Flexural Behavior of Damaged Hollow RC Box Girders Repaired with Prestressed CFRP
In recent years, numerous studies have explored the benefits of utilizing prestressed carbon fiber-reinforced polymer (CFRP) for strengthening concrete structures. However, research on the reinforcement of prestressed CFRP on full-scale hollow RC box girders, particularly damaged bridges, remains li...
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description | In recent years, numerous studies have explored the benefits of utilizing prestressed carbon fiber-reinforced polymer (CFRP) for strengthening concrete structures. However, research on the reinforcement of prestressed CFRP on full-scale hollow RC box girders, particularly damaged bridges, remains limited. In this study, both experiments and finite element analysis (FEA) were performed to investigate the flexural behavior of full-scale hollow RC box girders with varying degrees of damage, which were strengthened using CFRP with different levels of prestress. The adhesive behavior of the CFRP-concrete interface was considered in the FEA. Numerical simulations were conducted to assess the flexural behaviors of the girders, including failure modes, yield and ultimate loads, and deflections. The results revealed that the application of prestressed CFRP efficiently increased the yield and ultimate loads of the box girders. Specifically, when the degree of damage of the hollow box girder was less than 23%, the flexural bearing capacity of the repaired girder could be recovered after being strengthened with two prestressed CFRP strips measuring 50 mm in width and 3 mm in thickness. However, the risk of premature debonding at the CFRP-concrete interface increased when the prestressing level of CFRP and degree of damage of hollow RC box girders exceeded 35% and 40%, respectively. These findings suggest that the use of prestressed CFRP may be a promising method for repairing damaged hollow RC box girders, but careful consideration of the degree of damage and prestressing level would be necessary to ensure the effectiveness and safety of the repair. |
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However, research on the reinforcement of prestressed CFRP on full-scale hollow RC box girders, particularly damaged bridges, remains limited. In this study, both experiments and finite element analysis (FEA) were performed to investigate the flexural behavior of full-scale hollow RC box girders with varying degrees of damage, which were strengthened using CFRP with different levels of prestress. The adhesive behavior of the CFRP-concrete interface was considered in the FEA. Numerical simulations were conducted to assess the flexural behaviors of the girders, including failure modes, yield and ultimate loads, and deflections. The results revealed that the application of prestressed CFRP efficiently increased the yield and ultimate loads of the box girders. Specifically, when the degree of damage of the hollow box girder was less than 23%, the flexural bearing capacity of the repaired girder could be recovered after being strengthened with two prestressed CFRP strips measuring 50 mm in width and 3 mm in thickness. However, the risk of premature debonding at the CFRP-concrete interface increased when the prestressing level of CFRP and degree of damage of hollow RC box girders exceeded 35% and 40%, respectively. These findings suggest that the use of prestressed CFRP may be a promising method for repairing damaged hollow RC box girders, but careful consideration of the degree of damage and prestressing level would be necessary to ensure the effectiveness and safety of the repair.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma16093338</identifier><identifier>PMID: 37176220</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Analysis ; Bearing capacity ; Box girder bridges ; Box girders ; Bridges ; Carbon fiber reinforced concretes ; Carbon fiber reinforced plastics ; Concrete ; Concrete structures ; Corrosion ; Damage ; Design ; Failure modes ; Fiber reinforced polymers ; Finite element method ; Load ; Maintenance and repair ; Methods ; Numerical analysis ; Prestressed concrete ; Prestressing ; Reinforced concrete ; Ultimate loads</subject><ispartof>Materials, 2023-04, Vol.16 (9), p.3338</ispartof><rights>COPYRIGHT 2023 MDPI AG</rights><rights>2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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However, research on the reinforcement of prestressed CFRP on full-scale hollow RC box girders, particularly damaged bridges, remains limited. In this study, both experiments and finite element analysis (FEA) were performed to investigate the flexural behavior of full-scale hollow RC box girders with varying degrees of damage, which were strengthened using CFRP with different levels of prestress. The adhesive behavior of the CFRP-concrete interface was considered in the FEA. Numerical simulations were conducted to assess the flexural behaviors of the girders, including