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Earthquakes and Structures Volume 30, Number 6, June 2026 , pages 777-804 DOI: https://doi.org/10.12989/eas.2026.30.6.777 |
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 open accessInvestigation on hysteretic behavior of a novel spring-friction self-centering brace |
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Yang Chen, Cheng Chen, Jun Tang, Shiqiang Feng, Yong Yang
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| Abstract | ||
| To enhance the seismic resilience of prefabricated steel frame structures, an innovative spring-friction self-centering energy dissipative brace (SF-SCEDB) is proposed. This brace achieves independent control of restoring forces and energy dissipation via helical springs as the self-centering system and friction shims as the energy dissipation system. First, the structural details, assembly process, and operational principles of the SF-SCEDB are elaborated. Subsequently, finite element models using ABAQUS are employed to quantitatively analyze the self-centering capacity, energy dissipation efficiency, and stiffness of the brace. Simulation results demonstrated that the hysteretic curve was flag-shaped with negligible residual deformation under cyclic loading. Parametric studies revealed that increasing the stiffness of helical springs and pre-compression length of helical springs enhanced both energy dissipation and self-centering abilities. However, higher bolt preload and friction coefficients of the friction shims improved energy dissipation at the expense of self-centering capability. The SF-SCEDB exhibits excellent hysteretic behavior and robust self-centering performance, making it promising for mitigating earthquake-induced damage and accelerating post-seismic rehabilitation in steel frames. | ||
| Key Words | ||
| adjustable friction energy dissipation system; finite element model; hysteretic behavior; restoring force model; seismic performance; self-centering brace | ||
| Address | ||
| Yang Chen: 1) School of Mechanics and Engineering Science, Shanghai University, Shanghai, 200444, China; 2) China-Pakistan Belt and Road Joint Laboratory on Smart Disaster Prevention of Major Infrastructures, Southeast University, Nanjing, 211189, China Cheng Chen: School of Mechanics and Engineering Science, Shanghai University, Shanghai, 200444, China Jun Tang: Quakesafe Technologies Co., Ltd, Kunming, Yunnan,650200, China Shiqiang Feng, Yong Yang: Department of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an, Shaanxi 710055, China | ||