Ma, Shengqiang and Muhamad Bunnori, Norazura and Choong, Kok Keong (2022) Torsional behaviour of RC box beams strengthened by CFRP under combined shear and torsion. Proceedings of the Institution of Civil Engineers: Structures and Buildings, 175 (12). pp. 950-964. ISSN 0965-0911, DOI https://doi.org/10.1680/jstbu.20.00072.
Full text not available from this repository.Abstract
A preliminary experimental investigation of box-section reinforced concrete (RC) beams strengthened with carbon-fibre-reinforced polymer (CFRP) under shear and torsion was carried out. Based on different torque-to-shear ratios (TSRs) (0.958, 1.597, and 2.556), 12 box-section specimens were divided into three groups. In each group, one beam was a non-strengthened control while the other three beams were strengthened with CFRP U-jackets or CFRP U-jackets and longitudinal strips. Tests on the beams showed that the average cracking angle at the ultimate state was inversely proportional to the TSR. Two failure patterns were observed: debonding in the beams strengthened with U-jackets and fracture in the beams strengthened with both U-jackets with longitudinal strips. At the ultimate state, the best improvement in torsional capacity was achieved in the specimens retrofitted with longitudinal strips bonded on the U-wrapping strips. Equations using a modified effective strain expression were developed to compute the ultimate torque of all the specimens, the results of which were in good agreement to existing experimental data.
| Item Type: | Article |
|---|---|
| Funders: | Special Funds for Central University Basic Scientific Research Business Expenses (Grant No: CHD300102219525), Universiti Sains Malaysia (Grant No: 1001/PAWAM/814215) |
| Uncontrolled Keywords: | Beams & girders; Rehabilitation; Reclamation & renovation; Strength & testing of materials |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction |
| Divisions: | Faculty of Engineering > Department of Civil Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 23 Nov 2023 04:52 |
| Last Modified: | 23 Nov 2023 04:52 |
| URI: | http://eprints.um.edu.my/id/eprint/40296 |
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