Evaluation of three-dimensional effects in short deep beams using a rigid-body-spring-model

Gedik, Yasar Hanifi; Nakamura, Hikaru; Yamamoto, Yoshihito; Kunieda, Minoru

doi:10.1016/j.cemconcomp.2011.06.004

Cited by 59 publications

(27 citation statements)

References 13 publications

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“…Furthermore, it is applicable to the simulation of uniaxial tension, uniaxial compression, localized compressive failure as well as 3-D effects, the triaxial stress state, dilatancy and confinement effect, which have been investigated in several studies (Yamamoto 2010, Gedik et al 2010. 3-D RBSM can simulate multiaxial behavior as well as the confinement effect provided by stirrups (Gedik 2011). Moreover, the applicability of 3-D RBSM to deep beams is confirmed in this section by comparing the experimental and analytical results in terms of the load-displacement curves, crack patterns and strain of the stirrups.…”

Section: Experimental and Analytical Resultssupporting

confidence: 48%

“…The simulation capability of confinement by reinforcement is given by Gedik et al (2011) and Yamamoto (2010) Table 2. The comparison of the stress-strain relationship for the specimen between the analysis and experimental results is given in Fig.…”

Section: Reinforcement Modelmentioning

confidence: 99%

“…It can also be used to investigate stress transfer mechanisms at the meso-level. Furthermore, 3-D behavior as well as the effects of confinement of concrete can be simulated by 3-D RBSM (Yamamoto 2010;Gedik et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Stirrups on the Shear Failure Mechanism of Deep Beams

Gedik

Nakamura

Yamamoto

et al. 2012

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The purpose of this study is to clarify the effect of stirrups in deep beams by investigating the shear failure mechanism analytically by using the 3-D Rigid-Body-Spring Model analytical tool. The investigation of the analytical results of the internal stress state and 3-D deformations of deep beams were the key objectives of this study. Firstly, the applicability of the analytical tool on deep beams was confirmed by comparison of analytical and experimental results. Then, the stirrup contribution to load carrying capacity of deep beams was investigated and the shear failure mechanism based on the B and D region concept was clarified analytically. To achieve this, analytical results such as stress distribution, 3-D deformations, crack patterns and strain of stirrups were investigated. Three types of stirrup effect were observed in deep beams. In the a/d= 0.5 case, the peak load increase due to the confinement effect of stirrups. In the a/d=1.0 case, the stirrup contributes to the strut action that leads to an increase in load. In the case of a/d < 1.0, the D region is dominant. On the other hand, the peak load increases significantly with increases of stirrup ratio in the case of a/d > 1.5, in which the truss analogy is dominant rather than the strut action.

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Section: Experimental and Analytical Resultssupporting

confidence: 48%

Section: Reinforcement Modelmentioning

confidence: 99%

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Effect of Stirrups on the Shear Failure Mechanism of Deep Beams

Gedik

Nakamura

Yamamoto

et al. 2012

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“…Above all, the numerical method is outlined. 3-D RBSM is a discrete method and has been proved to be effective to accurately simulate the behaviors of reinforced concrete structures including bending and shear (Yamamoto et al 2008;Gedik et al 2011;Yamamoto et al 2014;Fu et al 2016a). In 3-D RBSM, concrete is modeled as an assemblage of rigid polyhedrons interconnected by springs at their boundary surfaces (see Fig.…”

Section: Numerical Methods and Modelmentioning

confidence: 99%

Investigation of Influence of Section Pre-crack on Shear Strength and Shear Resistance Mechanism of RC Beams by Experiment and 3-D RBSM Analysis

Nakamura

Yamamoto

et al. 2017

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In order to investigate the influence of crack through section, which is often generated under cyclic loading, on the shear behavior and strength of RC beam, an experimental method was attempted to introduce a 0.5 mm and 1.0 mm-wide pre-crack, respectively, in beam cross section. The two pre-cracked beams were tested and the shear behaviors were compared with a non-cracked one. As the experimental result, it was found that the section pre-cracks led to a significant degradation of shear strength. Secondly, the different shear behaviors between pre-cracked and non-cracked beams were simulated by 3-D RBSM, and the developments of shear resistances were decomposed into the shear contributions provided by beam action and arch action. Based on the decomposition result, it became clear that the arch actions governed the grades of shear strengths and the section pre-cracks played a primary role in inducing extra crack behaviors and obstructing the longitudinal compressive stress transfer in concrete.

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“…Bolander and Saito 2) Gedik et al 3) Nagai et al 4) Azevedo et al 5) Grassl et al 6), 7) Leite et al -1 (a)…”

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Simulation of Compressive Failure in Concrete by Focusing on Heterogeneity due to Coarse Aggregates

Kurumatani¹,

Kamino²,

Terada³

2013

J. JSCE

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To examine the geometrical effects of aggregates on fracture behavior in concrete, numerical experiments on compressive failure in concrete's meso-structures are carried out in this paper. The method for numerical experiment employed in this paper is capable of simulating compressive failure in quasi-brittle materials involving micro-or meso-scale contact on crack interfaces. First, we explain the modeling of quasi-brittle fracture and the method for numerical experiment. The discrete micro-crack behavior is introduced to a finite element framework in consideration of material inhomogeneity of cement-based materials and by using penalty springs. Then, the basic performance for simulating fracture behavior involving tensile or shear cracks is verified. Finally, the numerical experiments are performed to investigate the effect of heterogeneity due to aggregates in concrete in comparison with the fracture behavior of crushed stone and river stone.

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Evaluation of three-dimensional effects in short deep beams using a rigid-body-spring-model

Cited by 59 publications

References 13 publications

Effect of Stirrups on the Shear Failure Mechanism of Deep Beams

Effect of Stirrups on the Shear Failure Mechanism of Deep Beams

Investigation of Influence of Section Pre-crack on Shear Strength and Shear Resistance Mechanism of RC Beams by Experiment and 3-D RBSM Analysis

Simulation of Compressive Failure in Concrete by Focusing on Heterogeneity due to Coarse Aggregates

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