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Abstract:
This paper proposes two types of Friction Damper with Enhanced Recentering capability (FDERs). Based on the configuration of the conventional symmetrical friction damper, FDERs make modifications by replacing one or two flat cap plates with grooved cap plates, denoted as Configuration 1 (C1) and Configuration 2 (C2), respectively. The disc spring stacks are installed beneath the bolts to provide elastic recovery force and deformability for the dampers. The configuration and working mechanism of FDERs was first discussed. Then, the analytical equations governing the cyclic behavior of FDERs were derived, which was followed by theoretical investigations. It was found that the recentering capability of FDERs was consistently superior to that of the conventional friction damper, regardless of variations in design parameters. The proof-of-concept tests were conducted on the FDERs specimens to examine their hysteretic behaviors. A total of 5 reduced-scale specimens were designed and fabricated, and the main parameters included bolt preload, damper type, recentering capacity, and bending bearing capacity of the cap plates. Test results validate the good energy dissipation capacity and enhanced recentering capability of FDERs. Compared with the damper with a full self-centering behavior, the easy recentering damper with a "pinching-like" behavior showed a larger hysteretic damping. In addition, the strength, stiffness, and energy dissipation capacity of FDERs exhibit obviously increase as the bolt preload increases. Three finite element models of FDERs were established in ABAQUS for numerical simulations. The hysteresis and local behavior of FDERs can be accurately predicted by the analytical equations and duplicated by the ABAQUS model.
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ENGINEERING STRUCTURES
ISSN: 0141-0296
Year: 2025
Volume: 326
5 . 5 0 0
JCR@2022
Cited Count:
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ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 5
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