TY - JOUR
T1 - Behavior of various anchorage systems used for shear strengthening of concrete structures with externally bonded FRP sheets
AU - Bae, Sang Wook
AU - Belarbi, Abdeldjelil
PY - 2013/9/1
Y1 - 2013/9/1
N2 - Abstract Efforts to prevent the debonding failure mode of externally bonded fiber-reinforced polymer (FRP) strengthening systems have led to the investigation of many different kinds of anchorage systems. An effective anchorage system allows externally bonded FRP reinforcements to continue carrying load, even after debonding occurs. In this study, an experimental program was performed on six full-scale RC T-beams strengthened in shear using externally bonded carbon FRP sheets with three different anchorage systems, the so-called (1) discontinuous mechanical anchorage (DMA) system, (2) sandwich discontinuous mechanical anchorage (SDMA) system, and (3) additional horizontal strips (HS) system. The experimental results showed that the SDMA system performed best, followed by the DMA and HS systems. The RC T-beams strengthened with the SDMA system showed a 59-91% increase in shear strength, altering the failure mode from FRP debonding to FRP rupture. In addition, the shear contribution of internal transverse steel reinforcement (stirrups) changes, depending on the types of anchorage system.
AB - Abstract Efforts to prevent the debonding failure mode of externally bonded fiber-reinforced polymer (FRP) strengthening systems have led to the investigation of many different kinds of anchorage systems. An effective anchorage system allows externally bonded FRP reinforcements to continue carrying load, even after debonding occurs. In this study, an experimental program was performed on six full-scale RC T-beams strengthened in shear using externally bonded carbon FRP sheets with three different anchorage systems, the so-called (1) discontinuous mechanical anchorage (DMA) system, (2) sandwich discontinuous mechanical anchorage (SDMA) system, and (3) additional horizontal strips (HS) system. The experimental results showed that the SDMA system performed best, followed by the DMA and HS systems. The RC T-beams strengthened with the SDMA system showed a 59-91% increase in shear strength, altering the failure mode from FRP debonding to FRP rupture. In addition, the shear contribution of internal transverse steel reinforcement (stirrups) changes, depending on the types of anchorage system.
KW - Anchorage
KW - Concrete beam
KW - Debonding
KW - Epoxy bonded
KW - Fiber-reinforced polymer
KW - Retrofitting
KW - Shear
UR - http://www.scopus.com/inward/record.url?scp=84882330377&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)BE.1943-5592.0000420
DO - 10.1061/(ASCE)BE.1943-5592.0000420
M3 - Article
AN - SCOPUS:84882330377
SN - 1084-0702
VL - 18
SP - 837
EP - 847
JO - Journal of Bridge Engineering
JF - Journal of Bridge Engineering
IS - 9
ER -