Influence of Fiber Orientation on Bridging Performance of Polyvinyl Alcohol Fiber-Reinforced Cementitious Composite

Kanakubo, Toshiyuki; Miyaguchi, Masaru; Asano, Kohei

doi:10.14359/51688633

Cited by 18 publications

(38 citation statements)

References 13 publications

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“…The authors have proposed the bridging law, which is expressed by tensile stress-crack width relationship, considering the influence of fiber orientation [3]. The bridging law is calculated by the summation of the pullout properties of each single fiber in crack surface.…”

Section: Calculation Methods Of Bridging Lawmentioning

confidence: 99%

“…In order to give the orientation angle to each single fiber at crack surface in the calculation of the bridging law, a PDF (probability density function) has been proposed by Kanakubo et al [3]. The PDF expresses the fiber orientation distribution using elliptic distribution.…”

Section: Calculation Methods Of Bridging Lawmentioning

confidence: 99%

“…[2]). Casting and pouring direction of FRCC affects the fiber orientation, and vertical pouring in tension test specimens causes degradation of tensile strength and deformation capacity of FRCC. The authors have studied the influence of fiber orientation to tensile characteristics of FRCC using PVA (polyvinyl alcohol) fiber through visualization simulation using water glass solution and calculation of the bridging law, which is expressed by tensile stress-crack width relationship [3]. To evaluate the fiber orientation distribution quantitatively, an approximation methodology using an elliptic function (elliptic distribution) was introduced in that study.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling of Bridging Law for PVA Fiber-Reinforced Cementitious Composite Considering Fiber Orientation

Ozu¹,

Miyaguchi²,

Kanakubo³

2018

JCEA

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The authors have proposed the calculation method of bridging law, that is expressed by tensile stress-crack width relationship, considering the influence of fiber orientation in FRCC (fiber-reinforced cementitious composite). The objective of this study is to propose a new tri-linear model that expresses the bridging law considering fiber orientation. The parameters that give the characteristic points of the tri-linear model are proposed as functions of orientation intensity. The bending test, in which the specimens are fabricated by three different casting methods, is conducted to verify the adaptability of the proposed model. The results of section analysis using the proposed model can present the difference of bending strength due to the fiber orientation.

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Section: Calculation Methods Of Bridging Lawmentioning

confidence: 99%

Section: Calculation Methods Of Bridging Lawmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of Bridging Law for PVA Fiber-Reinforced Cementitious Composite Considering Fiber Orientation

Ozu¹,

Miyaguchi²,

Kanakubo³

2018

JCEA

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“…The target compressive strength of the FRCCs was set to 50 MPa. As listed in Table 1, water-cement ratio of 0.56 was adopted, which is based on the previous study [17], fiber volume fraction for each specimen was 1%. The mechanical properties of each polymer fiber are shown in Table 2 and Fig.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…Comparing to the conventional concrete, FRCC has a remarkable deformability especially under tensile and bending load with a large energy absorption capacity due to the fiber bridging effect. After first cracking, fiber can transfer tensile force through crack which strongly affects the tensile performance of FRCC [17]. This remarkable bridging capacity makes it an appropriate choice for application in beam-column joint of RC structures to resist inelastic deformation.…”

mentioning

confidence: 99%

Shear Performance of FRCC Beam-Column Joints Using Various Polymer Fibers

Mu¹,

Yasojima²,

Kanakubo³

2019

JCEA

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Brittle shear failure should be avoided in beam-column joint of a reinforced concrete (RC) frame during the earthquake. Fiber-reinforced cementitious composite (FRCC) which presents a remarkable deformability especially under tensile and bending load with a large energy absorption capacity is expected to be used in the crucial part of a RC frame. With the development of polymer material, various synthetic fibers have become the best selection to improve concrete capacity and failure resistance without the corrosion of fibers. The objective of this study is to investigate the influence of fiber bridging effect on the shear capacity of FRCC beam-column joint. The main parameter of the test in the present study is the fiber types: aramid, polypropylene (PP) and polyvinyl alcohol (PVA) fiber. To evaluate shear capacity quantitatively, a new calculation method using FRCC tensile characteristics confirmed by the uniaxial tension test is newly proposed. The difference of below 7% between calculated value and experimental value demonstrates that the calculation method is feasible.

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Evaluation of Shear and Tensile Bridging Characteristics of PVA Fibers Based on Bridging Law

Ozu

Yamada²,

Yasojima

et al. 2017

Strain-Hardening Cement-Based Composites

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Strain-Hardening Cementitious Composites (SHCC), in which short fibers are mixed in mortar, show improved tensile performance and ductility of the cementitious material because fibers bridging the crack transfer tensile forces after first cracking. It is considered that the stress field at the shear crack surface in the structural element under the shear force is a biaxial stress field in which tensile and shear stresses exist concurrently. In fiber-reinforced cementitious composites, both tensile and shear stresses are transmitted via fibers that bridge shear cracks. It is necessary that the effect of fibers bridging a shear crack under tensile and shear stresses is investigated. In this study, uniaxial tension tests were carried out for specimens which have a square cross-section and an inclined notch. The biaxial stress field can be expressed by the inclined crack surface produced by the tensile loading. From the test results, it was confirmed that the tensile stress decreased with increasing notch angle in the tension tests. A calculation method for the bridging law with an inclined crack was introduced and the calculation results were compared with the test results. Though the maximum tensile stress in the tests was smaller than that in the calculation results, the curves after the maximum stress show good agreements with the calculations. The maximum stress reached in the tests tends to decrease with increasing crack angle (notch angle) as in the calculation results.

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Influence of Fiber Orientation on Bridging Performance of Polyvinyl Alcohol Fiber-Reinforced Cementitious Composite

Cited by 18 publications

References 13 publications

Modeling of Bridging Law for PVA Fiber-Reinforced Cementitious Composite Considering Fiber Orientation

Modeling of Bridging Law for PVA Fiber-Reinforced Cementitious Composite Considering Fiber Orientation

Shear Performance of FRCC Beam-Column Joints Using Various Polymer Fibers

Evaluation of Shear and Tensile Bridging Characteristics of PVA Fibers Based on Bridging Law

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