Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods
Many researchers around the world have made extensive efforts to study the phenomenon of fiber-reinforced polymer (FRP) debonding. Based on these efforts, code provisions and various models have been proposed for predicting intermediate crack (IC) debonding failure. The paper presents a comparison o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/20/7390 |
| _version_ | 1797471739083489280 |
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| author | Paweł Tworzewski Jeffrey K. Alexy Robert W. Barnes |
| author_facet | Paweł Tworzewski Jeffrey K. Alexy Robert W. Barnes |
| author_sort | Paweł Tworzewski |
| collection | DOAJ |
| description | Many researchers around the world have made extensive efforts to study the phenomenon of fiber-reinforced polymer (FRP) debonding. Based on these efforts, code provisions and various models have been proposed for predicting intermediate crack (IC) debonding failure. The paper presents a comparison of seven selected models: <i>fib</i> bulletin 14 approach, Teng et al. model, Lu model, Seracino et al. model, Said and Wu model, Elsanadedy et al. model and ACI 440. The accuracy of each model was evaluated based on the test results of 58 flexural specimens with IC debonding failures of externally bonded (EB), carbon FRP plates or sheets found in the existing literature. The experimental database was prepared to include a wide range of parameters affecting the issue under consideration. A comparison of the measured and predicted load capacity values was made to evaluate the prediction accuracy of the considered models. The analysis included the limitation of the load capacity estimated based on IC debonding models as well as concrete crushing and FRP rupture types of failure. The results indicate that the latest models proposed for direct implementation in design guidelines—the Said and Wu model and the Elsanadedy et al. model—offer the best accuracy in predicting the load capacity. In contrast, the <i>fib</i> bulletin 14 approach shows a wide dispersion of predictions and a large proportion of highly overestimated results. |
| first_indexed | 2024-03-09T19:53:25Z |
| format | Article |
| id | doaj.art-ba3d3e73997649639c3f472e060423fc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T19:53:25Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-ba3d3e73997649639c3f472e060423fc2023-11-24T01:06:03ZengMDPI AGMaterials1996-19442022-10-011520739010.3390/ma15207390Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of MethodsPaweł Tworzewski0Jeffrey K. Alexy1Robert W. Barnes2Department of Strength of Materials, Concrete and Bridge Structures, Kielce University of Technology, aleja Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, PolandBrown+Kubican Structural Engineers, 2224 Young Dr, Lexington, KY 40505, USADepartment of Civil and Environmental Engineering, 238 Harbert Engineering Center, Auburn University, Auburn, AL 36849, USAMany researchers around the world have made extensive efforts to study the phenomenon of fiber-reinforced polymer (FRP) debonding. Based on these efforts, code provisions and various models have been proposed for predicting intermediate crack (IC) debonding failure. The paper presents a comparison of seven selected models: <i>fib</i> bulletin 14 approach, Teng et al. model, Lu model, Seracino et al. model, Said and Wu model, Elsanadedy et al. model and ACI 440. The accuracy of each model was evaluated based on the test results of 58 flexural specimens with IC debonding failures of externally bonded (EB), carbon FRP plates or sheets found in the existing literature. The experimental database was prepared to include a wide range of parameters affecting the issue under consideration. A comparison of the measured and predicted load capacity values was made to evaluate the prediction accuracy of the considered models. The analysis included the limitation of the load capacity estimated based on IC debonding models as well as concrete crushing and FRP rupture types of failure. The results indicate that the latest models proposed for direct implementation in design guidelines—the Said and Wu model and the Elsanadedy et al. model—offer the best accuracy in predicting the load capacity. In contrast, the <i>fib</i> bulletin 14 approach shows a wide dispersion of predictions and a large proportion of highly overestimated results.https://www.mdpi.com/1996-1944/15/20/7390debondingFRPRC beamsstrengtheningfailure modesEBR |
| spellingShingle | Paweł Tworzewski Jeffrey K. Alexy Robert W. Barnes Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods Materials debonding FRP RC beams strengthening failure modes EBR |
| title | Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods |
| title_full | Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods |
| title_fullStr | Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods |
| title_full_unstemmed | Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods |
| title_short | Intermediate Crack Debonding of Externally Bonded FRP Reinforcement—Comparison of Methods |
| title_sort | intermediate crack debonding of externally bonded frp reinforcement comparison of methods |
| topic | debonding FRP RC beams strengthening failure modes EBR |
| url | https://www.mdpi.com/1996-1944/15/20/7390 |
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