To investigate the bond properties of polyvinyl alcohol fiber reinforced engineered cementitious composites (PVA-ECC) and basalt fiber reinforced polymer (BFRP) bars

the surface form of BFRP bars (wrapped ribbed

sandblasted wrapped ribbed)

anchorage length ( 5d

7d

9d )

diameter (8

0

12 mm)

thickness of PVA-ECC protective layer (0

5

5

5 mm) and PVA-ECC strength (C50

C80) are taken as parameters

and 28 bond anchorage specimens of PVA-ECC and BFRP bars were designed and manufactured by pull-out test. By observing and analyzing the failure mode

bond strength and bond-slip curve of each specimen

the influence of various factors on the bond performance of PVA-ECC and BFRP bars were explored. Finally

by analyzing the applicability of the existing constitutive model

the bond-slip constitutive model of BFRP bars and PVA-ECC were established with reference to the test results. The results show that the specimens with smaller protective layer thickness (5 mm) are prone to fracture failure

and the bond strength is only 39.59% of that of normal specimens. Sandblasting on the surface of BFRP bars could increase the maximum average bond stress. With the decrease of anchorage length

the bond strength between BFRP bars and PVA-ECC increase gradually. Keeping the relative rib height unchanged while increasing the diameter of BFRP bars could avoid the negative effects of increasing the diameter of BFRP bars on the bond properties. When the strength of PVA-ECC increases from 50.5MPa to 81.3MPa

the bond strength increases by 45.53%. Avoiding the smaller protective layer thickness of BFRP bars or increasing the diameter of BFRP bars while keeping the relative rib height unchanged could ensure that PVA-ECC and BFRP bars exhibit sufficient bond strength.