Dual potential capacity model for reinforced concrete beams subjected to shear
| Autor: | Deuck Hang Lee, Sun Jin Han, Kang Su Kim |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry 0211 other engineering and technologies Shear resistance 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Dowel Reinforced concrete 0201 civil engineering Crack closure Flexural strength Shear (geology) Mechanics of Materials 021105 building & construction General Materials Science Concentration factor business Reinforcement Civil and Structural Engineering |
| Zdroj: | Structural Concrete. 17:443-456 |
| ISSN: | 1464-4177 |
| Popis: | The shear resistance mechanisms of a reinforced concrete (RC) member with shear reinforcement can be divided into the contributions of the concrete and the shear reinforcement. The shear resistance mechanisms of concrete can be further divided into the shear resistance of the intact concrete in the compression zone, the aggregate interlock in the cracked tension zone and the dowel action of the longitudinal tension reinforcement. The shear demand curves and potential shear capacity curves for both tension and compression zones have been derived in this study, with the assumption that the shear failures of RC members are dominated by the flexural-shear strength. The shear capacity model was also proposed on this basis. In the proposed model, the crack width and the local stress increase in reinforcement were calculated based on the bond behaviour between the reinforcement and its surrounding concrete. Further, the crack concentration factor was introduced to consider the formation and propagation of the critical shear crack that developed from the flexural cracks. The results of a total of 1,018 shear tests were collected and compared with the analysis results provided by the proposed model. It was demonstrated that the proposed model provides a good estimate of the shear strengths of RC beams. |
| Databáze: | OpenAIRE |
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