Effect of cross-sectional area of Reinforcement on Ultimate Shear Strength of RC Deep Beams
The behavior of RC deep beams in shear failure is different from convention beams, and consequently, the design methods and analysis of these beams are different. Strut-and-tie Model (STM) is used to model the compression flow within the concrete strut. A series of simply supported deep beam were...
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Online Access: | http://eprints.intimal.edu.my/1084/ http://eprints.intimal.edu.my/1084/1/BCEGI%2030.pdf |
| Summary: | The behavior of RC deep beams in shear failure is different from convention beams, and consequently, the design methods and analysis of these beams are different. Strut-and-tie Model (STM) is used to model the compression flow within the concrete strut. A series of simply supported deep beam were analyzed to seek how the shear span-to effective-depth ratio (a/d), transverse reinforcement, longitudinal reinforcement as well as the size of cross-sectional reinforcement affect the ultimate shear strength of reinforced concrete deep beam. A Free licensed software called "CAST" is used to draw and analyze the (STM) of RC deep beam. Based on the results, when the shear span-to-effective-depth ratio (a/d) increase, the ultimate shear strength decreases; and observed that increasing in concrete strength effect more on the ultimate shear strength when (a/d>1) compare to (a/d < 1) which has a lesser effect. Furthermore , and increment in the ultimate shear strength occurs when the amount of reinforcement, bar designation and the number of bars are increasing. However, shear strength ratio slightly decreases for (a/d < 0.5) and this is due to large effective transverse compression. The results obtained that by increasing the amount of shear reinforcement after a certain level, the shear strength of deep beam will be ineffective , and when the transverse reinforcement ratio exceeds a certain value, the ultimate shear strength of RC deep beams does not increase. |
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