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Earthquakes and Structures Volume 26, Number 1, January 2024 , pages 49-58 DOI: https://doi.org/10.12989/eas.2024.26.1.049 |
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 open accessExperimental study on replaceable precast concrete beam-column connections |
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Seung-Ho Choi, Sang-Hoon Lee, Jae-Hyun Kim, Inwook Heo, Hoseong Jeong and Kang Su Kim
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| Abstract | ||
| The purpose of this study was to develop a system capable of restoring the seismic performance of a precast concrete (PC) connection damaged by an earthquake. The developed PC connection consists of a top-and-seat angle, posttensioning (PT) tendons, and U-shaped steel. The PC beam can be replaced by cutting the PT tendons in the event of damage. In addition, the seismic performance of the developed PC beam-column connection was evaluated experimentally. A PC beamcolumn connection specimen was fabricated, and a quasistatic cyclic loading test was conducted to a maximum drift ratio of 2.3%. Subsequently, the PC beam was replaced by a new PC beam, and the repaired PC connection was loaded to a maximum drift ratio of 5.1%. The structural performance of the repaired PC connection was then compared with that of the original PC connection. The difference in the load at the drift ratio of 2.3% between the original and the repaired PC specimens was only 0.2%. The residual drift ratio in the repaired PC specimen did not exceed 1.0% at the 2.0 % drift ratio cycles, which satisfies the life safety performance level specified in ACI 374.2R-13. When the developed PC connection system is used, structural performance can be restored by rapidly replacing the damaged elements. | ||
| Key Words | ||
| beam-column joint; precast concrete; replaceable; seismic performance | ||
| Address | ||
| Seung-Ho Choi: Department of Disaster Management and Fire Safety Engineering, University of Seoul, 163 Siripdae-ro, Dongdaemun-gu, Seoul 02504, Korea Sang-Hoon Lee and Kang Su Kim: Department of Architectural Engineering and the Smart City Interdisciplinary Major Program, University of Seoul, 163 Siripdae-ro, Dongdaemun-gu, Seoul 02504, Korea Jae-Hyun Kim, Inwook Heo and Hoseong Jeong: Department of Architectural Engineering, University of Seoul, 163 Siripdae-ro, Dongdaemun-gu, Seoul 02504, Korea | ||