Design of Reinforced Concrete Elements Using High Strength Concretes
IR@SERC: CSIR-Structural Engineering Research Centre, Chennai
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Title |
Design of Reinforced Concrete Elements Using High Strength Concretes
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Creator |
Lakshmanan, N.
Gopalakrishnan, S. |
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Subject |
Reinforced concrete
High strength cements Code |
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Description |
With the availability of high strength cements, a wide variety of concrete chemicals and supplementary cementi-
tious materials, it has become feasible to achieve strengths of the order of 60 MPa to 80 MPa for concrete mixtures.
The Indian Standard Code of Practice for plain and reinforced concrete IS:456-2000
1
has categorized concretes
having strengths in the range 20 MPa to 50 MPa as standard concrete and 60 MPa to 80 MPa as high strength
concrete. Realizing that the codal recommendations on strengths have been based on tests conducted on normal
concretes, an exhaustive experimental programme was undertaken at SERC, Chennai, on high strength rein-
forced concrete flexural elements, which clearly indicated the need for a certain minimum level of compression
reinforcement. The paper details a design procedure which needs to be incorporated in the Codes of Practice. The
procedure envisages at least a minimum plastic hinge rotation of 0.015 be sustained at the peak load.
A minimum confinement of concrete is considered essential in reinforced concrete beams having high strength
concrete to achieve the above objective together with a minimum amount of compression steel. It is clearly seen from
the experiments that having more confinement steel without adequate compression reinforcement is ineffective.
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Date |
2009
2009 2005 |
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Type |
Article
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Identifier |
Journal of Structural Engineering, Vol.31, No.4, January-March 2005, pp.299-303
http://hdl.handle.net/123456789/369 |
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Language |
en
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Rights |
It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
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Publisher |
Structural Engineering Research Center, Chennai
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