Experimental investigation on shear resistance of self-consolidating concrete beams

Savaris, Gustavo; Pinto, Roberto Caldas de Andrade

doi:10.1590/s1983-41952019000600005

Cited by 3 publications

(3 citation statements)

References 6 publications

(2 reference statements)

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“…As discussed before, similar shear strength may be associated to a higher bond to the reinforcing bars in self-consolidating concrete, that would increase the compressive force applied by the reinforcement to the crack surfaces, increasing shear transfer by friction, and therefore, compensating the lower aggregate interlock. This effect was also observed in Savaris and Pinto [19] were self-consolidating beams with stirrups presented similar shear strength to conventional concrete, compensating lower shear strength presented by beams without stirrups. 11 show the relationship between shear forces and crack widths for all specimens.…”

Section: Shear Resistancesupporting

confidence: 63%

Shear friction capacity of self-consolidating concrete

Savaris

Pinto

2021

Rev. IBRACON Estrut. Mater.

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An experimental research was developed to evaluate shear transfer in self-consolidating. Three concrete mixes were prepared, one conventional and two self-consolidating, differing on the proportion of the coarse and fine aggregate used. Nine push-off specimens, containing steel reinforcement passing through the shear plane, were tested, to evaluate the ultimate shear stress and shear plane displacements. Shear strength of self-consolidating concrete specimens were higher than conventionally vibrated concrete. The experimental results were compared to the shear strength estimated by literature and code based equations, yielding conservative results of these equations for both types of concrete, especially the models that disregard the compressive strength of concretes.

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Section: Shear Resistancesupporting

confidence: 63%

Shear friction capacity of self-consolidating concrete

Savaris

Pinto

2021

Rev. IBRACON Estrut. Mater.

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“…Although the w/c ratio was the same in the two mixtures, it was verified that the SCC presented compressive and tensile strength greater than the CC. This difference can be attributed to a better compaction and the improvement in the transition zone due to the higher content of fine materials in the SCC [25][26][27].…”

Section: Concretes Propertiesmentioning

confidence: 99%

Evaluation of direct shear strength of self-consolidating and conventional concretes

et al. 2021

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The self-consolidating concrete presents properties that improve the constructive process, it has the main characteristic of flowing under its own weight and completely filling the formwork, without the need of compaction. However, the uncertainty about its shear strength, due to the differences in coarse aggregate volume and size of this concrete compared to conventional vibrated concrete, is one of the main barriers to its acceptance. Self-consolidating concrete mixtures requires generally the reduction of coarse aggregate content and addition of fines materials to obtain flowability and the reduction of particles size directly influences the mechanism of aggregate interlock. In this work, two concrete mixtures, conventional and self-consolidating, were used for casting test specimens, submitted to the direct shear test, in order to evaluate the direct shear strength of these concretes. The results showed a reduction of the shear strength for the self-compacting concrete, attributed to the use of coarse aggregate with smaller particle size, the reduced volume of coarse aggregate and the larger fines content in the mixture. The experimental results were compared with equations proposed in the literature, demonstrating that for self-consolidating concrete these equations underestimate the ultimate shear strengths. Thus, this work contributes to the formation of a database aiming the establishment of equations to estimate self-consolidating concrete shear strength.

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“…The primary shear resistance mechanisms are the uncracked compressive zone of the concrete, physical models ("beam action" and "arch action"), friction between crack surfaces because of aggregate interlock, dowel action of longitudinal reinforcement, and residual tensile stress on cracks. However, according to Savaris and Pinto (2019), the degree of importance of each of these mechanisms to shear strength is a controversial topic. reinforcement Sergio Luis González Garcia et al…”

Section: Shear Resistance Mechanismsmentioning

confidence: 99%

Shear behavior of lightweight self-consolidating reinforced concrete beams without transverse reinforcement

Garcia

Lannes

Carneiro

et al. 2020

Lat. Am. j. solids struct.

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This article investigates the shear behavior of reinforced concrete beams without transverse reinforcement. Two types of concrete were produced: a Reference Conventional Concrete (RCC) and a Lightweight Self-Consolidating Concrete (LSCC), all with an average 28-day compressive strength (fc) of approximately 30 MPa and characterized by rheological and mechanical tests. Twelve 15 x 30 x 200 cm beams were manufactured for shear failure during a four-point bending test. Concrete properties, longitudinal reinforcement ratios (0.89%, 1.27% and 1.68%) and shear-span to depth ratio (1.87 to 2.71) were determined. The studied beams were compared in terms of cracking pattern, diagonal cracking load, shear strength, specific concrete and longitudinal reinforcement deformation at failure. The strength values obtained experimentally were compared with ABNT NBR 6118 (2014), ACI 318 (2019) and CEN EC-2 (2004). The tested beams of LSCC showed less shear strength when compared to beams of RCC.

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Experimental investigation on shear resistance of self-consolidating concrete beams

Cited by 3 publications

References 6 publications

Shear friction capacity of self-consolidating concrete

Shear friction capacity of self-consolidating concrete

Evaluation of direct shear strength of self-consolidating and conventional concretes

Shear behavior of lightweight self-consolidating reinforced concrete beams without transverse reinforcement

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