Behaviour of concrete under shear and normal stresses

Sonnenberg, Andrew M C; Al-Mahaidi, Riadh; Taplin, Geoff R

doi:10.1680/macr.55.4.367.37584

Cited by 7 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The equations presented by MATTOCK [16], SONNENBERG et al [17] and XU et al [18] for estimating the shear strength of the concrete were adequate for conventional concrete, however, they require adjustment for use with SCC, because it presents higher values than those obtained experimentally.…”

Section: Discussionmentioning

confidence: 99%

“…The experimental results obtained in this work were compared with the values calculated using the equations proposed by MATTOCK [16], SONNENBERG et al [17] and XU et al [18], and results are presented in Table 5. Conventional concrete theoretical ultimate shear strengths were lower than the values obtained experimentally, ensuring safety of the structures.…”

Section: Comparison Of Experimental and Theoretical Shear Resistancementioning

confidence: 99%

“…Using the Mohr-Coulomb theory to evaluate the ultimate capacity of concrete specimens, SONNEN-BERG et al [17] proposed Equation 2 to estimate the shear strength of uncracked concrete with normal stress acting on the shear plane of lower than 0.15 f c .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Comparison Of Experimental and Theoretical Shear Resistancementioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2021

View full text Add to dashboard Cite

show abstract

“…It used to be difficult and costly to determine these properties, particularly for high strength materials, but new inexpensive procedures have now been developed. [14][15][16][17][18][19][20][21][22] It is worth bearing in mind that the SF properties in Figure 2 can also be derived when the sliding plane in -Figure 1 is initially cracked, as in Walraven et al, 23 and also when the normal stress σ N is tensile such as in the work of Johal et al 24 Both an initial crack and a normal tensile stress reduce the shear resistance. As an example, the initially cracked concrete behavior is shown as the dashed line in Figure 2 where the shear to cause sliding V ui is much smaller than that of the uncracked concrete V u0 and is equal to zero when unconfined.…”

Section: Pi Shear-friction Materials Properties Of Concrete In Compre...mentioning

confidence: 99%

A displacement based approach for the analysis, development, and design of reinforced concrete

Oehlers

Visintin

2021

Structural Concrete

View full text Add to dashboard Cite

Prior to cracking, reinforced concrete (RC) has full-interaction (FI) behavior, that is there is negligible slip between adjacent elements. After cracking, the regions in the vicinity of a crack exhibit partial-interaction (PI), that is relative slip between elements occurs. RC development has in the past relied heavily on FI strain based approaches and, consequently, they are in general not able to directly simulate the PI behavior associated with RC. Because of this deficiency in simulation, safe design rules have had to be developed either empirically or semi-empirically using a vast amount of member level testing to calibrate correction factors which are applied to virtually all aspects of RC design. As a result of this reliance on experimental calibration, the application of these empirical rules is limited by the range of testing that has been undertaken and this creates a feedback loop necessitating the further testing of large scale elements. In this paper, it is shown that a displacement based approach, that is a PI approach, can directly simulate through mechanics the RC PI behaviors and, hence, significantly reduces the need for member testing required to develop design rules. It is shown how only material testing is required in order to quantify the member behavior which, consequently, should both reduce the cost of development and expedite the development of safe design rules for a particular type of fiber concrete. K E Y W O R D Sdisplacement based analysis, design philosophy, fibre reinforced concrete, reinforced concrete, prestressed concrete | INTRODUCTIONEuler-Bernoulli beam theory is most commonly applied on the basis of plane sections remaining plane with the corollary of a linear strain profile. The simplicity of dealing with strains (which generally allow for the smearing of localized behavior) rather than displacements (which require the consideration of localized behavior) has driven RC analysis, development and design until quite recently. [1][2][3][4][5][6][7][8][9][10][11][12][13] The underlying limitation of strain based approaches is that they, in general, are based on the assumption of full-interaction (FI) and therefore do not simulate directly the partial-interaction (PI) mechanisms that are observed in practice. To bridge the gap between the underlying assumption of FI and experimental observation, it has been necessary to develop empirical or semi-empirical correction or "fudge" factors such that the

show abstract

“…Sonnenberg et al [8] performed an experimental program using a shear box and compared the results with the Mohr-Coulomb frictional hypothesis, demonstrating that for normal stresses greater than 0.15 f c , a Mohr-Coulomb model with cohesion of 0.22 f c and a friction angle of 35° could be used to predict the results.…”

Section: Introductionmentioning

confidence: 99%

Shear friction capacity of self-consolidating concrete

Savaris

Pinto

2021

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

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.

show abstract

Behaviour of concrete under shear and normal stresses

Cited by 7 publications

References 2 publications

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

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

A displacement based approach for the analysis, development, and design of reinforced concrete

Shear friction capacity of self-consolidating concrete

Contact Info

Product

Resources

About