Abstract
AbstractIn seismic design, bridges are typically designed to undergo inelastic deformations during a severe earthquake. In those instances, most of the seismic energy is dissipated through hysteretic behavior of the critical load-resisting components, which results in permanent system deformations and damage and could make repairs expensive or, in some cases, impossible. Thus, concentrating earthquake damage in structural fuses inserted in bridge bents is desirable; the performance objective is for the main gravity load-bearing members (the columns, in this case) to be intact after an earthquake, limiting repairs to fuses that can be removed and replaced easily. This paper presents results from case studies that considered the use of buckling-restrained braces (BRBs) as hysteretic energy-dissipation devices inserted in bridge bents to dissipate earthquake energy and improve structural performance by minimizing inelastic demands on the columns. A typical California bridge was used for this purpose. For str...
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