Title:
Effect of Fiber-Reinforced Polymer Confinement on Bond Strength of Hooked Bars in High-Strength Concrete
Author(s):
Bilal S. Hamad and Charbel D. Bou Abs
Publication:
Structural Journal
Volume:
106
Issue:
6
Appears on pages(s):
831-839
Keywords:
beam-column joints; fiber-reinforced polymer; high-strength concrete; hooked-bar anchorages; structural detailing
DOI:
10.14359/51663184
Date:
11/1/2009
Abstract:
To assess the viability of the external confinement of high-strength concrete beam-column joints with carbon fiber-reinforced polymer (CFRP) sheets in increasing the bond strength of hooked bars anchored in the joints, 12 hooked bar specimens were tested. The specimen simulated the rigid connection of a cantilever beam to a column. The variables were the beam tensile bar size, anchorage length, mode of confinement of the beam hooked bars in the beamcolumn joint, and presence or absence of fiber-reinforced polymer (FRP) wraps. The nominal or intended concrete compressive strength was 60 MPa (8.7 ksi). Test results of the study were analyzed and the effect of FRP was assessed by comparing performance of specimens whose beam-column anchorage zones were wrapped with FRP sheets with analogous specimens with no FRP. FRP sheets were found effective in increasing the anchorage capacity and the ductility of the load-deflection history.