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Experimental and numerical study on seismic behavior of LYS and HYS steel plate shear walls connected to frame beams only

Shekastehband B., Azaraxsh A., Showkati H.

Archives of Civil and Mechanical Engineering

2017

Vol. 17, no. 1

154--168

This paper presents an experimental and numerical investigation on the steel plate shear walls with beam-only-connected web plates (SSW-BO). These systems feature an alternative to the traditional type of steel shear walls through separating the lateral load resisting system from the primary columns. A possible drawback of SSW-BO is its reduced shear capacity compared with fully-connected web plates. High yield strength (HYS) web plate may develop shear capacity of these systems. The seismic behavior of the SSW-BO systems are experimentally investigated under cyclic quasi-static loading and compared considering two material properties and two different circular opening ratios. Shear strength, ductility, and energy dissipation capacity of HYS panels are higher than those of low yield strength (LYS) panels by as much as roughly 70%, 10% and 30%, respectively. The use of HYS web plates in SSW-BO systems appeared to be a promising solution to compensate the concerns regarding the low shear capacity and low energy dissipation resulting from separation steel plate from the columns. Moreover, the finite element software ABAQUS was used to investigate the behavior of SSW-BO systems by nonlinear analysis. A comparison between the experimental and numerical results showed excellent agreement.

Experimental study on the cyclic behavior of perforated CFRP strengthened steel shear walls

Sahebjam A., Showkati H.

Archives of Civil and Mechanical Engineering

2016

Vol. 16, no. 3

365--379

In this study, the behavior of perforated carbon fiber reinforced polymer–steel composite shear walls under a quasi-static cyclic loading was investigated. Four single-story and single-bay specimens were manufactured with an aspect ratio of 1.33: a simple perforated steel shear wall as a reference model and three perforated composite shear walls. The composite specimens differed in their fiber directions. All specimens had a regular staggered pattern of circular openings. Parametric studies on the stiffness, load-carrying capacity, and ductility were carried out using hysteresis curves. As a detailed new study the strain on the infill panel and buckling waves were also monitored. All the fiber directions were found to considerably affect the stress distribution and tension field direction. While, hysteresis curves indicated that orienting the fibers along the tension field considerably affected the curves and the above parameters, but the effect of fiber orientations in the horizontal and vertical was negligible.