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Structural Engineering and Mechanics Volume 58, Number 2, April25 2016 , pages 379-395 DOI: https://doi.org/10.12989/sem.2016.58.2.379 |
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Seismic performance of RC-column wrapped with Velcro |
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Minho Kwon, Hyunsu Seo and Jinsup Kim
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| Abstract | ||
| A seismic strengthening method using Velcro is proposed to improve the seismic performance of columns in RC frame structures. The proposed method was evaluated experimentally using three fabricated RC specimens. Velcro was wrapped around the columns of the RC-frame specimen to prevent concrete spall falling. The reinforcing performance of the Velcro was determined from comparison of results on seismic performance (i.e., strength, displacement, failure mode, displacement ductility capacity and amount of dissipated energy). As the displacement of the reinforced specimens was increased, the amount of dissipated energy increased drastically, and the displacement-ductility-capacity of the reinforced specimens also increased. The final failure mode of RC frame structure was changed. As a result, it was concluded that the proposed seismic strengthening method using Velcro could be used to increase the displacement ductility of RC columns, and could be used to change the final failure mode of RC-frame structures. | ||
| Key Words | ||
| Velcro; RC column; seismic performance; concrete spalling; ductility | ||
| Address | ||
| Minho Kwon and Hyunsu Seo: Department of Civil Engineering, ERI, Gyeongsang National University, Jinju 660-701, South Korea Jinsup Kim: Department of Civil Engineering, University of Texas at Arlington, Arlington, TX 76019, USA | ||