Evaluation of post-cracking behavior of fiber reinforced concrete using indirect tension test

Borges, Leonardo Augusto Cruz; Monte, Renata; Rambo, Dimas Alan Strauss; Figueiredo, Antônio Domingues de

doi:10.1016/j.conbuildmat.2019.01.158

Cited by 23 publications

(20 citation statements)

References 19 publications

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“…The energy absorption capacity of concrete is defined as the area between the stress–strain curve and the transverse coordinate axis. Borges 14 and Hassan 15 pointed out that the energy absorption capacity of concrete increases with the increase of the strain rate. It is clear from Figures 9–11 that, with the increase of the strain rate, the peak stress of concrete increased, while the peak strain underwent no significant change.…”

Section: Analysis Of the Rate Effectmentioning

confidence: 99%

“…Segura‐Castillo 26 and Goaiz 3 investigated the dynamic tensile constitutive relationship of fiber‐reinforced concrete. Pujadas 27 and Borges 14 focused on the instability and discreteness of the dynamic performance of fiber‐reinforced concrete in the descending stage via experiments.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the rate‐dependent tensile properties of ultra‐high‐performance concrete have been investigated 33,34 . Moreover, the softening performance, energy absorption capacity, and residual bearing capacity of concrete can be determined from the descending segments of concrete tensile curves 14 …”

Section: Introductionmentioning

confidence: 99%

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Rate effect on the stress–strain behavior of concrete under uniaxial tensile stress

Gao

Zhou

Ren

et al. 2020

Structural Concrete

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Concrete is a typical rate‐dependent material, and a direct tensile test is the most effective method by which to investigate its tensile performance. In this study, an additional loading device for direct uniaxial tensile tests was designed and fabricated to achieve central loading and determine the descending stage during direct tensile tests. Experimental results prove that the device is reliable and convenient for reuse; it is characterized by its ability to obtain complete stress–strain curves and to be used for many repetitive tests. Initially, 27 prismatic specimens were used to test the compressive strengths and elastic moduli of concrete specimens with designed compressive strengths of 25, 30, and 50 MPa. Next, a total of 256 uniaxial direct tensile tests were carried out, including 101 static tests at a loading strain rate of 10−5 s−1 and 155 dynamic tests at loading strain rates of 10−4 s−1 and 10−2 s−1. A total of 121 complete stress–strain curves were acquired for the 256 direct tensile tests. According to the test results, the SDs of the entire curves of the tensile stress of concrete are presented, and the energy absorption capacities of the specimens were also determined. The effects of the loading rate on the mean and variability of the peak stress, peak secant modulus, elastic modulus, and peak strain were analyzed. With the increase of the strain rate, the other indexes, excluding the peak strain, were found to notably increase.

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Section: Analysis Of the Rate Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rate effect on the stress–strain behavior of concrete under uniaxial tensile stress

Gao

Zhou

Ren

et al. 2020

Structural Concrete

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“…The DEWS test was conducted using an open-loop universal testing machine, EMIC DL 10000. Cubical specimens were evaluated regarding the tensile strength and post-crack tensile strength following the simplified procedure presented by [4] and is summarized here for the convenience of the reader. The crack opening displacement (COD) was measured by two transducers positioned in opposite sides and middle height of the cubical specimens.…”

Section: Double Edge Wedge Splitting Testmentioning

confidence: 99%

“…However, there is a risk associated with this simplicity when analyzing SLS values due to the post-peak instability when evaluated SFRC with low fiber content. Additionally, this test method is capable of characterizing both softening and hardening behaviors, as well as variations associated with the orthotropy of the composite [4]. This test, however, has never before been applied to SFRC after high temperature exposure, which is the main objective of this preliminary study.…”

Section: Introductionmentioning

confidence: 99%

The effect of elevated temperatures on the tensile properties of steel fiber reinforced concrete by means of double edge wedge splitting (DEWS) test: Preliminary results

Serafini¹

2019

Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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The definition of the post-fire properties of steel fiber reinforced concrete (SFRC) is a current technological challenge. A study conducted using the Barcelona test (BCN) show that the puncture caused by the test may result in crushing of the porous matrix and induced frictional interaction. This influence may result in misleading conclusions regarding the properties and the behavior of the composite, which denotes that an inadequate test methodology may significantly affect results of SFRC after temperature exposure. In this context, the Double Edge Wedge Splitting (DEWS) test is a promising methodology for this type of application since a mode I fracture type is induced in the specimen, diminishing any compressive or puncture interactions with the porous matrix. Therefore, this work aims to present the results obtained for SFRC exposed to temperatures of 25 °C and 600 °C by means of DEWS test. Results show that the tensile strength of the cement matrix and the residual tensile strength at the service limit state and ultimate limit state are significantly affected. Additionally, no visible damage was caused by the interaction between the roller and the SFRC for specimens exposed to 600 °C. The present study contributes to the absent literature on the residual tensile strength of SFRC after temperature exposure, and suggests an alternative test method to be employed.

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Experimental Study on Shear Transfer Performance of Uncracked Monolithic Steel Fiber Concrete

et al. 2022

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Evaluation of post-cracking behavior of fiber reinforced concrete using indirect tension test

Cited by 23 publications

References 19 publications

Rate effect on the stress–strain behavior of concrete under uniaxial tensile stress

Rate effect on the stress–strain behavior of concrete under uniaxial tensile stress

The effect of elevated temperatures on the tensile properties of steel fiber reinforced concrete by means of double edge wedge splitting (DEWS) test: Preliminary results

Experimental Study on Shear Transfer Performance of Uncracked Monolithic Steel Fiber Concrete

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