Research on the Fracture Behavior of Steel-Fiber-Reinforced High-Strength Concrete
The behavior of steel fiber concrete, which is the most widely used building material, has been widely examined. However, methods for calculating Fracture parameters differ by fracture behavior of SFHSC with different strengths. In this study, the fracture behavior of steel-fiber-reinforced high-str...
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MDPI AG
2021-12-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/1/135 |
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| author | Shanming Qin Danying Gao Zhanqiao Wang Haitang Zhu |
| author_facet | Shanming Qin Danying Gao Zhanqiao Wang Haitang Zhu |
| author_sort | Shanming Qin |
| collection | DOAJ |
| description | The behavior of steel fiber concrete, which is the most widely used building material, has been widely examined. However, methods for calculating Fracture parameters differ by fracture behavior of SFHSC with different strengths. In this study, the fracture behavior of steel-fiber-reinforced high-strength concrete (SFHSC) was -investigated using three-point bending tests. A total of 144 notched concrete beams with a size of 100 mm × 100 mm × 515 mm were tested for three-point bending in 26 groups. The effects of the steel fiber volume ratio, steel fiber type, and relative notch depth on the fracture toughness (K<sub>IC</sub>) and fracture energy (G<sub>F</sub>) of SFHSC specimens were studied. The results show that an increase in the volume fraction of steel fiber (<i>ρ<sub>f</sub></i>) added to high-strength concrete (HSC) significantly improves the fracture behavior of HSC. As compared to milled and sheared corrugated steel fibers, cut bow steel fibers significantly improve the fracture behavior of SFHSC. The effect of incision depth changes on the K<sub>IC</sub> and G<sub>F</sub> of SFHSC and HSC for the comparison group has no common characteristics. With an increase in incision depth, the values of K<sub>IC</sub> of the SFHSC specimens decrease slightly. The G<sub>F0.5</sub>/G<sub>F0.4</sub> of the SFHSC specimens show a decreasing trend with an increase in <i>ρ<sub>f</sub>.</i> According to the test results, we propose calculation models for the fracture behavior of SFHSC with different strengths. Thus, we present a convenient and accurate method to calculate fracture parameters, which lays a foundation for subsequent research. |
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| format | Article |
| id | doaj.art-60ce690d0c4848508dde9996754fef3c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:34:42Z |
| publishDate | 2021-12-01 |
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| spelling | doaj.art-60ce690d0c4848508dde9996754fef3c2023-11-23T11:48:38ZengMDPI AGMaterials1996-19442021-12-0115113510.3390/ma15010135Research on the Fracture Behavior of Steel-Fiber-Reinforced High-Strength ConcreteShanming Qin0Danying Gao1Zhanqiao Wang2Haitang Zhu3School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, ChinaThe behavior of steel fiber concrete, which is the most widely used building material, has been widely examined. However, methods for calculating Fracture parameters differ by fracture behavior of SFHSC with different strengths. In this study, the fracture behavior of steel-fiber-reinforced high-strength concrete (SFHSC) was -investigated using three-point bending tests. A total of 144 notched concrete beams with a size of 100 mm × 100 mm × 515 mm were tested for three-point bending in 26 groups. The effects of the steel fiber volume ratio, steel fiber type, and relative notch depth on the fracture toughness (K<sub>IC</sub>) and fracture energy (G<sub>F</sub>) of SFHSC specimens were studied. The results show that an increase in the volume fraction of steel fiber (<i>ρ<sub>f</sub></i>) added to high-strength concrete (HSC) significantly improves the fracture behavior of HSC. As compared to milled and sheared corrugated steel fibers, cut bow steel fibers significantly improve the fracture behavior of SFHSC. The effect of incision depth changes on the K<sub>IC</sub> and G<sub>F</sub> of SFHSC and HSC for the comparison group has no common characteristics. With an increase in incision depth, the values of K<sub>IC</sub> of the SFHSC specimens decrease slightly. The G<sub>F0.5</sub>/G<sub>F0.4</sub> of the SFHSC specimens show a decreasing trend with an increase in <i>ρ<sub>f</sub>.</i> According to the test results, we propose calculation models for the fracture behavior of SFHSC with different strengths. Thus, we present a convenient and accurate method to calculate fracture parameters, which lays a foundation for subsequent research.https://www.mdpi.com/1996-1944/15/1/135steel fiber reinforced high-strength concretefracture toughnessfracture energythree-point bending test |
| spellingShingle | Shanming Qin Danying Gao Zhanqiao Wang Haitang Zhu Research on the Fracture Behavior of Steel-Fiber-Reinforced High-Strength Concrete Materials steel fiber reinforced high-strength concrete fracture toughness fracture energy three-point bending test |
| title | Research on the Fracture Behavior of Steel-Fiber-Reinforced High-Strength Concrete |
| title_full | Research on the Fracture Behavior of Steel-Fiber-Reinforced High-Strength Concrete |
| title_fullStr | Research on the Fracture Behavior of Steel-Fiber-Reinforced High-Strength Concrete |
| title_full_unstemmed | Research on the Fracture Behavior of Steel-Fiber-Reinforced High-Strength Concrete |
| title_short | Research on the Fracture Behavior of Steel-Fiber-Reinforced High-Strength Concrete |
| title_sort | research on the fracture behavior of steel fiber reinforced high strength concrete |
| topic | steel fiber reinforced high-strength concrete fracture toughness fracture energy three-point bending test |
| url | https://www.mdpi.com/1996-1944/15/1/135 |
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