Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion
The present study focuses on the torsional strengthening behavior of reinforced concrete (RC) box section beams that are widely used in bridges. Four RC box beams were fabricated, and three of them were wrapped by carbon fiber-reinforced polymer (CFRP) U-wrap strips with or without longitudinal s...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2016
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| Subjects: | |
| Online Access: | http://eprints.usm.my/38386/1/Behavior_of_Reinforced_Concrete_Box_Beam_Strengthened.pdf |
| _version_ | 1797010022027231232 |
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| author | Ma, Shengqiang Bunnori, N. Muhamad Choong, K. K. |
| author_facet | Ma, Shengqiang Bunnori, N. Muhamad Choong, K. K. |
| author_sort | Ma, Shengqiang |
| collection | USM |
| description | The present study focuses on the torsional strengthening behavior of reinforced
concrete (RC) box section beams that are widely used in bridges. Four RC box beams were
fabricated, and three of them were wrapped by carbon fiber-reinforced polymer (CFRP)
U-wrap strips with or without longitudinal strips. The different wrapping configuration,
cracking angle, failure pattern, and tensile strain of fibers were investigated and discussed
accordingly. The experimental results addressed that U-wrap strips strengthening also can
upgrade the ultimate torque of beams moderately. In particular, using U-wrap and longitudinal
strips to bond the box beams increased the torsional stiffness slightly. The same equation from
different codes for calculating RC specimens can accurately predict the ultimate strength of the
control beam, but the calculation of the fib model overestimated the torsional strengthening
improvement of the wrapped specimens. However, Ghobarah et al. assumed approximately
3000με of the average ultimate fiber strain in calculating the ultimate strength of the wrapped
box beams which shows in relatively appropriate agreement with testing results. |
| first_indexed | 2024-03-06T15:13:51Z |
| format | Article |
| id | usm.eprints-38386 |
| institution | Universiti Sains Malaysia |
| language | English |
| last_indexed | 2024-03-06T15:13:51Z |
| publishDate | 2016 |
| publisher | EDP Sciences |
| record_format | dspace |
| spelling | usm.eprints-383862018-01-16T04:57:18Z http://eprints.usm.my/38386/ Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion Ma, Shengqiang Bunnori, N. Muhamad Choong, K. K. TA1-2040 Engineering (General). Civil engineering (General) The present study focuses on the torsional strengthening behavior of reinforced concrete (RC) box section beams that are widely used in bridges. Four RC box beams were fabricated, and three of them were wrapped by carbon fiber-reinforced polymer (CFRP) U-wrap strips with or without longitudinal strips. The different wrapping configuration, cracking angle, failure pattern, and tensile strain of fibers were investigated and discussed accordingly. The experimental results addressed that U-wrap strips strengthening also can upgrade the ultimate torque of beams moderately. In particular, using U-wrap and longitudinal strips to bond the box beams increased the torsional stiffness slightly. The same equation from different codes for calculating RC specimens can accurately predict the ultimate strength of the control beam, but the calculation of the fib model overestimated the torsional strengthening improvement of the wrapped specimens. However, Ghobarah et al. assumed approximately 3000με of the average ultimate fiber strain in calculating the ultimate strength of the wrapped box beams which shows in relatively appropriate agreement with testing results. EDP Sciences 2016-04 Article PeerReviewed application/pdf en http://eprints.usm.my/38386/1/Behavior_of_Reinforced_Concrete_Box_Beam_Strengthened.pdf Ma, Shengqiang and Bunnori, N. Muhamad and Choong, K. K. (2016) Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion. MATEC Web of Conferences, 47 (02002). pp. 1-8. ISSN 2261-236X https://doi.org/10.1051/matecconf/20164702002 |
| spellingShingle | TA1-2040 Engineering (General). Civil engineering (General) Ma, Shengqiang Bunnori, N. Muhamad Choong, K. K. Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion |
| title | Behavior of Reinforced Concrete Box Beam Strengthened
with CFRP U-Wrap Strips Under Torsion |
| title_full | Behavior of Reinforced Concrete Box Beam Strengthened
with CFRP U-Wrap Strips Under Torsion |
| title_fullStr | Behavior of Reinforced Concrete Box Beam Strengthened
with CFRP U-Wrap Strips Under Torsion |
| title_full_unstemmed | Behavior of Reinforced Concrete Box Beam Strengthened
with CFRP U-Wrap Strips Under Torsion |
| title_short | Behavior of Reinforced Concrete Box Beam Strengthened
with CFRP U-Wrap Strips Under Torsion |
| title_sort | behavior of reinforced concrete box beam strengthened with cfrp u wrap strips under torsion |
| topic | TA1-2040 Engineering (General). Civil engineering (General) |
| url | http://eprints.usm.my/38386/1/Behavior_of_Reinforced_Concrete_Box_Beam_Strengthened.pdf |
| work_keys_str_mv | AT mashengqiang behaviorofreinforcedconcreteboxbeamstrengthenedwithcfrpuwrapstripsundertorsion AT bunnorinmuhamad behaviorofreinforcedconcreteboxbeamstrengthenedwithcfrpuwrapstripsundertorsion AT choongkk behaviorofreinforcedconcreteboxbeamstrengthenedwithcfrpuwrapstripsundertorsion |