Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO<sub>2</sub>
Flax fiber sheets provide the advantages of high specific strength, a short growth cycle, environmental friendliness, wide availability, and low cost. Therefore, in this study, the shear capacities of reinforced concrete (RC) beams strengthened with ordinary flax fiber sheets, flax fiber sheets graf...
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doaj-04721f402a0b46f0814f9198e86a87a52020-11-25T03:31:06ZengMDPI AGMaterials1996-19442020-03-01136143010.3390/ma13061430ma13061430Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO<sub>2</sub>Hongguang Wang0Guijun Xian1School of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaFlax fiber sheets provide the advantages of high specific strength, a short growth cycle, environmental friendliness, wide availability, and low cost. Therefore, in this study, the shear capacities of reinforced concrete (RC) beams strengthened with ordinary flax fiber sheets, flax fiber sheets grafted with nano-TiO<sub>2</sub>, and unidirectional basalt fiber sheets were compared. The bearing characteristics and failure modes of RC beams strengthened with flax fiber sheets were investigated. The results showed that after reinforcement with flax fiber sheets, the bearing capacity and mid-span deflection of the RC beams are considerably improved, and the reinforcing effect of flax fiber sheets grafted with nano-TiO<sub>2</sub> is greater than that of unmodified flax fiber sheets. After reinforcement with flax fiber sheets grafted with nano-TiO<sub>2</sub>, the shear capacity of the RC beams is considerably improved to 653 kN, which is 72.8% higher than that of the unreinforced RC beams. Meanwhile, the mid-range deflection of the beam reached 14.6 mm, which is 75.9% higher than that of the unreinforced RC beams.https://www.mdpi.com/1996-1944/13/6/1430rc beamflax fiber sheetsnano-tio<sub>2</sub>shear strengthening |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hongguang Wang Guijun Xian |
spellingShingle |
Hongguang Wang Guijun Xian Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO<sub>2</sub> Materials rc beam flax fiber sheets nano-tio<sub>2</sub> shear strengthening |
author_facet |
Hongguang Wang Guijun Xian |
author_sort |
Hongguang Wang |
title |
Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO<sub>2</sub> |
title_short |
Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO<sub>2</sub> |
title_full |
Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO<sub>2</sub> |
title_fullStr |
Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO<sub>2</sub> |
title_full_unstemmed |
Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO<sub>2</sub> |
title_sort |
shear capacity of rc beams strengthened with flax fiber sheets grafted with nano-tio<sub>2</sub> |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-03-01 |
description |
Flax fiber sheets provide the advantages of high specific strength, a short growth cycle, environmental friendliness, wide availability, and low cost. Therefore, in this study, the shear capacities of reinforced concrete (RC) beams strengthened with ordinary flax fiber sheets, flax fiber sheets grafted with nano-TiO<sub>2</sub>, and unidirectional basalt fiber sheets were compared. The bearing characteristics and failure modes of RC beams strengthened with flax fiber sheets were investigated. The results showed that after reinforcement with flax fiber sheets, the bearing capacity and mid-span deflection of the RC beams are considerably improved, and the reinforcing effect of flax fiber sheets grafted with nano-TiO<sub>2</sub> is greater than that of unmodified flax fiber sheets. After reinforcement with flax fiber sheets grafted with nano-TiO<sub>2</sub>, the shear capacity of the RC beams is considerably improved to 653 kN, which is 72.8% higher than that of the unreinforced RC beams. Meanwhile, the mid-range deflection of the beam reached 14.6 mm, which is 75.9% higher than that of the unreinforced RC beams. |
topic |
rc beam flax fiber sheets nano-tio<sub>2</sub> shear strengthening |
url |
https://www.mdpi.com/1996-1944/13/6/1430 |
work_keys_str_mv |
AT hongguangwang shearcapacityofrcbeamsstrengthenedwithflaxfibersheetsgraftedwithnanotiosub2sub AT guijunxian shearcapacityofrcbeamsstrengthenedwithflaxfibersheetsgraftedwithnanotiosub2sub |
_version_ |
1724573691749072896 |