AFRP Reinforced Concrete Column with Controlled Rocking Connection
Publication: Structures Congress 2022
ABSTRACT
AFRP bars have experienced premature rupture under concentric loads due to their anisotropic properties, limiting their usage in compression members. A limited number of studies have been conducted on the reliability of implementing energy dissipaters to prevent the rupture of AFRP longitudinal bars in compression. However, the research to date has failed to emphasize the influence of rocking connection and size of replaceable fuse on the performance of the column. This research explored the strategy of designing the AFRP-reinforced concrete (AFRP-RC) column to remain elastic while incorporating external replaceable fuses as sacrificial elements to dissipate energy and reduce damage. A three-dimensional finite element model was developed and validated. An extensive parametric analysis was performed on 100 numerical models with a typical column size. Enhanced performance of the AFRP-RC controlled rocking system in terms of ductility, energy dissipation, damage index, and work index was found. Key design parameters of replaceable fuses that influence the cyclic performance of the column were identified. A set of equations are proposed to assist in designing the controlled rocking columns with replaceable fuses.
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Structures Congress 2022
Pages: 113 - 134
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Published online: Apr 18, 2022
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