Performance of reinforced concrete beam-column joint subjected to repeated reversed load
Beam-column joints of reinforced concrete structures are common exterior moment resisting fkame in buildings. Understanding the complex behavior of this joint method under repeated load is crucial because of their basic materials have limited strengths that can cause the limited force carrying capac...
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| Format: | Thesis |
| Published: |
2012
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| Online Access: | http://eprints.uthm.edu.my/5578/ http://eprints.uthm.edu.my/5578/1/0777.pdf |
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| Summary: | Beam-column joints of reinforced concrete structures are common exterior moment resisting fkame in buildings. Understanding the complex behavior of this joint method
under repeated load is crucial because of their basic materials have limited strengths that can cause the limited force carrying capacity. This study was focus on the
performance of beam column joint subjected to repeated reversed load. Three specimens of reinforced concrete (RC) exterior beam-column joint with different steel detail arrangement had been prepared and tested under repeated reversed load. All beam-column joint specimens were designed in accordance to BS 8110 and the types of joint were exterior joint. First specimen was the control specimen where no additional shear link on beam reinforcement and no anchorages of bars were tied between beam and column. Second speciment consist of additional shear link on beam reinforcement with 75 mm spacing which is closer then specimen 1 and 3. Third specimen introduced cross-bracing of reinforcement bars at the intersection of beam-column joint. In this study, failure load, beam displacement, stiffness, strain value of steel reinforcement, mode of failure had been presented. The repeated reversed loads were applied to the end of cantilever beam. The dimension for each column was 300 x 300 x 1500 mm, and the cantilever beam with dimension, 300 x 150 x 1000 rnm was located at the mid-height of column. High-yield steel was utilized for all main reinforcement with 8T16 bars for column rebar and 4T16 for
cantilever RC beam. Mild steel type was used for all steel links. In addition, 30 grade of concrete was employed and the concrete design was based on JKR mix design method. The result of this study shown that the best performances of RC beam column joint is third specimen which is can be explained that cross bracing joint of the beam-column joint is the greatest type of joint among the three specimen of joint since it showed the well performance under seismic condition. |
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