Torsional strength of normal and high strength reinforced concrete beams

Rahal, Khaldoun N.

doi:10.1016/j.engstruct.2013.09.005

Cited by 40 publications

(40 citation statements)

References 9 publications

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“…In such circumstances, the curved members will be eccentrically loaded, which will induce torsion in the members. Examples of torsion-loaded structures include utility poles, eccentrically loaded box bridge girders, spiral staircases, spandrel beams in building frames and curved beams [1]. The torsion force normally occurs by combining with the flexure and shear forces.…”

Section: Introductionmentioning

confidence: 99%

“…In structures with the combined forces, the design procedures are normally based on the force interactions, and, hence, the behaviours of the members under pure torsion need to be known and quantified [2]. There have been numerous studies concerning the torsional resistance of concrete in recent years [1][2][3][4][5][6][7][8][9]. The studies showed the significance of the torsion design.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of fibre aspect ratio on the torsional behaviour of steel fibre-reinforced normal weight concrete and lightweight concrete

Yap¹,

Khaw²,

Alengaram³

et al. 2015

Engineering Structures

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of fibre aspect ratio on the torsional behaviour of steel fibre-reinforced normal weight concrete and lightweight concrete

Yap¹,

Khaw²,

Alengaram³

et al. 2015

Engineering Structures

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“…is means controlling the crack width and securing enough ductility to prevent sudden loss of the torsional strength after cracking. Numerous researchers, however, already pointed out the issues resulting from the behavioral change brought by the increase of the strength or related to the minimum torsional reinforcement ratio recommended by ACI 318-14 Code or Eurocode 2 (EC 2) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Torsional Behavior of High‐Strength Concrete Beams with Minimum Reinforcement Ratio

Joh

Kwahk

Lee

et al. 2019

Advances in Civil Engineering

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Although there is a growing trend to use higher strength for concrete and steel in reinforced concrete structures due to the lightness and slenderness of these members together with the simplified arrangement of their reinforcement, there is still the necessity to inspect the reduction of ductility resulting from the gain in strength. Taking into account that this also concerns the design for torsion, this study intends to investigate the regulations related to the torsional minimum reinforcement ratio in view of the minimum ductility requirement with focus on Eurocode 2. To that goal, the relation between the torsional cracking moment and the ductile behavior is discussed for the beam reinforced with the minimum torsional reinforcement ratio to examine the eventual properness of the minimum torsional reinforcement ratio recommended by Eurocode 2. Moreover, a pure torsion test is performed on 18 beams made of 80 MPa concrete reinforced by high-strength bars with rectangular section and various test variables involving the minimum torsional reinforcement ratio, the transverse-to-longitudinal reinforcement ratio, and the total reinforcement ratio. As a result, for the high-strength concrete beams, the minimum torsional reinforcement ratio recommended by Eurocode 2 was insufficient to prevent the sudden loss of strength after the initiation of the torsional cracking. But with regard to the compatibility torsion of statically indeterminate structure, the adoption of the minimum torsional reinforcement ratio recommended by Eurocode 2 might secure enough deformability under displacement-controlled mode to allow the redistribution of the torsional moment.

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“…The structural elements that are subjected to torsional forces include utility poles, eccentrically loaded box bridge girders, spiral staircases, spandrel beams in the frames of buildings, and beams that are curved in plan, as well as earthquake-resistant structures. [21][22][23] The recent trend in structural design has changed and the aesthetic design concept with an increase in the number of curved members incorporated. In such a case, the torsion characteristics of the structural members have to be considered to prevent the occurrence of torsional cracking.…”

Section: Introductionmentioning

confidence: 99%

Torsional and cracking characteristics of steel fiber-reinforced oil palm shell lightweight concrete

Yap

Alengaram

Jumaat

et al. 2015

Journal of Composite Materials

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The study presents the investigations of the torsional behavior and crack resistance of a sustainable lightweight oil palm shell (OPS) concrete. In the comparison between the OPS concrete (OPSC) and normal weight concrete (NWC), the torsional failure of the NWC was sudden and brittle, while the OPSC exhibited post-cracking behavior. The second part of the study examines the effect of steel fibers of 0.25–1.00% in the OPSC to produce OPS fiber-reinforced concrete (OPSFRC). Improved mechanical properties and reduced brittleness were reported in the OPSFRC mixes. The addition of 1% steel fibers in the OPSC-100 mix produced the highest compressive and flexural strengths of 47 MPa and 8.2 MPa, respectively. The steel fibers up to 1% enhanced the ultimate torque, torsional toughness, and twist at failure of the OPSFRC specimens by 60%, 1000%, and 550%, respectively. The addition of steel fibers significantly improved the crack resistance of the OPSFRC specimens.

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Torsional strength of normal and high strength reinforced concrete beams

Cited by 40 publications

References 9 publications

Effect of fibre aspect ratio on the torsional behaviour of steel fibre-reinforced normal weight concrete and lightweight concrete

Effect of fibre aspect ratio on the torsional behaviour of steel fibre-reinforced normal weight concrete and lightweight concrete

Torsional Behavior of High‐Strength Concrete Beams with Minimum Reinforcement Ratio

Torsional and cracking characteristics of steel fiber-reinforced oil palm shell lightweight concrete

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