FRACTURE DAMAGE AND SOFTENING CONSTITUTIVE RALATION OF BFRC SUBJECTED TO FREEZE-THAW CYCLES

HUANG Min; DUAN Jingmin; ZHANG Jiaxiang; MAO Qingchao; YUAN Jianghao; SUN Longtang

doi:10.13204/j.gyjzG21010507

Volume 51 Issue 8

Nov. 2021

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HUANG Min, DUAN Jingmin, ZHANG Jiaxiang, MAO Qingchao, YUAN Jianghao, SUN Longtang. FRACTURE DAMAGE AND SOFTENING CONSTITUTIVE RALATION OF BFRC SUBJECTED TO FREEZE-THAW CYCLES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 199-205,178. doi: 10.13204/j.gyjzG21010507

Citation:

HUANG Min, DUAN Jingmin, ZHANG Jiaxiang, MAO Qingchao, YUAN Jianghao, SUN Longtang. FRACTURE DAMAGE AND SOFTENING CONSTITUTIVE RALATION OF BFRC SUBJECTED TO FREEZE-THAW CYCLES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 199-205,178. doi: 10.13204/j.gyjzG21010507

Citation:

HUANG Min, DUAN Jingmin, ZHANG Jiaxiang, MAO Qingchao, YUAN Jianghao, SUN Longtang. FRACTURE DAMAGE AND SOFTENING CONSTITUTIVE RALATION OF BFRC SUBJECTED TO FREEZE-THAW CYCLES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 199-205,178. doi: 10.13204/j.gyjzG21010507

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FRACTURE DAMAGE AND SOFTENING CONSTITUTIVE RALATION OF BFRC SUBJECTED TO FREEZE-THAW CYCLES

doi: 10.13204/j.gyjzG21010507

School of Civil Engineering, Henan University of Engineering, Zhengzhou 451191, China

Received Date: 2021-01-05
Available Online: 2021-11-10
Publish Date: 2021-11-10

Abstract

Abstract

In order to investigate the fracture damage and constitutive softening characteristics of basalt fiber reinforced concrete (BFRC) subjected to freeze-thaw cycles, five groups of specimens with five different basalt fiber volume percentages (0%, 0.1%, 0.2%, 0.3% and 0.4%) were designed and subjected to different freeze-thaw cycles (0, 25, 50, 75, 100 and 125 times), and then the three-point bending loading test was conducted on the concrete specimens. The results showed that when the content of fiber was less than 0.3%, the higher the content of basalt fibers, the higher the initial fracture toughness, instability toughness and fracture energy of BFRC. While the content of fibers more than 0.3%, the increase of initial fracture toughness of BFRC was not obvious, but the instability toughness and fracture energy would decrease slightly. The freeze-thaw damage of concrete reduced the fracture toughness and fracture energy of concrete. Basalt fibers could restrain the freeze-thaw damage of concrete to a certain extent. The higher the content of fibers, the smaller the freeze-thaw loss of fracture toughness and fracture energy of BFRC were. Based on the bilinear softening constitutive relation of Petersson for concrete, the bilinear softening constitutive relation curve of BFRC subjected to freeze-thaw cycles was derived by fitting freeze-thaw damage.
- BFRC,
- three-point bending loading,
- freeze-thaw cycle,
- fracture damage,
- softening constitutive model

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References(20)

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