Effectiveness and Efficiency of Externally Bonded CFRP Sheets for Shear Strengthening of RC Beam-Column Joints
To develop feasible carbon fiber reinforced polymer (CFRP) retrofit schemes for the shear strengthening of real three-dimensional reinforced concrete (RC) beam-column joints, a series of parameters in relation to the contributions of the CFRP sheets externally bonded to joint panels was numerically...
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MDPI AG
2022-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/7/1347 |
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| author | Bu Wang Xianhui Wu Qi Liu Yueyue Wu Fei Huang Linfeng Xu Xing Wu Yuanxin Deng |
| author_facet | Bu Wang Xianhui Wu Qi Liu Yueyue Wu Fei Huang Linfeng Xu Xing Wu Yuanxin Deng |
| author_sort | Bu Wang |
| collection | DOAJ |
| description | To develop feasible carbon fiber reinforced polymer (CFRP) retrofit schemes for the shear strengthening of real three-dimensional reinforced concrete (RC) beam-column joints, a series of parameters in relation to the contributions of the CFRP sheets externally bonded to joint panels was numerically investigated in this study. The parameters include CFRP reinforcement ratio, CFRP layout, transverse beam-to-joint panel width ratio, transverse beam-to-joint panel height ratio, location of transverse beam, and number of transverse beams. Strengthening efficiency, a new dimensionless index, was introduced to evaluate the residual effect of a CFRP-strengthening system weakened by the presence of transverse beams in comparison with the increase in joint shear capacity in relation to the one-way counterpart. The results obtained from 44 nonlinear finite element models, which were calibrated against experimental observations, confirmed the effectiveness of the CFRP strengthening technique with regard to the relatively wide ranges of the parameters. The significant differences among the roles of the parameters were revealed, and the reasons behind the differences were analyzed. Furthermore, the shear mechanism of the CFRP-retrofitted joint panels was discussed with the proposed strut-and-tie model. |
| first_indexed | 2024-03-09T11:30:23Z |
| format | Article |
| id | doaj.art-3f5565dafa5044c4854f8a32f51d9995 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T11:30:23Z |
| publishDate | 2022-03-01 |
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| series | Polymers |
| spelling | doaj.art-3f5565dafa5044c4854f8a32f51d99952023-11-30T23:53:13ZengMDPI AGPolymers2073-43602022-03-01147134710.3390/polym14071347Effectiveness and Efficiency of Externally Bonded CFRP Sheets for Shear Strengthening of RC Beam-Column JointsBu Wang0Xianhui Wu1Qi Liu2Yueyue Wu3Fei Huang4Linfeng Xu5Xing Wu6Yuanxin Deng7School of Civil Engineering, Chang’an University, Xi’an 710064, ChinaSchool of Civil Engineering, Chang’an University, Xi’an 710064, ChinaDongying Transportation Development Group, Dongying 257091, ChinaHebei TOP Architectural Design CO., Ltd., Shanxi Branch, Taiyuan 030000, ChinaSchool of Civil Engineering, Chang’an University, Xi’an 710064, ChinaSchool of Civil Engineering, Chang’an University, Xi’an 710064, ChinaSchool of Civil Engineering, Chang’an University, Xi’an 710064, ChinaSchool of Civil Engineering, Chang’an University, Xi’an 710064, ChinaTo develop feasible carbon fiber reinforced polymer (CFRP) retrofit schemes for the shear strengthening of real three-dimensional reinforced concrete (RC) beam-column joints, a series of parameters in relation to the contributions of the CFRP sheets externally bonded to joint panels was numerically investigated in this study. The parameters include CFRP reinforcement ratio, CFRP layout, transverse beam-to-joint panel width ratio, transverse beam-to-joint panel height ratio, location of transverse beam, and number of transverse beams. Strengthening efficiency, a new dimensionless index, was introduced to evaluate the residual effect of a CFRP-strengthening system weakened by the presence of transverse beams in comparison with the increase in joint shear capacity in relation to the one-way counterpart. The results obtained from 44 nonlinear finite element models, which were calibrated against experimental observations, confirmed the effectiveness of the CFRP strengthening technique with regard to the relatively wide ranges of the parameters. The significant differences among the roles of the parameters were revealed, and the reasons behind the differences were analyzed. Furthermore, the shear mechanism of the CFRP-retrofitted joint panels was discussed with the proposed strut-and-tie model.https://www.mdpi.com/2073-4360/14/7/1347carbon fiber-reinforced polymerreinforced concrete beam-column jointtransverse beamshear strengtheningnonlinear finite element analysis |
| spellingShingle | Bu Wang Xianhui Wu Qi Liu Yueyue Wu Fei Huang Linfeng Xu Xing Wu Yuanxin Deng Effectiveness and Efficiency of Externally Bonded CFRP Sheets for Shear Strengthening of RC Beam-Column Joints Polymers carbon fiber-reinforced polymer reinforced concrete beam-column joint transverse beam shear strengthening nonlinear finite element analysis |
| title | Effectiveness and Efficiency of Externally Bonded CFRP Sheets for Shear Strengthening of RC Beam-Column Joints |
| title_full | Effectiveness and Efficiency of Externally Bonded CFRP Sheets for Shear Strengthening of RC Beam-Column Joints |
| title_fullStr | Effectiveness and Efficiency of Externally Bonded CFRP Sheets for Shear Strengthening of RC Beam-Column Joints |
| title_full_unstemmed | Effectiveness and Efficiency of Externally Bonded CFRP Sheets for Shear Strengthening of RC Beam-Column Joints |
| title_short | Effectiveness and Efficiency of Externally Bonded CFRP Sheets for Shear Strengthening of RC Beam-Column Joints |
| title_sort | effectiveness and efficiency of externally bonded cfrp sheets for shear strengthening of rc beam column joints |
| topic | carbon fiber-reinforced polymer reinforced concrete beam-column joint transverse beam shear strengthening nonlinear finite element analysis |
| url | https://www.mdpi.com/2073-4360/14/7/1347 |
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