An experimental investigation of the stress-strain distribution in high strength concrete deep beams

Mohammad, M. and Jumaat, Mohd Zamin and Chemrouk, M. and Ghasemi, A. and Hakim, S.J.S. and Najmeh, R. (2011) An experimental investigation of the stress-strain distribution in high strength concrete deep beams. In: 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12, 2011, Hong Kong.

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This paper discusses the behaviour, design and analysis of high strength reinforced concrete (HSC) deep beams regarding the neutral axis variation. The study of this structural element is motivated by the lack of a clear procedure for the design of these structural elements, which have many useful applications such as in foundations, in offshore structures, in tall buildings and in bridges. It should be noted however, that the design of these structural elements is not covered sufficiently by the existing codes of practices. For example, the British code BS8110 explicitly states that, for design of deep beams, reference should be made to specialist literature. Other codes such as the ACI, the draft Euro code EC/2, the Canadian code and the CIRIA guide No.2b present some design guidelines based on empirical analysis. The present research consists of six HSC deep beams designed and casted with self compacted concrete (SCC). The main goal of this research is to study the stress-strain distribution along the beam section at mid-span and discuss the variation of the neutral axis within the depth. Sufficient horizontal and vertical web reinforcement are used to ensure tensile reinforcement yielding before shear failure. It was decided to keep the beam's length, depth and thickness constant while varying the tensile reinforcement percentage. Strain gauges have been attached on the concrete surface, on the tensile reinforcement and on the horizontal and vertical web bars to monitor the strains, both in concrete and in the different reinforcement bars. The data show clearly that the distribution of strains, and hence of stresses, in the deep beams studied is completely different from the linear one, commonly accepted for ordinary.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Conference code: 86909 Export Date: 6 January 2013 Source: Scopus doi: 10.1016/j.proeng.2011.07.269 Language of Original Document: English Correspondence Address: Mohammad, M.; Department of Civil Engineering, University of MalayaMalaysia; email: References: Shear strength of reinforced concrete members (1973) Proceedings ASCE, 99 (ST6), pp. 1091-187. , ACI-ASCE Committee 426 Reaffirmed in 1980 and published by ACI as Publication No. 426R-74; Structural use of concrete (1985) BS 8110: Part 1. Code of Practice for Design and Construction, , British Standard Institution, BSI, London; Franz, D., Beitrag zur theorie der halscheib und des wandartigen balkens (1932) Publications, International Association for Bridge and Structural Engineering, 1, pp. 69-93; Design of deep girder Concrete Information NO. ST66, , Portland cements Association, Chicago; Li, C., Conway, H.D., Winter, G., Stress in deep beam (1952) Proceedings, ASCE, 78 (127). , Separate, May; Kaar, P.H., STRESSES in centrally loaded deep beams (1957) Proceedings, Society for Experimental Stress Analysis, 15 (1), p. 77; Mohammad, M., (2010) Stress Distribution in High Strength Concrete Deep Beam, , Proceeding PhD thesis, University Malaya; Design of concrete structure A23.3-94 (1994) Rexdale, 199p. , Canadian Standards Association
Uncontrolled Keywords: Beam sections, Codes of practice, Concrete surface, Deep beam, Design and analysis, Design guidelines, Empirical analysis, Experimental investigations, High strength concretes, High-strength reinforced concrete, Neutral axis, Reinforcement bar, Shear failure, Stress-strain distributions, Structural elements, Tensile reinforcement, Web reinforcement, Composite structures, Elasticity, Gages, Offshore structures, Reinforced concrete, Reinforcement, Structural design, Tall buildings, User interfaces, Strain.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 07 May 2013 01:07
Last Modified: 05 Feb 2020 04:21

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