TY - JOUR
T1 - Negative moment region flexural strengthening system of RC T-beams with half-embedded NSM FRP rods
T2 - a parametric analytical approach
AU - Haryanto, Yanuar
AU - Hu, Hsuan Teh
AU - Han, Ay Lie
AU - Hsiao, Fu Pei
AU - Teng, Charng Jen
AU - Hidayat, Banu Ardi
AU - Wariyatno, Nanang Gunawan
N1 - Funding Information:
This research was funded by the Ministry of Science and Technology, Taiwan (R.O.C) under grant number MOST-108-2625-M-006-006. The first author acknowledges the support of the Ministry of Education, Taiwan (R.O.C) through the provision of the Elite Scholarship as well as the support of the CTCI Foundation in the form of the Research Scholarship for International Graduate Students.
Funding Information:
The first author acknowledges the support of the Ministry of Education, Taiwan (R.O.C) through the provision of the Elite Scholarship as well as the support of the CTCI Foundation in the form of the Research Scholarship for International Graduate Students.
Publisher Copyright:
© 2021 The Chinese Institute of Engineers.
PY - 2021
Y1 - 2021
N2 - Fiber Reinforced Polymer (FRP) rods are considered to be the most effective in retrofitting to increase the strength of reinforced concrete (RC) structures through Near-Surface Mounted (NSM) technique. There are, however, frequent cases encountered by engineers where the embedment depth mandated by ACI 440.2 R-08 code is not achievable in the field implementation. It has also been discovered that it is more challenging to strengthen the negative moment region of concrete members in comparison with the positive region. This research was conducted to determine the behavior of RC T-beams strengthened in the negative moment region using half-embedded NSM FRP rods. The findings were associated with the Modified Compression Field Theory (MCFT) which was applied in the analytical models. The model proposed was validated through a comparison with previous experimental study that showed half-embedded NSM FRP was effective as another method in comparison with the conventional soffit strengthening systems in retrofitting RC T-beams in the negative moment region, and good agreement was obtained. After that, a parametric analysis was initiated to determine the influence of FRP rod diameters, the compressive strength of concretes, the ratio of steel reinforcement as well as the materials used for the FRP on the flexural behavior of strengthened beams.
AB - Fiber Reinforced Polymer (FRP) rods are considered to be the most effective in retrofitting to increase the strength of reinforced concrete (RC) structures through Near-Surface Mounted (NSM) technique. There are, however, frequent cases encountered by engineers where the embedment depth mandated by ACI 440.2 R-08 code is not achievable in the field implementation. It has also been discovered that it is more challenging to strengthen the negative moment region of concrete members in comparison with the positive region. This research was conducted to determine the behavior of RC T-beams strengthened in the negative moment region using half-embedded NSM FRP rods. The findings were associated with the Modified Compression Field Theory (MCFT) which was applied in the analytical models. The model proposed was validated through a comparison with previous experimental study that showed half-embedded NSM FRP was effective as another method in comparison with the conventional soffit strengthening systems in retrofitting RC T-beams in the negative moment region, and good agreement was obtained. After that, a parametric analysis was initiated to determine the influence of FRP rod diameters, the compressive strength of concretes, the ratio of steel reinforcement as well as the materials used for the FRP on the flexural behavior of strengthened beams.
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U2 - 10.1080/02533839.2021.1936646
DO - 10.1080/02533839.2021.1936646
M3 - Article
AN - SCOPUS:85108307231
SN - 0253-3839
VL - 44
SP - 553
EP - 561
JO - Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A
JF - Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A
IS - 6
ER -