Determination of Tension Softening Diagrams of Concrete by Means of Bending Tests

Uchida, Yoshiyuki; Rokugo, Keitetsu; Koyanagi, Wataru

doi:10.2208/jscej.1991.426_203

Cited by 28 publications

(15 citation statements)

References 1 publication

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“…As a result, tensile stress at the crack plane does not completely drop to zero and concrete shows softened tension after cracking. Uchida's model [18] expressing a relationship between crack width and bridging stress is adopted in this work (Fig. 11).…”

Section: Tensile Stress Transfermentioning

confidence: 99%

Localized nonlinearity and size-dependent mechanics of in-plane RC element in shear

Soltani¹,

An²,

Maekawa³

2005

Engineering Structures

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Section: Tensile Stress Transfermentioning

confidence: 99%

Localized nonlinearity and size-dependent mechanics of in-plane RC element in shear

Soltani¹,

An²,

Maekawa³

2005

Engineering Structures

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“…The tension-softening curves were obtained with the modified J-integral method (Uchida 1991) based on the relationship between load and crack width measured in the tension-softening test. The tension-softening curves of concrete beams with fiber content of 0 and 0.5 vol% are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Analytical Study on Shear Capacity Evaluation of RC Beams with PVA Short Fiber

Ito

Iwanami

Yokota

et al. 2014

ACT

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This paper reports experimental and analytical results of shear capacity evaluation of concrete beams reinforced by PVA short fibers. Loading tests were carried out on various reinforced concrete beams with PVA short fibers of varying types and content, shear reinforcement ratios, effective depths, and shear span-to-effective depth ratios, a/d. The analysis was carried out using the tension-softening model obtained from the material test to simulate the beam shear tests. As a result of the investigation, it was confirmed that shear capacity is improved by mixing PVA short fibers in concrete and that the increase in shear capacity is governed by fiber content and beam effective depth. Further, effective fiber behavior was confirmed in beams showing the tied-arch resisting mechanism. As a result of analysis, it was confirmed that the effect of the tension-softening model for diagonal cracks was large in beams with a small a/d, and that the effect of the shear transfer model was large in beams with a large a/d. Based on comparison with experimental results, we recommend the combination of constitutive laws in the evaluation and analysis of the shear capacity of FRC beams.

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“…However, there is an inherent problem in this test; it is difficult to maintain a stable condition of loading on the specimen during the softening process. Therefore, by using the energy balance concept that was proposed to determine the post-peak tension-softening relation of concrete [35][36][37][38][39][40][41][42], the softening relation for the cement-treated sand was estimated from the bending test results. Three points bending tests were conducted by using a beam specimen with a central notch shown in Figure 14 [25].…”

Section: Pc-3mentioning

confidence: 99%

“…The P-d c0 relations are stable even after the ELASTO-PLASTIC MODEL FOR CEMENT-TREATED SAND 81 peak loads, thereby indicating the existence of a strain-softening relation of the cement-treated sand similar to concrete. By using the method proposed by Uchida et al [39,40], the softening relations for the cement-treated sand were estimated from the P-d c0 curves. The calculated tension-softening relations are shown in Figure 16.…”

Section: Pc-3mentioning

confidence: 99%

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Elasto‐plastic model for cement‐treated sand

Namikawa

Mihira²

2006

Num Anal Meth Geomechanics

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SUMMARYThis paper presents an elasto-plastic model for non-linear analyses of cement-treated sand. Various laboratory tests were systematically carried out to investigate the pre-peak and post-peak behaviours of a cement-treated sand. On the basis of these experimental results, the new model was built within the framework of a relatively simple elasto-plastic theory.Two failure criteria are employed to express tensile and shear failure characteristics observed in the experimental results of the cement-treated sand. The proposed model can describe strain-hardening and strain-softening responses under both failure modes. In the strain-softening rules, the smeared crack concept is used, and a characteristic length is considered to avoid the issue of mesh-size dependency. Since the failure criterion and strain-hardening/softening rules are based on the experimental evidences, the model is relatively easy to understand and the parameters used in the model have clear physical meaning. The proposed model was applied to simulate the behaviour of cement-treated sand in various laboratory tests, allowing for a reasonable comprehensive evaluation. It was demonstrated that the proposed model is suitable for describing both the tensile and shear failure behaviours of cement-treated sand.

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Determination of Tension Softening Diagrams of Concrete by Means of Bending Tests

Cited by 28 publications

References 1 publication

Localized nonlinearity and size-dependent mechanics of in-plane RC element in shear

Localized nonlinearity and size-dependent mechanics of in-plane RC element in shear

Analytical Study on Shear Capacity Evaluation of RC Beams with PVA Short Fiber

Elasto‐plastic model for cement‐treated sand

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