Experimental Study on the Bonding Performance of Longitudinal Reinforcement in CRC Beam-column Joints under Cyclic Loads
[1]CHU Liusheng,WANG Qiyuan,WANG Shuaiqi,et al.Experimental Study on the Bonding Performance of Longitudinal Reinforcement in CRC Beam-column Joints under Cyclic Loads[J].Journal of Zhengzhou University (Engineering Science),2022,43(04):74-79.[doi:10.13705/j.issn.1671-6833.2022.04.014]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
43
Number of periods:
2022 04
Page number:
74-79
Column:
Public date:
2022-07-03
- Title:
- Experimental Study on the Bonding Performance of Longitudinal Reinforcement in CRC Beam-column Joints under Cyclic Loads
- Keywords:
- crumb rubber concrete; joint; longitudinal reinforcement bond stress; low cyclic loading test; axial compression ratio
- CLC:
- TU375. 4
- DOI:
- 10.13705/j.issn.1671-6833.2022.04.014
- Abstract:
- In order to study the longitudinal reinforcement bonding performance of crumb rubber concrete beam-column joints,four beam-column joints specimens were designed and fabricated,including one full-scale joint of ordinary concrete and three full-scale joints of rubber concrete.The rubber replacement rate was 15%.Low cyclic loading tests were carried out on each specimen to obtain the failure modes,load-displacement hysteresis curves and bond stress hysteresis curves of longitudinal bars under different materials and axial compression ratios,and the average bond stress of longitudinal bars was analyzed.The results show that under low cyclic loading,the failure mode of each node specimen is the shear failure of the core area.The average bond stress increases linearly with load.After entering the yield stage,the average bond stress reaches the peak and gradually degenerates,resulting in bond slip.At the same concrete strength grade,the bond strength of longitudinal reinforcement in beam-column joints is reduced by 5% by adding rubber.With the increase of axial compression ratio,the bond stress and relative bond strength of longitudinal reinforcement increase,and the bonding performance is improved.The bond strength of longitudinal bars at high axial pressure ratio (0.59) is 5% and 13% higher than that at medium (0.37) and low (0.15) axial pressure ratios,respectively.Under the rubber replacement rate,the effect of high axial pressure ratio (0.59) on the bond performance of longitudinal reinforcement is greater than that of adding rubber.
- References:
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Last Update:
2022-07-03