Cyclic Behavior of Hybrid Honeycomb-and-Flexural Yielding Dampers in Chevron CBFs

Authors

Faculty of Civil Engineering, Urmia University of Technology

Abstract

Concentrically braced frames (CBFs) enables high lateral strength and elastic stiffness in comparison with other common systems such as eccentrically braced frames (EBFs) and moment-resisting frames (MRFs). Despite the advantages of the CBF systems, they do not provide considerable seismic energy dissipation capacity due to buckling of the braces under compressive loads. Various types of control systems, such as, friction dampers, viscoelastic dampers, metallic yielding dampers, and etc. have been proposed to mitigate the destructive action of earthquakes on buildings. Among these dampers, metallic yielding dampers are the simplest, cost-effective and easy to fabricate. Among the different metallic yielding dampers, steel plate yielding fuses are the most efficient devices which have been extensively studied by researchers. ADAS is a type of flexural dampers in which the hysteretic energy is achieved through the flexural yielding of steel plates. However, this type of damper suffers from the relatively low initial stiffness (Xia and Hanson 1992). Another type of metallic dampers is the shear link which relies on the inelastic shear deformation of metallic plates under the in-plane loading and offers high initial stiffness and stable energy dissipation (Bakhshayesh et al. 2021). A new shear damper, known as honeycomb structural fuse (HSF), was proposed and developed. The energy dissipation potential of such devices can be improved if the metallic plates are so oriented that they can undergo combined flexure and shear deformation under the action of lateral loading. In this study, a combined honeycomb-and-flexural yielding dampers are proposed as passive energy dissipation systems.

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Journal of Civil and Environmental Engineering
Volume 54.2, Issue 115 - Serial Number 115
Summer of 2024
November 2024
Pages 13-24

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