Compressive Fracture Behavior and Mechanical Properties of Rc Columns With Normal- And High-Strength Materials Under Concentric Compression

Akiyama, Mitsuyoshi; Watanabe, Masatoshi; Abe, Satoshi; Tao, Cui Song; Maeda, Naomi; Suzuki, Motoyuki

doi:10.2208/jsceje.62.477

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…In such a context, Akiyama et al 32 and Suzuki et al 33 conducted several tests on plain and laterally‐confined concrete specimens, proposing a formula for the determination of G c . In the case of plain concrete, they suggested the following expression:

G_{c} = 80 - 50 k_{b}

with k b = 40/ σ c <1.…”

Section: The Cohesive/overlapping Crack Modelmentioning

confidence: 99%

“…The area subtended by the σ-w c curve (Figure 3(b)) may be interpreted, in close analogy to Figure 2(b), as the crushing energy, G c , i.e., a compressive fracture energy. 31 In such a context, Akiyama et al 32 and Suzuki et al 33 conducted several tests on plain and laterally-confined concrete specimens, proposing a formula for the determination of G c . In the case of plain concrete, they suggested the following expression:…”

Section: The Cohesive/ Overlapping Crack Modelmentioning

confidence: 99%

See 1 more Smart Citation

Scale‐dependent maximum reinforcement percentage in reinforced concrete beams

Carpinteri

Accornero

Cafarelli

2021

Structural Concrete

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The Cohesive/Overlapping Crack Model is able to describe the transition between cracking and crushing failures occurring in reinforced concrete beams by increasing beam depth and/or steel percentage. Within this Nonlinear Fracture Mechanics model, the tensile and compressive ultimate behaviors of the concrete matrix are modeled through two different process zones that advance independently one of another. Moreover, this model is able to investigate local mechanical instabilities occurring in the structural behavior of reinforced concrete structures: tensile snap-back and snap-through, which are due to concrete cracking or steel fracture, and the compressive snap-back occurring at the end of the plastic plateau, which is generated by the unstable growth of the crushing zone. In this context, the application of the Cohesive/Overlapping Crack Model highlights that the ductility, which is represented by the plastic rotation capacity of a reinforced concrete element subjected to bending, decreases as reinforcement percentage and/or beam depth increase. Thus, a scale-dependent maximum reinforcement percentage beyond which concrete crushing occurs prior to steel yielding is demonstrated to exist. In particular, the maximum steel percentage results to be inversely proportional to h 0.25 , h being the beam depth. In this way, a rational and quantitative definition of over-reinforcement is provided as a steel percentage depending on the beam depth.

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G_{c} = 80 - 50 k_{b}

with k b = 40/ σ c <1.…”

Section: The Cohesive/overlapping Crack Modelmentioning

confidence: 99%

Section: The Cohesive/ Overlapping Crack Modelmentioning

confidence: 99%

Scale‐dependent maximum reinforcement percentage in reinforced concrete beams

Carpinteri

Accornero

Cafarelli

2021

Structural Concrete

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“…The stirrup strength corresponding to the peak stress of confined concrete does not necessarily reach the yield strength, especially when Assumed for cover concrete using high-strength concrete confined with stirrups. To this end, Akiyama et al [10] proposed stirrups at peak stress f s,c :…”

Section: Reinforced Concrete Columnsmentioning

confidence: 99%

“…Thus, ultimate compressive strain of confined core concrete, ε cu can be determined by equations (4), (5), (7), (8), (9), (10), (11), (12). After ε cu is determined, according to a strain-compatible moment-curvature analysis, the plastic curvature capacity of the column section is defined as (Ø f -Ø y ).…”

Section: Reinforced Concrete Columnsmentioning

confidence: 99%

Local Damage Indices of Frames Consisting of Composite Beams and RC Columns

Li¹,

Sun²,

Yang³

et al. 2016

TOCIEJ

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Abstract:The study is to propose the local damage indices of composite frame structures consisting of high-strength concrete columns confined by continuous compound spiral ties and steel beams (CCSTRCS), the local damage indices would lay a foundation for the study of the overall damage indices for composite CCSTRCS frame. The Mehanny damage model has been modified to predict the local damage behavior of composite CCSTRCS frames, it enlarges the scope of application for the composite structures compared with the previous work. The proposed model is validated by comparing with the present references. The study results suggest the different components corresponding to the extent of the damage and its damage index.

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