Behavior of semi-supported steel shear walls: Experimental and numerical simulations. (15th March 2017)

• Record Type: Journal Article
• Authors: Shekastehband, B.; Azaraxsh, A.A.; Showkati, H.; Pavir, A.
• Is Part Of: Engineering structures. Volume 135(2017:Mar. 15)
• Page Start: 161
• Page End: 176
• Publication Date: 2017-03-15
• Subjects: Semi-supported steel shear walls (SSSW) -- Ductility -- Finite element -- Cyclic loading -- Hysteresis -- Dissipated energy -- Slenderness ratio; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2017.01.004
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Seismic behavior of semi-supported steel shear walls (SSSWs) was studied experimentally. Two plate thicknesses and four different circular opening ratios were considered. Bearing fracture of the infill plate and bolts in connections was observed in the solid specimens. Strength of 0.5 mm and 1.25 mm thickness perforated panels decreased by 42% and 28%, respectively. Energy loss of perforated panels of 0.5 mm and 1.25 mm thickness, was 57% and 43%, respectively. Abstract: This paper presents an experimental and numerical study of semi-supported steel plate shear walls which are connected to frame beams and a pair of secondary columns. As the infill plates are not connected to the frame primary columns, the large stresses due to tension field, causing the formation of plastic hinges in the primary columns, are avoided. In order to intensively investigate the structural mechanism of this new type of shear walls, eight specimens were tested under reversed cyclic lateral load. The effects of four perforation diameters as well as two slenderness ratios of infill plates on the seismic behavior of SSSWs were studied experimentally and numerically. All the specimens exhibited satisfactory cyclic inelastic and energy dissipation, thereby indicating an alternative to traditional steel shear walls. Based on the test results, the strength, stiffness, ductility factor and energy absorption characteristics of the specimens were substantially reduced in specimens with openings. Maximum strength reduction, stiffness loss and ductility deterioration in the perforated specimens were 42%, 61%, and 33%, respectively. Deteriorating pinched hysteresis was observed due to the occurrence of cyclic out-of-plane buckling and tension field action. In addition to the test program, complex elastoplastic FE models of the eight specimens were developed to investigate in detail the cyclic behavior of semi-supported steel plate shear walls. Excellent agreement was observed between the experimental and numerical results.