Title:
Deflection and Cracking Behavior of RC Beams Strengthened in Flexure
Author(s):
S. Matthys and L. Taerwe
Publication:
Symposium Paper
Volume:
264
Issue:
Appears on pages(s):
95-110
Keywords:
cracking; deflection; experimental testing; fiber-reinforced polymer (FRP);
flexural strengthening.
DOI:
10.14359/51663262
Date:
10/1/2009
Abstract:
To understand and predict the effect of externally bonded reinforcement (EBR) on the serviceability behavior of FRP (fiber-reinforced polymer) strengthened members, four-point bending tests have been executed on reinforced concrete (RC) beams with span length 3.8 m (150 in.). This
experimental campaign was further complemented with tests on strengthened tensile members. These so-called ‘tension stiffening’ tests typically consist of a tensile test on a reinforcing bar embedded in a FRP strengthened concrete prism. As the FRP EBR increases the stiffness of the beams and as a
denser crack pattern with smaller crack widths is obtained, the serviceability limit state (SLS) of the strengthened members is positively influenced. Hereby, the behavior in terms of deflection and crack widths can be predicted in a fairly accurate way.