Fig. 7. Effects of different fiber types and dosages on shear
strength[53]
SF:
steel
fiber; PF:
polypropylene
fiber; CF:
carbon
fiber; PVF:
polyvinyl
alcohol fiber
The high shear resistance of fiber-reinforced polymer is more widely
used on walls. According to the study of Harry et al.[13], the
tested composite polyvinyl alcohol fiber wrapped macroscopic synthetic
fiber reinforced concrete wall samples present significantly higher
values of interfacial shear strength compared with the test wall samples
filled with ordinary concrete. The maximum shear load and interfacial
shear strength increases by 93.5%. Tran et al.[54] studied the
shear capacity of fiber reinforced geopolymeric concrete beams under
impact load, and found that the addition of fibers significantly
improves the impact response of geopolymeric beams in terms of maximum
and residual displacement and reaction force, and reduces negative
cracks and spalling cracks. Lakavath et al.[4] conducted
experimental and numerical studies on the shear behavior of large
synthetic fiber reinforced prestressed concrete beams, and found that a
low fiber volume increase of 0.5% does not significantly improve the
shear behavior. However, the test and finite element results of the
beams with higher volume fractions (1.0% and 1.5%) significantly
improves the post-cracking behavior, ductility and ultimate shear
resistance of the beams[55].