Flexural Strengthening of RC Slabs Using a Hybrid FRP-UHPC System Including Shear Connector
A polymeric hybrid composite system made of UHPC and CFRP was proposed as a retrofit system to enhance flexural strength and ductility of RC slabs. While the effectiveness of the proposed system was confirmed previously through testing three full-scale one-way slabs having two continuous spans, the...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/4387545 |
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| author | Jiho Moon Mahmoud M. Reda Taha Jung J. Kim |
| author_facet | Jiho Moon Mahmoud M. Reda Taha Jung J. Kim |
| author_sort | Jiho Moon |
| collection | DOAJ |
| description | A polymeric hybrid composite system made of UHPC and CFRP was proposed as a retrofit system to enhance flexural strength and ductility of RC slabs. While the effectiveness of the proposed system was confirmed previously through testing three full-scale one-way slabs having two continuous spans, the slabs retrofitted with the hybrid system failed in shear. This sudden shear failure would stem from the excessive enhancement of the flexural strength over the shear strength. In this study, shear connectors were installed between the hybrid system and a RC slab. Using simple beam, only positive moment section was examined. Two full-scale RC slabs were cast and tested to failure: the first as a control and the second using this new strengthening technique. The proposed strengthening system increased the ultimate load carrying capacity of the slab by 70%, the stiffness by 60%, and toughness by 128%. The efficiency of shear connectors on ductile behavior of the retrofitted slab was also confirmed. After the UHPC top is separated from the slab, the shear connector transfer shear load and the slab system were in force equilibrium by compression in UHPC and tension in CFRP. |
| format | Article |
| id | doaj-art-1132fe621a0640cab59f64b18bc1cb12 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-1132fe621a0640cab59f64b18bc1cb122025-02-03T01:23:39ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/43875454387545Flexural Strengthening of RC Slabs Using a Hybrid FRP-UHPC System Including Shear ConnectorJiho Moon0Mahmoud M. Reda Taha1Jung J. Kim2Department of Civil Engineering, Kangwon National University, Chuncheon-si, Gangwon-do 24341, Republic of KoreaDepartment of Civil Engineering, University of New Mexico, MSC01 1070, Albuquerque, NM 87131-0001, USADepartment of Civil Engineering, Kyungnam University, 7 Kyungnamdaehak-ro, Changwon-si 51767, Republic of KoreaA polymeric hybrid composite system made of UHPC and CFRP was proposed as a retrofit system to enhance flexural strength and ductility of RC slabs. While the effectiveness of the proposed system was confirmed previously through testing three full-scale one-way slabs having two continuous spans, the slabs retrofitted with the hybrid system failed in shear. This sudden shear failure would stem from the excessive enhancement of the flexural strength over the shear strength. In this study, shear connectors were installed between the hybrid system and a RC slab. Using simple beam, only positive moment section was examined. Two full-scale RC slabs were cast and tested to failure: the first as a control and the second using this new strengthening technique. The proposed strengthening system increased the ultimate load carrying capacity of the slab by 70%, the stiffness by 60%, and toughness by 128%. The efficiency of shear connectors on ductile behavior of the retrofitted slab was also confirmed. After the UHPC top is separated from the slab, the shear connector transfer shear load and the slab system were in force equilibrium by compression in UHPC and tension in CFRP.http://dx.doi.org/10.1155/2017/4387545 |
| spellingShingle | Jiho Moon Mahmoud M. Reda Taha Jung J. Kim Flexural Strengthening of RC Slabs Using a Hybrid FRP-UHPC System Including Shear Connector Advances in Materials Science and Engineering |
| title | Flexural Strengthening of RC Slabs Using a Hybrid FRP-UHPC System Including Shear Connector |
| title_full | Flexural Strengthening of RC Slabs Using a Hybrid FRP-UHPC System Including Shear Connector |
| title_fullStr | Flexural Strengthening of RC Slabs Using a Hybrid FRP-UHPC System Including Shear Connector |
| title_full_unstemmed | Flexural Strengthening of RC Slabs Using a Hybrid FRP-UHPC System Including Shear Connector |
| title_short | Flexural Strengthening of RC Slabs Using a Hybrid FRP-UHPC System Including Shear Connector |
| title_sort | flexural strengthening of rc slabs using a hybrid frp uhpc system including shear connector |
| url | http://dx.doi.org/10.1155/2017/4387545 |
| work_keys_str_mv | AT jihomoon flexuralstrengtheningofrcslabsusingahybridfrpuhpcsystemincludingshearconnector AT mahmoudmredataha flexuralstrengtheningofrcslabsusingahybridfrpuhpcsystemincludingshearconnector AT jungjkim flexuralstrengtheningofrcslabsusingahybridfrpuhpcsystemincludingshearconnector |