نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
Background & Objective: Conventional friction dampers limit seismic resilience due to permanent deformations. This study proposes incorporating self-centering capability into double-level friction dampers to reduce residual drift, enhance seismic performance, and facilitate post-earthquake serviceability.
Methodology: The numerical performance of the proposed self-centering double-level friction damper was compared to conventional single-level and self-centering single-level friction dampers. Three-dimensional 6-, 12-, and 18-story steel special moment-resisting frames equipped with each damper were designed in ETABS via API. Nonlinear time-history analyses were conducted using OpenSeesPy under DBE and MCE earthquake levels.
Findings: Although the conventional damper produced 32.7% and 22.6% lower mean peak accelerations than the self-centering double-level and single-level dampers, respectively, its mean residual drift was 342.7% and 416.3% higher. Crucially, the proposed dual-level damper matched the performance of the single-level self-centering damper while requiring roughly half the re-centering force, making it highly suitable for post-tensioned structures.
Conclusion: Self-centering friction dampers significantly outperform conventional dampers in controlling residual drift and boosting seismic resilience, highlighting their effectivenss for structural safety and post-earthquake functionality.
کلیدواژهها English
