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Computers and Concrete Volume 13, Number 1, January 2014 , pages 031-47 DOI: https://doi.org/10.12989/cac.2014.13.1.031 |
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Fracture property of steel fiber reinforced concrete at early age |
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Chuan-Qing Fu, Qin-yong Ma and Xian-yu Jin,A. A. Shah and Ye-Tian
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| Abstract | ||
| This research is focused on obtaining the fracture property of steel fiber reinforced concrete(SFRC) specimens at early ages of 1, 2, 3 and 7-day, respectively. For this purpose, three point bending tests of nine groups of SFRC beams with notch of 40mm depth and different steel fiber ratios were conducted. The experimental results of early age specimens were compared with the 28-day hardened SFRC specimens. The test results indicated that the steel fiber ratios and curing age significantly influenced the fracture properties of SFRC. A reasonable addition of steel fiber improved the fracture toughness of SFRC, while the fracture energy of SFRC developed with curing age. Moreover, a quadratic relationship between splitting strength and fracture toughness was established based on the experiment results. Additionally, afinite element (FE) method was used to investigate the fracture properties of SFRC.A comparison between the FE analysis and experiment results was also made. The numerical analysis fitted well with the test results, and further details on the failure behaviors of SFRC could be revealed by the suggested numerical simulation method. | ||
| Key Words | ||
| concrete;steel fiber;SFRC; early-age; fracture energy; fracture toughness; FE method | ||
| Address | ||
| Chuan-Qing Fu: College of Civil Engineering and Architecture, Zhejiang Universityof Technology, 18 Chaowang Road, Hangzhou 310034, China Chuan-Qing Fu and Qin-yong M: Collegeof Civil Engineering and Architecture, Anhui University of Science and Technology, 168 Shungong Road, Huainan 232001, China Xian-yu Jin and Ye-Tian: College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China A. A. Shah: Department of Civil Engineering, Sarhad University of Science and Information Technology, Ring Road, Peshawar 25000, Pakistan | ||