Study of the Interfacial Bond Behavior between CFRP Grid–PCM Reinforcing Layer and Concrete via a Simplified Mechanical Model
This paper presents the results of pull-out tests conducted to investigate the interfacial bond behavior between a carbon-fiber-reinforced polymer (CFRP) grid–polymer cement mortar (PCM) reinforcing layer and existing concrete, and proposes a simplified mechanical model to further study the interfac...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/14/22/7053 |
| _version_ | 1797509537984413696 |
|---|---|
| author | Huijuan Dai Bo Wang Jiawei Zhang Junlei Zhang Kimitaka Uji |
| author_facet | Huijuan Dai Bo Wang Jiawei Zhang Junlei Zhang Kimitaka Uji |
| author_sort | Huijuan Dai |
| collection | DOAJ |
| description | This paper presents the results of pull-out tests conducted to investigate the interfacial bond behavior between a carbon-fiber-reinforced polymer (CFRP) grid–polymer cement mortar (PCM) reinforcing layer and existing concrete, and proposes a simplified mechanical model to further study the interface bond mechanism. Four specimens composed of a CFRP grid, PCM, and concrete were tested. The influence of the type of CFRP grid and the grid interval on the interface bond behavior was discussed. The failure patterns, maximum tensile loads, and CFRP grid strains were obtained. The change process of interface bond stress was investigated based on the grid strain analysis. In addition, the simplified mechanical model and finite element model (FEM) were emphatically established, and the adaptability of the simplified mechanical model was validated through the comparative analysis between the FEM results and the test results. The research results indicate that a CFRP grid with a larger cross-sectional area and smaller grid interval could effectively improve the interface bond behavior. The tensile stress was gradually transferred from the loaded edge to the free edge in the CFRP grid. The interface bond behavior was mainly dependent on the anchorage action of the CFRP grid in the PCM, and the bond action between the PCM and the concrete. The FEM results were consistent with the test results, and the simplified mechanical model with nonlinear springs could well describe the interface bond mechanism between the CFRP grid–PCM reinforcing layer and concrete. |
| first_indexed | 2024-03-10T05:19:09Z |
| format | Article |
| id | doaj.art-ce99a61dcc29449286f325e076746ab7 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:19:09Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-ce99a61dcc29449286f325e076746ab72023-11-23T00:12:58ZengMDPI AGMaterials1996-19442021-11-011422705310.3390/ma14227053Study of the Interfacial Bond Behavior between CFRP Grid–PCM Reinforcing Layer and Concrete via a Simplified Mechanical ModelHuijuan Dai0Bo Wang1Jiawei Zhang2Junlei Zhang3Kimitaka Uji4School of Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Civil Engineering, Chang’an University, Xi’an 710061, ChinaSchool of Civil Engineering, Chang’an University, Xi’an 710061, ChinaDepartment of Civil and Environmental Engineering, Tokyo Metropolitan University, Tokyo 192-0397, JapanDepartment of Civil and Environmental Engineering, Tokyo Metropolitan University, Tokyo 192-0397, JapanThis paper presents the results of pull-out tests conducted to investigate the interfacial bond behavior between a carbon-fiber-reinforced polymer (CFRP) grid–polymer cement mortar (PCM) reinforcing layer and existing concrete, and proposes a simplified mechanical model to further study the interface bond mechanism. Four specimens composed of a CFRP grid, PCM, and concrete were tested. The influence of the type of CFRP grid and the grid interval on the interface bond behavior was discussed. The failure patterns, maximum tensile loads, and CFRP grid strains were obtained. The change process of interface bond stress was investigated based on the grid strain analysis. In addition, the simplified mechanical model and finite element model (FEM) were emphatically established, and the adaptability of the simplified mechanical model was validated through the comparative analysis between the FEM results and the test results. The research results indicate that a CFRP grid with a larger cross-sectional area and smaller grid interval could effectively improve the interface bond behavior. The tensile stress was gradually transferred from the loaded edge to the free edge in the CFRP grid. The interface bond behavior was mainly dependent on the anchorage action of the CFRP grid in the PCM, and the bond action between the PCM and the concrete. The FEM results were consistent with the test results, and the simplified mechanical model with nonlinear springs could well describe the interface bond mechanism between the CFRP grid–PCM reinforcing layer and concrete.https://www.mdpi.com/1996-1944/14/22/7053CFRP gridPCMinterfacemechanical modelpull-out testfinite element analysis |
| spellingShingle | Huijuan Dai Bo Wang Jiawei Zhang Junlei Zhang Kimitaka Uji Study of the Interfacial Bond Behavior between CFRP Grid–PCM Reinforcing Layer and Concrete via a Simplified Mechanical Model Materials CFRP grid PCM interface mechanical model pull-out test finite element analysis |
| title | Study of the Interfacial Bond Behavior between CFRP Grid–PCM Reinforcing Layer and Concrete via a Simplified Mechanical Model |
| title_full | Study of the Interfacial Bond Behavior between CFRP Grid–PCM Reinforcing Layer and Concrete via a Simplified Mechanical Model |
| title_fullStr | Study of the Interfacial Bond Behavior between CFRP Grid–PCM Reinforcing Layer and Concrete via a Simplified Mechanical Model |
| title_full_unstemmed | Study of the Interfacial Bond Behavior between CFRP Grid–PCM Reinforcing Layer and Concrete via a Simplified Mechanical Model |
| title_short | Study of the Interfacial Bond Behavior between CFRP Grid–PCM Reinforcing Layer and Concrete via a Simplified Mechanical Model |
| title_sort | study of the interfacial bond behavior between cfrp grid pcm reinforcing layer and concrete via a simplified mechanical model |
| topic | CFRP grid PCM interface mechanical model pull-out test finite element analysis |
| url | https://www.mdpi.com/1996-1944/14/22/7053 |
| work_keys_str_mv | AT huijuandai studyoftheinterfacialbondbehaviorbetweencfrpgridpcmreinforcinglayerandconcreteviaasimplifiedmechanicalmodel AT bowang studyoftheinterfacialbondbehaviorbetweencfrpgridpcmreinforcinglayerandconcreteviaasimplifiedmechanicalmodel AT jiaweizhang studyoftheinterfacialbondbehaviorbetweencfrpgridpcmreinforcinglayerandconcreteviaasimplifiedmechanicalmodel AT junleizhang studyoftheinterfacialbondbehaviorbetweencfrpgridpcmreinforcinglayerandconcreteviaasimplifiedmechanicalmodel AT kimitakauji studyoftheinterfacialbondbehaviorbetweencfrpgridpcmreinforcinglayerandconcreteviaasimplifiedmechanicalmodel |