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Strength, stiffness, ductility, and dissipated energy reduction of semisupported steel shear walls (SSSW) due to a circular opening
Semisupported steel shear walls (SSSWs) with web plates that are only connected to the beams were proposed as a means of mitigating column demands. In this research, equations for evaluating the reduction factors of performance characteristics (i.e., shear strength, initial stiffness, ductility, and energy dissipation) for SSSWs with the circular opening at the center are proposed. Nonlinear quasistatic analyses under cyclic loading were conducted on a series of perforated SSSWs with different slenderness ratio and different perforation diameters to assess the effectiveness of the proposed equations. Based on the results, the performance characteristics of SSSWs are affected directly by the square D/LPTF (D and LPTF are the perforation diameter and the length of the partial tension field along the beam, respectively). Furthermore, the proposed equations underestimate the reduction factors for web plates with higher perforation ratios, D/H (H is the height of web plate). With an increase in the perforation ratio, deterioration of shear strength and dissipated energy is so severe compared with that of initial stiffness and ductility factor. The proposed equations for performance characteristics deterioration have been validated by the good correlation between predicted values and experimental data.
Strength, stiffness, ductility, and dissipated energy reduction of semisupported steel shear walls (SSSW) due to a circular opening
Semisupported steel shear walls (SSSWs) with web plates that are only connected to the beams were proposed as a means of mitigating column demands. In this research, equations for evaluating the reduction factors of performance characteristics (i.e., shear strength, initial stiffness, ductility, and energy dissipation) for SSSWs with the circular opening at the center are proposed. Nonlinear quasistatic analyses under cyclic loading were conducted on a series of perforated SSSWs with different slenderness ratio and different perforation diameters to assess the effectiveness of the proposed equations. Based on the results, the performance characteristics of SSSWs are affected directly by the square D/LPTF (D and LPTF are the perforation diameter and the length of the partial tension field along the beam, respectively). Furthermore, the proposed equations underestimate the reduction factors for web plates with higher perforation ratios, D/H (H is the height of web plate). With an increase in the perforation ratio, deterioration of shear strength and dissipated energy is so severe compared with that of initial stiffness and ductility factor. The proposed equations for performance characteristics deterioration have been validated by the good correlation between predicted values and experimental data.
Strength, stiffness, ductility, and dissipated energy reduction of semisupported steel shear walls (SSSW) due to a circular opening
Shekastehband, Behzad (Autor:in) / Azaraxsh, Ali Akbar (Autor:in)
10.02.2019
17 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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