Experimental and numerical investigations on seismic behavior of stiffened corrugated steel plate shear walls

Abstract

AbstractStiffened corrugated steel plate shear walls (SCSPSWs) are novel seismic‐resistant members used in medium‐ and high‐rise building structures, in which a stiffener system is applied on the corrugated steel plate to restrain its out‐of‐plane buckling deformation. In this study, experimental and numerical investigations were conducted on the SCSPSW. Using a four‐bar linkage loading device, seven specimens were tested under low‐circle cyclic shear loads, including six SCSPSW specimens and one unstiffened corrugated steel plate shear wall (CSPSW) specimen. Five sets of comparisons were established among the seven specimens to study the effects of the sub‐panel aspect ratio, stiffener torsional constraint, plate‐stiffener connection method, bolt layout scheme and bolt strength on the seismic behavior of the SCSPSW. Desirable shear resistance capacities, ductility, and energy‐dissipating capacities were exhibited through the hysteretic curves. The test results confirmed the validity of existing design formulas for the ultimate shear resistance of the SCSPSW. Then, finite element (FE) models were developed and validated against the test results, indicating the accuracy of the models in simulating the seismic behavior of SCSPSWs. Based on the validated FE models, the internal tensile and shear forces of the connecting bolts were obtained. Accordingly, the development law of the bolt internal force was analyzed in detail. A calculation procedure for predicting the bolt internal forces was proposed and proved to be reasonable. Finally, the effect of stiffener strength on shear resistance and post‐buckling behavior of the SCSPSW was investigated numerically. The research results of this study can provide some references for the engineering practice of the SCSPSW.