Document Type : Original Article
Authors
1
Ph.D. Student in Structural Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
2
Professor, Faculty of Engineering, Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
3
Assistant Professor, Faculty of Engineering, Department of Civil Engineering, Shahab-Danesh University, Qom, Iran
10.22065/jsce.2023.407319.3171
Abstract
In this research, he experimental findings of the behavior of self-centered coupled shear wall system, in which TADAS metal dampers are used at the beam-to-wall connection area, are evaluated and confirmed using OpenSees software. In order to prevent the possible failure of the beam, as well as to maintain the self-centering capability of the system and to minimize the residual deformation of the structure under seismic load, steel beams and PT strands have been used in the construction of subassemblies. To carry out the laboratory work, three subassemblies were made of the self-centered coupled wall system and subjected to quasi-static cyclic loading. The investigated samples included a subassembly without energy dissipation devices and two subassemblies equipped with TADAS dampers at the beam-to-wall connection area. The subassemblies were modeled using OpenSees software and the results showed a good agreement with the laboratory results. In the samples with TADAS dampers, the effect of the thickness of the triangular plates of the damper, as well as the effect of the initial tension of the pullback strands was investigated. The experimental and analytical studies of the subassemblies showed that the use of TADAS dampers at the region where the beam and wall are connected, while significantly reducing permanent deformations, led to an increase of 71% to 96% in the carrying capacity of the system and a significant increase in the energy dissipation capacity. Also, by increasing the thickness of the damper blades from 12 to 15 mm, the loading capacity increased by about 15%, while less residual deformation was observed in the subassemblies.
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