Experimental and numerical study on tensile strength and failure pattern of high performance steel fiber reinforced concrete under dynamic splitting tension

Li, Xiaojing; Zhang, Yaoyao; Shi, Chong; Chen, Xudong

doi:10.1016/j.conbuildmat.2020.119796

Cited by 52 publications

(32 citation statements)

References 58 publications

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“…The main reason was that the water evaporated rapidly in the process of hydration reaction, resulting in many micro-cracks and pores in the matrix. When the specimen was subjected to static loading, stress concentration occurred in the crack tip, and micro-cracks expanded from the center to both ends gradually, eventually forming a straight crack leading to brittle failure of the specimen [ 14 ]. With the expansion of the main crack, some secondary micro-cracks and triangular fracture zones were generated on both ends of CFRC0.1 and CFRC0.2, and the micro-cracks at one end of CFRC0.3 increased.…”

Section: Test Results and Analysismentioning

confidence: 99%

“…With the increase of stress rate, the time interval between new cracks and carbon fiber fracture or pull-out became shorter or occurred simultaneously. The energy consumption of specimens in finite time mainly depended on the generation of new cracks [ 14 ]. However, the initial crack strength of CFRC increased due to the rate effect of the material, the tensile strength was improved slightly by the subsequent generation of new cracks and fiber pull-out or fracture, with the result that the strengthening effect of CFRC was not obvious at high stress rate.…”

Section: Test Results and Analysismentioning

confidence: 99%

“…When the volume content of carbon fiber was between 0 and 0.2%, DIF values of different carbon fiber contents were greatly different, and it decreased significantly with the increase of carbon fiber content. It is mainly because the concrete with high static strength usually shows a low DIF value [ 14 ], while CFRC has higher static strength, so it has a lower DIF value. However, it is worth noting that DIF values of CFRC0.3 were slightly higher than those of CFRC0.2.…”

Section: Test Results and Analysismentioning

confidence: 99%

“…Because it is difficult to make the axis of the tensile load coincide with the axis of the specimen in the direct tensile test, the experimental data of the direct tensile test are often inaccurate. Then, the Brazilian splitting test was proposed as an alternative tensile test method to make up for the defects of the direct tensile test [ 14 ]. Since the strain rate of the static splitting tensile test was relatively low, a rock mechanics testing machine was used for testing, as shown in Figure 3 .…”

Section: Experimental Procedures and Methodsmentioning

confidence: 99%

“…The steel fibers and polymer fibers are easily obtained and incorporated into the concrete matrix, which can effectively inhibit the initiation and expansion of cracks during the destruction of concrete structures, and improve durability and tensile strength, so they have become widely used fibers [ 7 , 8 , 9 , 10 ]. Therefore, many researchers have focused on steel fiber and polymer fiber reinforced concrete and conducted a lot of research on its static and dynamic mechanical properties [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. However, compared with other fibers, carbon fiber has many potential advantages, including a series of excellent properties such as high strength, high modulus, high-temperature resistance, corrosion resistance, light weight, electrical conductivity, etc.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Dynamic Splitting Characteristics of Carbon Fiber Reinforced Concrete

Chen¹,

Yang²

2020

Materials

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Due to the non-uniform tension and compression strength of concrete, carbon fiber can be added to concrete to improve its static tensile behavior and increase the tension–compression ratio. In view of the destructive consequences of impacts and explosions, it is necessary to study the dynamic responses of carbon fiber reinforced concrete (CFRC) structures. Therefore, the effects of the stress rates and carbon fiber contents on the dynamic tension behavior of CFRC were investigated in this paper. The dynamic splitting tests of concrete with the fiber contents of 0, 0.1, 0.2, and 0.3% were carried out by using a split Hopkinson pressure bar (SHPB) device with a diameter of 74 mm. We found that with the increase of fiber content, the static tensile strength of CFRC increases obviously, but the increased amplitude tends to decrease. The dynamic tensile strength and dynamic increase factor (DIF) both increase with the increase of stress rate, but the growth rate slows down, showing an obvious rate effect. The rate sensitivity of ordinary concrete is higher than CFRC. There are significant differences in the influence of carbon fiber on the dynamic and static strength of concrete. In the design of concrete mixing proportion, the content of carbon fiber should be appropriately selected to meet the requirements of dynamic and static mechanical properties.

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Section: Test Results and Analysismentioning

confidence: 99%

Section: Test Results and Analysismentioning

confidence: 99%

Section: Test Results and Analysismentioning

confidence: 99%

Section: Experimental Procedures and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental Study on Dynamic Splitting Characteristics of Carbon Fiber Reinforced Concrete

Chen¹,

Yang²

2020

Materials

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Analysis and prediction of the compressive and splitting tensile performances for the novel multiple hooked‐end steel fiber reinforced concrete

Guo

Pang

Chen

et al. 2023

Structural Concrete

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In recent years, the application of the novel multiple hooked-end steel fiber has gradually become a hot spot in the engineering due to its several excellent properties. In this study, the splitting tensile and compressive properties of the SFRC with 3D single hooked-end and 4D/5D multiple hooked-end steel fibers were studied. The variables of the experimental investigation included the concrete matrix strength, steel fiber content, and aspect ratio. The results showed that the compressive strength of steel fiber reinforced concrete (SFRC) increased first and then decreased with the increasing steel fiber content. The concrete matrix, aspect ratio, and end hook number of steel fiber had the significant effect on the optimal steel fiber content. In addition, increasing the content of steel fiber was the most effective way to improve the splitting tensile strength of SFRC, and the splitting tensile strength increased with the increase of the aspect ratio and end hook number of steel fiber. Finally, the splitting tensile strength prediction model of SFRC with novel multiple hooked-end steel fiber was proposed by introducing the steel fiber number in the SFRC section, and the accuracy of the model was verified by comparison with experimental data.

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Comparative study on effects of steel fiber and imitation steel fiber on dynamic tensile properties of ultra-high-performance cementitious composites

Liu,

Guo,

Yang

et al. 2024

J Mater Sci

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Experimental and numerical study on tensile strength and failure pattern of high performance steel fiber reinforced concrete under dynamic splitting tension

Cited by 52 publications

References 58 publications

Experimental Study on Dynamic Splitting Characteristics of Carbon Fiber Reinforced Concrete

Experimental Study on Dynamic Splitting Characteristics of Carbon Fiber Reinforced Concrete

Analysis and prediction of the compressive and splitting tensile performances for the novel multiple hooked‐end steel fiber reinforced concrete

Comparative study on effects of steel fiber and imitation steel fiber on dynamic tensile properties of ultra-high-performance cementitious composites

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