failure modes, yield and ultimate loads, and deflections. The results revealed that the application of prestressed CFRP efficiently increased the yield and ultimate loads of the box girders. Specifically, when the degree of damage of the hollow box girder was less than 23%, the flexural bearing capacity of the repaired girder could be recovered after being strengthened with two prestressed CFRP strips measuring 50 mm in width and 3 mm in thickness. However, the risk of premature debonding at the CFRP-concrete interface increased when the prestressing level of CFRP and degree of damage of hollow RC box girders exceeded 35% and 40%, respectively. These findings suggest that the use of prestressed CFRP may be a promising method for repairing damaged hollow RC box girders, but careful consideration of the degree of damage and prestressing level would be necessary to ensure the effectiveness and safety of the repair.</description><subject>Analysis</subject><subject>Bearing capacity</subject><subject>Box girder bridges</subject><subject>Box girders</subject><subject>Bridges</subject><subject>Carbon fiber reinforced concretes</subject><subject>Carbon fiber reinforced plastics</subject><subject>Concrete</subject><subject>Concrete structures</subject><subject>Corrosion</subject><subject>Damage</subject><subject>Design</subject><subject>Failure modes</subject><subject>Fiber reinforced polymers</subject><subject>Finite element method</subject><subject>Load</subject><subject>Maintenance and repair</subject><subject>Methods</subject><subject>Numerical analysis</subject><subject>Prestressed concrete</subject><subject>Prestressing</subject><subject>Reinforced concrete</subject><subject>Ultimate loads</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdUVFLHDEQXkpLFetLf0AJ9KUUziaZ3CZ5KnrtaUGoPfQ5ZLOTu8ju5prcqv335ji1akKYYeabL9_HVNVHRo8ANP3WW1ZTDQDqTbXPtK4nTAvx9lm-Vx3mfE3LAWCK6_fVHkgma87pfvVn3uHdmGxHTnBlb0JMJHryw_Z2iS05i10Xb8liRk7iHTkNqcWUyQLXNqTSvg2bFblImDfl5VKYzRcXH6p33nYZDx_iQXU1_3k5O5uc_z79NTs-nzgh6s1Ett41QjsurLKNp-gpUMHaqRbQSiesrlmLkqPnzIuSNQpUo9S0SJ9yr-Cg-r7jXY9Nj63DYVNsmHUKvU3_TLTBvOwMYWWW8cYwyqQWSheGLw8MKf4diwvTh-yw6-yAccyGKwbTGoDTAv38CnodxzQUf1sUl8BrvpV0tEMtbYcmDD6Wj125LfbBxQF9KPVjKTTVUikoA193Ay7FnBP6J_mMmu16zf_1FvCn54afoI_LhHuyC55E</recordid><startdate>20230424</startdate><enddate>20230424</enddate><creator>Guo, Xinyan</creator><creator>Zeng, Lingkai</creator><creator>Zheng, Xiaohong</creator><creator>Li, Baojun</creator><creator>Deng, Zhiheng</creator><general>MDPI AG</general><general>MDPI</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-7482-5441</orcidid></search><sort><creationdate>20230424</creationdate><title>Flexural Behavior of Damaged Hollow RC Box Girders Repaired with Prestressed CFRP</title><author>Guo, Xinyan ; 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However, research on the reinforcement of prestressed CFRP on full-scale hollow RC box girders, particularly damaged bridges, remains limited. In this study, both experiments and finite element analysis (FEA) were performed to investigate the flexural behavior of full-scale hollow RC box girders with varying degrees of damage, which were strengthened using CFRP with different levels of prestress. The adhesive behavior of the CFRP-concrete interface was considered in the FEA. Numerical simulations were conducted to assess the flexural behaviors of the girders, including failure modes, yield and ultimate loads, and deflections. The results revealed that the application of prestressed CFRP efficiently increased the yield and ultimate loads of the box girders. Specifically, when the degree of damage of the hollow box girder was less than 23%, the flexural bearing capacity of the repaired girder could be recovered after being strengthened with two prestressed CFRP strips measuring 50 mm in width and 3 mm in thickness. However, the risk of premature debonding at the CFRP-concrete interface increased when the prestressing level of CFRP and degree of damage of hollow RC box girders exceeded 35% and 40%, respectively. These findings suggest that the use of prestressed CFRP may be a promising method for repairing damaged hollow RC box girders, but careful consideration of the degree of damage and prestressing level would be necessary to ensure the effectiveness and safety of the repair.</abstract><cop>Switzerland</cop><pub>MDPI AG</pub><pmid>37176220</pmid><doi>10.3390/ma16093338</doi><orcidid>https://orcid.org/0000-0001-7482-5441</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Analysis Bearing capacity Box girder bridges Box girders Bridges Carbon fiber reinforced concretes Carbon fiber reinforced plastics Concrete Concrete structures Corrosion Damage Design Failure modes Fiber reinforced polymers Finite element method Load Maintenance and repair Methods Numerical analysis Prestressed concrete Prestressing Reinforced concrete Ultimate loads |
title | Flexural Behavior of Damaged Hollow RC Box Girders Repaired with Prestressed CFRP |
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