Experimental tests of two-span continuous concrete deep beams reinforced with GFRP bars and strut-and-tie method evaluation
| Autor: | Therese Sheehan, Othman Hameed Zinkaah, Ashraf F. Ashour |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Load capacity
Materials science business.industry 02 engineering and technology Structural engineering Fibre-reinforced plastic 021001 nanoscience & nanotechnology Span (engineering) Method evaluation Shear (sheet metal) 020303 mechanical engineering & transports 0203 mechanical engineering Ceramics and Composites Shear strength 0210 nano-technology Reinforcement business Civil and Structural Engineering |
| Zdroj: | Composite Structures. 216:112-126 |
| ISSN: | 0263-8223 |
| DOI: | 10.1016/j.compstruct.2019.02.078 |
| Popis: | Test results of nine continuous concrete deep beams reinforced with GFRP bars and one specimen reinforced with steel rebars are reported. The investigated parameters included shear span-to-overall depth ratio ( a / h ), size effect and web reinforcement ratio. Two a / h ratios of 1.0 and 1.7 and three section heights of 300 mm, 600 mm and 800 mm as well as two web reinforcement ratios of 0% and 0.4% were used. The experimental results highlighted that the web reinforcement ratio improved the load capacities by about 10% and 18% for specimens having a / h ratio of 1.0 and 1.7, respectively. Additionally, a considerable reduction in shear strength occurred due to the increase of the section depth from 300 mm to 600 mm. The comparisons between the test results and those calculated using the strut-and-tie methods of the American (ACI 318-2014), European (EC2-2004) and Canadian (S806-2012) codes showed that the American code gave unsafe predictions, while the predictions of the Canadian code underestimated the load capacity of the beams tested. The European code provided the closest predictions to the test results; however, all codes presented do not consider the influence of section depth and/or web reinforcement on the shear strength, the impacts of which were confirmed experimentally. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect