Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Investigation on the Efficiency of Self-Centering Two-Yield Buckling Restrained Brace on Low-Rise Steel Frames
https://orcid.org/http://orcid.org/0000-0003-1669-2796
This study presents a novel self-centering two-yield buckling-restrained brace (SC-TYB) incorporating a dual-core configuration with distinct yield strengths, utilizing low-yield point and high-strength steel. This system is introduced to mitigate a critical limitation inherent in buckling-restrained braces (BRB), which rely on hysteretic behavior for seismic energy dissipation and experience a significant reduction in post-yielding stiffness. The feasibility and performance of the proposed brace in braced frames are assessed through a simplified core-spring finite element model. Through nonlinear analysis, this study evaluates the behavior of two-story SC-TYB frames with multiple prevalent arrangements. Pushover and time history analysis utilizing near-field and far-field earthquake records were performed to investigate the ductility, over strength, response modification factors, and the seismic response of braced frames, focusing on maximum inter-story drifts and residual drifts. The results demonstrate that the proposed BRB exhibits a multistage yield pattern and maintains significant post-yield stiffness, effectively counteracting P-delta effects. Also, the response modification factor of frames with the introduced SC-TYB was obtained on average 40% higher than that of BRB frames. Meanwhile, in comparison, the analysis reveals a 10% and 35% average decrease in inter-story and residual drifts, respectively, for SC-TYB frames. Finally, the diagonal arrangement of the proposed system exhibits the minimum inter-story and residual drifts among the evaluated models.
Numerical Investigation on the Efficiency of Self-Centering Two-Yield Buckling Restrained Brace on Low-Rise Steel Frames
https://orcid.org/http://orcid.org/0000-0003-1669-2796
This study presents a novel self-centering two-yield buckling-restrained brace (SC-TYB) incorporating a dual-core configuration with distinct yield strengths, utilizing low-yield point and high-strength steel. This system is introduced to mitigate a critical limitation inherent in buckling-restrained braces (BRB), which rely on hysteretic behavior for seismic energy dissipation and experience a significant reduction in post-yielding stiffness. The feasibility and performance of the proposed brace in braced frames are assessed through a simplified core-spring finite element model. Through nonlinear analysis, this study evaluates the behavior of two-story SC-TYB frames with multiple prevalent arrangements. Pushover and time history analysis utilizing near-field and far-field earthquake records were performed to investigate the ductility, over strength, response modification factors, and the seismic response of braced frames, focusing on maximum inter-story drifts and residual drifts. The results demonstrate that the proposed BRB exhibits a multistage yield pattern and maintains significant post-yield stiffness, effectively counteracting P-delta effects. Also, the response modification factor of frames with the introduced SC-TYB was obtained on average 40% higher than that of BRB frames. Meanwhile, in comparison, the analysis reveals a 10% and 35% average decrease in inter-story and residual drifts, respectively, for SC-TYB frames. Finally, the diagonal arrangement of the proposed system exhibits the minimum inter-story and residual drifts among the evaluated models.
Numerical Investigation on the Efficiency of Self-Centering Two-Yield Buckling Restrained Brace on Low-Rise Steel Frames
https://orcid.org/http://orcid.org/0000-0003-1669-2796
This study presents a novel self-centering two-yield buckling-restrained brace (SC-TYB) incorporating a dual-core configuration with distinct yield strengths, utilizing low-yield point and high-strength steel. This system is introduced to mitigate a critical limitation inherent in buckling-restrained braces (BRB), which rely on hysteretic behavior for seismic energy dissipation and experience a significant reduction in post-yielding stiffness. The feasibility and performance of the proposed brace in braced frames are assessed through a simplified core-spring finite element model. Through nonlinear analysis, this study evaluates the behavior of two-story SC-TYB frames with multiple prevalent arrangements. Pushover and time history analysis utilizing near-field and far-field earthquake records were performed to investigate the ductility, over strength, response modification factors, and the seismic response of braced frames, focusing on maximum inter-story drifts and residual drifts. The results demonstrate that the proposed BRB exhibits a multistage yield pattern and maintains significant post-yield stiffness, effectively counteracting P-delta effects. Also, the response modification factor of frames with the introduced SC-TYB was obtained on average 40% higher than that of BRB frames. Meanwhile, in comparison, the analysis reveals a 10% and 35% average decrease in inter-story and residual drifts, respectively, for SC-TYB frames. Finally, the diagonal arrangement of the proposed system exhibits the minimum inter-story and residual drifts among the evaluated models.
Numerical Investigation on the Efficiency of Self-Centering Two-Yield Buckling Restrained Brace on Low-Rise Steel Frames
Int J Civ Eng
Azizi, Hesam (Autor:in) / Eghbali, Mahdi (Autor:in) / Ahmadi, Jamal (Autor:in)
International Journal of Civil Engineering ; 23 ; 71-94
01.01.2025
24 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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