Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips
Torsion is resisted well by locked system of reinforcement, due to the blood nature of the torsion induced-shear flow stresses in a beam. Therefore, it will be more effective to have strengthening schemes, which are wrapped in closed form around the cross section. But strengthening with U wrap (thre...
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| Format: | Article |
| Language: | English |
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Elsevier
2017-12-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509517300232 |
| _version_ | 1819117630391320576 |
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| author | Rafid Saeed Atea |
| author_facet | Rafid Saeed Atea |
| author_sort | Rafid Saeed Atea |
| collection | DOAJ |
| description | Torsion is resisted well by locked system of reinforcement, due to the blood nature of the torsion induced-shear flow stresses in a beam. Therefore, it will be more effective to have strengthening schemes, which are wrapped in closed form around the cross section. But strengthening with U wrap (three sides) or strengthening in the web and flange unconnectedly is more useful because of the unreachability of the entire cross section due to addition of flange in uniform beam – slab construction (T section of interior beam).
This work aims at studying the strengthening of T beams in torsion by using carbon fiber reinforced polymer (CFRP). The CFRP laminates will be used for strengthening previous to loading. The experimental work includes investigation of twelve reinforced concrete T beams tested under pure torsion. The first beam was the reference beam, without CFRP. The second beam was a simple concrete beam. The remaining ten beams. Variables considered in the test program include; effect of flange strengthening, effect of fiber orientation (90° or 45° CFRP strips with respect to the longitudinal axis), effect of using additional longitudinal CFRP strips with transverse CFRP strips, effect of bolt anchoring CFRP strips in the web and flange and effect of continuous CFRP strips between web and flange (isolated T section). Test results were discussed based on torque – twist behavior, beam elongations, CFRP strain, concrete strain and influence of CFRP on cracking torque, ultimate torque and failure modes. |
| first_indexed | 2024-12-22T05:36:02Z |
| format | Article |
| id | doaj.art-ff6c0ad68cc842dd86c5e0de023d5190 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-12-22T05:36:02Z |
| publishDate | 2017-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-ff6c0ad68cc842dd86c5e0de023d51902022-12-21T18:37:20ZengElsevierCase Studies in Construction Materials2214-50952017-12-017C11011710.1016/j.cscm.2017.03.002Torsional behavior of reinforced concrete T-beams strengthened with CFRP stripsRafid Saeed AteaTorsion is resisted well by locked system of reinforcement, due to the blood nature of the torsion induced-shear flow stresses in a beam. Therefore, it will be more effective to have strengthening schemes, which are wrapped in closed form around the cross section. But strengthening with U wrap (three sides) or strengthening in the web and flange unconnectedly is more useful because of the unreachability of the entire cross section due to addition of flange in uniform beam – slab construction (T section of interior beam). This work aims at studying the strengthening of T beams in torsion by using carbon fiber reinforced polymer (CFRP). The CFRP laminates will be used for strengthening previous to loading. The experimental work includes investigation of twelve reinforced concrete T beams tested under pure torsion. The first beam was the reference beam, without CFRP. The second beam was a simple concrete beam. The remaining ten beams. Variables considered in the test program include; effect of flange strengthening, effect of fiber orientation (90° or 45° CFRP strips with respect to the longitudinal axis), effect of using additional longitudinal CFRP strips with transverse CFRP strips, effect of bolt anchoring CFRP strips in the web and flange and effect of continuous CFRP strips between web and flange (isolated T section). Test results were discussed based on torque – twist behavior, beam elongations, CFRP strain, concrete strain and influence of CFRP on cracking torque, ultimate torque and failure modes.http://www.sciencedirect.com/science/article/pii/S2214509517300232Composite constructionReinforced concrete beamT-beam sectionCarbon fiber Reinforced polymerMid-span deflection |
| spellingShingle | Rafid Saeed Atea Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips Case Studies in Construction Materials Composite construction Reinforced concrete beam T-beam section Carbon fiber Reinforced polymer Mid-span deflection |
| title | Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips |
| title_full | Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips |
| title_fullStr | Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips |
| title_full_unstemmed | Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips |
| title_short | Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips |
| title_sort | torsional behavior of reinforced concrete t beams strengthened with cfrp strips |
| topic | Composite construction Reinforced concrete beam T-beam section Carbon fiber Reinforced polymer Mid-span deflection |
| url | http://www.sciencedirect.com/science/article/pii/S2214509517300232 |
| work_keys_str_mv | AT rafidsaeedatea torsionalbehaviorofreinforcedconcretetbeamsstrengthenedwithcfrpstrips |