Influence of aggregate interlock on the shear resistance of reinforced concrete beams without stirrups

Huber, Tobias; Huber, Patrick; Kollegger, Johann

doi:10.1016/j.engstruct.2019.01.074

Cited by 41 publications

(20 citation statements)

References 14 publications

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“…On the other hand, for HSC beams whose strength is within the range of 40 to 110 MPa, Sarkar et al [6] suggested the following contribution: the compression zone Vcy = 13 to 17%, the aggregate interlocking Vay = 34 to 40% and the dowel action effect Vd = 43 to 53%. In HSC, it has been reported that the aggregate interlocking contribution to the shear strength (Vay) is considerably reduced [2,4,8,9], compared to that in NSC. This is thought to be due to the nature of diagonal cracking, straight and trans-granular with smooth crack faces as compared to the one in NSC which is rather inter-granular with rough crack faces [4,5,10,11].…”

Section: Introductionmentioning

confidence: 99%

Experimental and nonlinear finite element analysis of shear behaviour of reinforced concrete beams

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Experimental and nonlinear finite element analysis of shear behaviour of reinforced concrete beams

et al. 2021

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“…Yet, as shown by Cavagnis et al by analyzing the results for several inner crack profiles (measured once the two bodies separated by the critical shear crack were detached after testing), these differences are reasonably moderate. In addition, other groups of researchers have performed independent analyses of the contribution of the shear‐transfer actions following a similar methodology yielding similarly consistent results.…”

Section: Recent Experimental Findings and Corroborations On The Shearmentioning

confidence: 83%

“…Although developed decades ago, the introduction of DIC technique to get detailed measurements on tests has become recently used in an intensive manner . With this technique, measurement errors comparable to those of traditional measurement approaches can be obtained, but with the potential to get continuous reading during the test (without the need to perform measurement stages) and with results recorded at high frequencies (higher than 1 Hz) .…”

Section: Recent Experimental Findings and Corroborations On The Shearmentioning

confidence: 99%

From experimental evidence to mechanical modeling and design expressions: The Critical Shear Crack Theory for shear design

Muttoni

Ruiz

2019

Structural Concrete

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Many research efforts have so far been devoted to the topic of shear design of members without transverse reinforcement since the first development in structural concrete. This has allowed a number of significant advances in the understanding of the phenomenon, which is currently acknowledged to depend upon a number of sheartransfer actions in cracked concrete such as aggregate interlocking related to crack opening and sliding, the residual tensile strength of concrete after cracking, dowelling of the reinforcement and the inclination of the compression chord. In the last years, independent teams of researchers have confirmed this by means of detailed measurements on tests performed with Digital Image Correlation and by integrating constitutive laws governing the transfer of shear. In agreement to the observed physical reality, clear and scientifically based theories have been developed allowing researchers to reproduce the shear response in a realistic manner and to perform more accurate predictions on the strength of members. One of these theories, grounded on experimental facts and supported by mechanical modeling, is the Critical Shear Crack Theory (CSCT). In this paper, the fundamentals of the theory are reviewed, linking them to the experimental response of beams in shear. Based upon these fundamentals, a general physical-mechanical model is presented to implement the CSCT basic ideas. On the basis of these results, the aptness of defining a criterion to assess failures in shear is justified, which can be formulated in a simplified manner and is suitable for design. The aim of this criterion is to lead to consistent design expressions, sufficiently simple to be used in practice. It is particularly interesting that the mechanical basis of the model allows natural reproduction of physical phenomena, such as size and reinforcement strain effects, that can be assessed in an accurate manner considering the nonlinear response of a potentially cracked

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“…The empirical model for estimating dowel action was proposed in [4]. Several models for describing the effect of aggregate interlock were developed, among them well known model derived by Walraven [25] and new propositions presented recently in [26,27]. However, the activation of the individual shear transfer mechanism seems to be depended on the width of the inclined crack.…”

Section: Shear Transfer Actionsmentioning

confidence: 99%

Analysis of fracture processes in reinforced concrete beams without stirrups

Słowik

2021

Frattura Ed Integrità Strutturale

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The analysis of fracture processes which led to shear failure in reinforced concrete beams without transverse reinforcement was performed on the basis of test results from the author’s own experimental investigation and numerical simulations. The variable parameters during the experiment were a beam’s length and a shear span. It was observed that the character of failure in the beams depended on the beam’s length and the span-to-depth ratio. In slender beams characterized by the shear span-to-depth ratio 3.4 and 4.1, the formation of the critical diagonal crack caused a brittle, sudden failure and the shear capacity was low. In short beams, when the shear span-to-depth ratio was 1.8 and 2.3, the failure process had a more stable character with a slow developing of inclined cracks and the significantly higher load capacity was reached. The activation of various shear transfer mechanisms was examined with regard to the slenderness of the member and the transition between a beam action which took place in slender beams to an arch action which predominated in short beams was described.

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Influence of aggregate interlock on the shear resistance of reinforced concrete beams without stirrups

Cited by 41 publications

References 14 publications

Experimental and nonlinear finite element analysis of shear behaviour of reinforced concrete beams

Experimental and nonlinear finite element analysis of shear behaviour of reinforced concrete beams

From experimental evidence to mechanical modeling and design expressions: The Critical Shear Crack Theory for shear design

Analysis of fracture processes in reinforced concrete beams without stirrups

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