Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Evaluation of Self-Centering Buckling-Restrained Braces with Prestressed Iron-Based Shape Memory Alloy Tendons
Society is moving toward resilience-oriented communities, encouraging engineers to adopt resilience-based philosophies in design. For example, in earthquake prone regions, these philosophies are aimed at regaining a building’s functionality in a relatively short time compared to traditional design criteria. This study examines a dual-tube self-centering buckling-restrained brace (BRB) prestressed with iron-based shape memory alloy (Fe-SMA) tendons. Self-centering bracing systems can accommodate large deformations and limit residual effects. These devices allow structural systems to undergo large displacement without severe structural damage while providing stable energy dissipation and self-centering action. Although Fe-SMA does not possess the superelastic property as nickel–titanium (Ni–Ti) SMA, the heat-activated shape memory effect can be exploited to provide effective self-centering capabilities at a fraction of the cost of Ni–Ti SMA. The low cost and high recovery stress characteristics of Fe-SMA make it a promising alternative for self-centering and other structural engineering applications. In this study, the BRB is conceptualized in OpenSees and implemented in a 2D moment-resisting steel frame. The structural system is subjected to nonlinear time history analyses to assess its seismic performance. The re-centering capabilities of the Fe-SMA BRB demonstrate the potential for reduced post-earthquake repairs, thereby improving the seismic resilience of structures.
Numerical Evaluation of Self-Centering Buckling-Restrained Braces with Prestressed Iron-Based Shape Memory Alloy Tendons
Society is moving toward resilience-oriented communities, encouraging engineers to adopt resilience-based philosophies in design. For example, in earthquake prone regions, these philosophies are aimed at regaining a building’s functionality in a relatively short time compared to traditional design criteria. This study examines a dual-tube self-centering buckling-restrained brace (BRB) prestressed with iron-based shape memory alloy (Fe-SMA) tendons. Self-centering bracing systems can accommodate large deformations and limit residual effects. These devices allow structural systems to undergo large displacement without severe structural damage while providing stable energy dissipation and self-centering action. Although Fe-SMA does not possess the superelastic property as nickel–titanium (Ni–Ti) SMA, the heat-activated shape memory effect can be exploited to provide effective self-centering capabilities at a fraction of the cost of Ni–Ti SMA. The low cost and high recovery stress characteristics of Fe-SMA make it a promising alternative for self-centering and other structural engineering applications. In this study, the BRB is conceptualized in OpenSees and implemented in a 2D moment-resisting steel frame. The structural system is subjected to nonlinear time history analyses to assess its seismic performance. The re-centering capabilities of the Fe-SMA BRB demonstrate the potential for reduced post-earthquake repairs, thereby improving the seismic resilience of structures.
Numerical Evaluation of Self-Centering Buckling-Restrained Braces with Prestressed Iron-Based Shape Memory Alloy Tendons
Lecture Notes in Civil Engineering
Gupta, Rishi (Herausgeber:in) / Sun, Min (Herausgeber:in) / Brzev, Svetlana (Herausgeber:in) / Alam, M. Shahria (Herausgeber:in) / Ng, Kelvin Tsun Wai (Herausgeber:in) / Li, Jianbing (Herausgeber:in) / El Damatty, Ashraf (Herausgeber:in) / Lim, Clark (Herausgeber:in) / Carofilis, Wilson (Autor:in) / Kim, Eugene (Autor:in)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Kapitel: 46 ; 671-683
06.08.2023
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Self-Centering Buckling-Restrained Braces
| Tema Archiv | 2013
Self-Centering Buckling-Restrained Braces
| British Library Conference Proceedings | 2013