TY - JOUR
T1 - Experimental and analytical study on shear mechanism of rubber-ring perfobond connector
AU - Liu, Yangqing
AU - Xin, Haohui
AU - Liu, Yuqing
PY - 2019
Y1 - 2019
N2 - This paper proposed an easy-installed rubber-ring perfobond connector (RPBL) to mitigate the shear concentration of partial holes in perfobond connector (PBL) groups. Four modified push-out tests with different rubber ring thicknesses were conducted to investigate the shear behavior of RPBLs. The test results showed that specimens experienced four stages, including (i) damage of bond, (ii) shear fractures of concrete dowels, (iii) tension-shear yielding of perforated rebars, and (iv) hardening and fractures of perforated rebars. The rubber rings can significantly improve the slip capacity and drop the shear stiffness of perfobond connectors. Compared with ordinary perfobond connectors, the yield slips of specimens with 2 mm, 4 mm and 6 mm thick rubber rings increase by 304%, 509% and 745%. Further, three-dimensional nonlinear parametric FEA (finite element analysis) models of modified push-out tests were established and verified by the test results. The shear mechanism of each component and the effects of rubber ring thickness on shear behaviors were discussed. Finally, the shear yield load equations and shear capacity equations of PBL and RPBL were proposed based on the collected modified push-out test results. The calculated results agree well with the test results.
AB - This paper proposed an easy-installed rubber-ring perfobond connector (RPBL) to mitigate the shear concentration of partial holes in perfobond connector (PBL) groups. Four modified push-out tests with different rubber ring thicknesses were conducted to investigate the shear behavior of RPBLs. The test results showed that specimens experienced four stages, including (i) damage of bond, (ii) shear fractures of concrete dowels, (iii) tension-shear yielding of perforated rebars, and (iv) hardening and fractures of perforated rebars. The rubber rings can significantly improve the slip capacity and drop the shear stiffness of perfobond connectors. Compared with ordinary perfobond connectors, the yield slips of specimens with 2 mm, 4 mm and 6 mm thick rubber rings increase by 304%, 509% and 745%. Further, three-dimensional nonlinear parametric FEA (finite element analysis) models of modified push-out tests were established and verified by the test results. The shear mechanism of each component and the effects of rubber ring thickness on shear behaviors were discussed. Finally, the shear yield load equations and shear capacity equations of PBL and RPBL were proposed based on the collected modified push-out test results. The calculated results agree well with the test results.
KW - Composite bridges
KW - Finite element analysis
KW - Modified push-out test
KW - Perfobond connectors
KW - Rubber
KW - Shear behavior
UR - http://www.scopus.com/inward/record.url?scp=85068935933&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2019.109382
DO - 10.1016/j.engstruct.2019.109382
M3 - Article
AN - SCOPUS:85068935933
SN - 0141-0296
VL - 197
JO - Engineering Structures
JF - Engineering Structures
M1 - 109382
ER -