A Minimum Ductility Design Method For Non-Rectangular High-Strength Concrete Beams
Material type: ArticleDescription: 115-130 pISSN:- 1598-8198
Item type | Current library | Call number | Vol info | Status | Date due | Barcode |
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Articles | Periodical Section | Vol.1, No.2 (May 2004) | Available |
The flexural ductility of solid rectangular reinforced concrete beams has been studied quite extensively. However, many reinforced concrete beams are neither solid nor rectangular, examples includeT-, -, - and box-shaped beams. There have been few studies on the flexural ductility of nonrectangular reinforced concrete beams and as a result little is known about the possible effect of sectional shape on flexural ductility. Herein, the effect of sectional shape on the post-peak flexural behaviour of reinforced normal and high-strength concrete beams has been studied using a newly developed analysis method that employs the actual stress-strain curves of the constitutive materials and takes into account the stress-path dependence of the stress-strain curve of the steel reinforcement. It was revealed that the sectional shape could have significant effect on the flexural ductility of a concrete beam and that the flexural ductility of a T-,T-, II- or box-shaped beam is generally lower than that of a solid rectangular beam with the same overall dimensions and the same amount of reinforcement provided. Based on the numerical results obtained, a simple method of ensuring the provision of a certain minimum level of flexural ductility to non-rectangular concrete beams has been developed.