The effect of the restrainers on the ultimate shearrnstrength of SPSWs is negligible. Thus, it does not increase the demands on the size of the boundary members.rnTest results show that restrainers decrease the occurrence and loudness of the buckling sounds, effectivelyrnmitigate the out-of-plane displacement and increase the energy dissipation capacity of the SPSWs. This researchrnalso describes the analytical results of using various finite element programs, including PISA3D, SAP2000 andrnABAQUS. Analytical results show that the simplified strip model can predict the overall stiffness and strength ofrnthe SPSW specimens. The equivalent brace (EB) model can satisfactorily predict the initial stiffness and thernyield strength of the SPSW restrained by steel tubes. Finally, the cyclic buckling responses and the force versusrndeformation relationships of the SPSWs can be accurately simulated using a tri-linear material and shell elementrnmodel in the ABAQUS analysis.