Impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with CFRP composites
Exposure of concrete structures to elevated temperatures causes a severe deterioration because of decomposition of cement hydration products, generation of vapor pressure, and the inhomogeneous volume changes of concrete's ingredients and beyond a temperature of 500 °C. The most Retrieval the s...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-06-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509521000024 |
| _version_ | 1818647181586857984 |
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| author | Rajai Z. Al-Rousan |
| author_facet | Rajai Z. Al-Rousan |
| author_sort | Rajai Z. Al-Rousan |
| collection | DOAJ |
| description | Exposure of concrete structures to elevated temperatures causes a severe deterioration because of decomposition of cement hydration products, generation of vapor pressure, and the inhomogeneous volume changes of concrete's ingredients and beyond a temperature of 500 °C. The most Retrieval the structural performance of severely heat-damaged structural concrete members would be most significantly achieved using carbon fiber-reinforced polymer (CFRP) composite materials. Nevertheless, debonding and anchoring problems remain a challenge for the success of this technique. In this study, an innovative application was implemented in which CFRP strips were integrated as external shear reinforcement for reinforced concrete (RC) beams by using the groove technique. The intent was to assess the CFRP strips' contribution to the shear strength and thus evaluate the effectiveness of using them as main or supplemental shear reinforcement before and after exposure to elevated temperature. The investigated parameters include the area and number of layers of CFRP strips and different elevated temperatures. By demonstrating an outstanding structural performance with significant enhancement in the ultimate strength, ultimate deflection, stiffness, and toughness, this paper's findings strongly attest that CFRP strips can be effectively utilized as external shear reinforcement in reinforced concrete beams exposed to elevated temperatures. New guideline and proposed empirical model are developed to predict the damage level and shear strength of heated damaged RC beams externally reinforced with CFRP composites considering the influence of the number of CFRP strips and elevated temperature as groove technique. |
| first_indexed | 2024-12-17T00:58:27Z |
| format | Article |
| id | doaj.art-ca60c106b4ba45c1925b992232088c19 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-12-17T00:58:27Z |
| publishDate | 2021-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-ca60c106b4ba45c1925b992232088c192022-12-21T22:09:33ZengElsevierCase Studies in Construction Materials2214-50952021-06-0114e00487Impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with CFRP compositesRajai Z. Al-Rousan0Civil Engineering Department, Jordan University of Science and Technology, JordanExposure of concrete structures to elevated temperatures causes a severe deterioration because of decomposition of cement hydration products, generation of vapor pressure, and the inhomogeneous volume changes of concrete's ingredients and beyond a temperature of 500 °C. The most Retrieval the structural performance of severely heat-damaged structural concrete members would be most significantly achieved using carbon fiber-reinforced polymer (CFRP) composite materials. Nevertheless, debonding and anchoring problems remain a challenge for the success of this technique. In this study, an innovative application was implemented in which CFRP strips were integrated as external shear reinforcement for reinforced concrete (RC) beams by using the groove technique. The intent was to assess the CFRP strips' contribution to the shear strength and thus evaluate the effectiveness of using them as main or supplemental shear reinforcement before and after exposure to elevated temperature. The investigated parameters include the area and number of layers of CFRP strips and different elevated temperatures. By demonstrating an outstanding structural performance with significant enhancement in the ultimate strength, ultimate deflection, stiffness, and toughness, this paper's findings strongly attest that CFRP strips can be effectively utilized as external shear reinforcement in reinforced concrete beams exposed to elevated temperatures. New guideline and proposed empirical model are developed to predict the damage level and shear strength of heated damaged RC beams externally reinforced with CFRP composites considering the influence of the number of CFRP strips and elevated temperature as groove technique.http://www.sciencedirect.com/science/article/pii/S2214509521000024CFRP stripsElevated temperatureGroovesReinforced concrete beamsCarbon fiberDebonding |
| spellingShingle | Rajai Z. Al-Rousan Impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with CFRP composites Case Studies in Construction Materials CFRP strips Elevated temperature Grooves Reinforced concrete beams Carbon fiber Debonding |
| title | Impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with CFRP composites |
| title_full | Impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with CFRP composites |
| title_fullStr | Impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with CFRP composites |
| title_full_unstemmed | Impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with CFRP composites |
| title_short | Impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with CFRP composites |
| title_sort | impact of elevated temperature and anchored grooves on the shear behavior of reinforced concrete beams strengthened with cfrp composites |
| topic | CFRP strips Elevated temperature Grooves Reinforced concrete beams Carbon fiber Debonding |
| url | http://www.sciencedirect.com/science/article/pii/S2214509521000024 |
| work_keys_str_mv | AT rajaizalrousan impactofelevatedtemperatureandanchoredgroovesontheshearbehaviorofreinforcedconcretebeamsstrengthenedwithcfrpcomposites |