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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic Performance of Self-Centering BRB Frames: A Study Under Near-Field Ground Motions
Buckling-restrained braced frames (BRBFs) are design for the seismic resisting purpose on the active seismic zones. The symmetrical hysteresis, high ductility, and large capacity to dissipate energy made this system superior to conventional concentrically-braced systems. Most of the past studies concluded that BRBFs might suffer from the excessive post-earthquake residual drift as compared to the other systems under the near-field earthquakes. The excessive residual drift in BRBFs is the main disadvantage, which is led us to the development of the self-centering buckling-restrained braced frames (SC-BRBFs). The better energy dissipation capacity, the absence of compressive buckling behavior of braces, high ductility, and reducing residual drift response make the SC-BRBs a preferred alternative over the conventional system like BRBFs. The study mainly focuses on the evaluation of the seismic response of SC-BRBFs under the near-field earthquakes. Three low, medium, and rise study frames, namely 3-story, 9-story, and 20-story SAC benchmark buildings (Ohtori in J Eng Mech 130:366–385, 2004), are considered for this study. The frames are designed based on AISC 341–2010 provisions. The SC-BRB is considered as the combine of buckling-restrained brace (BRB) and shape memory alloy (SMA) rods. These frames are modeled and analyzed using computer software OpenSees. A set of forty near-field ground motions are selected in the nonlinear dynamic (time history) analysis. The main parameters investigated are inter-story drift response and residual drift response. The analysis results for SC-BRBFs showed better performance as compared to conventional BRBs with the negligible residual drift response.
Seismic Performance of Self-Centering BRB Frames: A Study Under Near-Field Ground Motions
Buckling-restrained braced frames (BRBFs) are design for the seismic resisting purpose on the active seismic zones. The symmetrical hysteresis, high ductility, and large capacity to dissipate energy made this system superior to conventional concentrically-braced systems. Most of the past studies concluded that BRBFs might suffer from the excessive post-earthquake residual drift as compared to the other systems under the near-field earthquakes. The excessive residual drift in BRBFs is the main disadvantage, which is led us to the development of the self-centering buckling-restrained braced frames (SC-BRBFs). The better energy dissipation capacity, the absence of compressive buckling behavior of braces, high ductility, and reducing residual drift response make the SC-BRBs a preferred alternative over the conventional system like BRBFs. The study mainly focuses on the evaluation of the seismic response of SC-BRBFs under the near-field earthquakes. Three low, medium, and rise study frames, namely 3-story, 9-story, and 20-story SAC benchmark buildings (Ohtori in J Eng Mech 130:366–385, 2004), are considered for this study. The frames are designed based on AISC 341–2010 provisions. The SC-BRB is considered as the combine of buckling-restrained brace (BRB) and shape memory alloy (SMA) rods. These frames are modeled and analyzed using computer software OpenSees. A set of forty near-field ground motions are selected in the nonlinear dynamic (time history) analysis. The main parameters investigated are inter-story drift response and residual drift response. The analysis results for SC-BRBFs showed better performance as compared to conventional BRBs with the negligible residual drift response.
Seismic Performance of Self-Centering BRB Frames: A Study Under Near-Field Ground Motions
Lecture Notes in Civil Engineering
Madhavan, Mahendrakumar (Herausgeber:in) / Davidson, James S. (Herausgeber:in) / Shanmugam, N. Elumalai (Herausgeber:in) / Ghowsi, Ahmad Fayeq (Autor:in) / Sahoo, Dipti Ranjan (Autor:in) / Kumar, Rajesh (Autor:in)
Indian Structural Steel Conference ; 2020 ; Hyderabad, India
Proceedings of the Indian Structural Steel Conference 2020 (Vol. 1) ; Kapitel: 57 ; 699-709
17.08.2023
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Seismic efficiency of self-centering braced frame under near-field pulse-like ground motions
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