TY - JOUR
T1 - On the FE modelling of RC beams with a fibre-reinforced polymer (FRP)-strengthened web opening
AU - Nie, X. F.
AU - Zhang, S. S.
AU - Yu, T.
N1 - Funding Information:
The authors are grateful for the financial support received from the Research Grants Council of the Hong Kong Special Administrative Region (Project No.: PolyU 5273/11E) and the National Natural Science Foundation of China (Project No. 51878310 and Project No. 52008183). The work presented in this paper was undertaken under the supervision of Prof. Jin-Guang Teng from The Hong Kong Polytechnic University. The authors are grateful to Prof. Teng for his contributions to this work. Data Availability. The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.
Funding Information:
The authors are grateful for the financial support received from the Research Grants Council of the Hong Kong Special Administrative Region (Project No.: PolyU 5273/11E) and the National Natural Science Foundation of China (Project No. 51878310 and Project No. 52008183). The work presented in this paper was undertaken under the supervision of Prof. Jin-Guang Teng from The Hong Kong Polytechnic University. The authors are grateful to Prof. Teng for his contributions to this work.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/9/1
Y1 - 2021/9/1
N2 - In order to realize the strong column-weak beam hierarchy in existing reinforced concrete (RC) frames, a novel seismic retrofit technique (i.e., beam opening technique or BO technique) was proposed. The BO technique involves the cutting of a web opening in the RC T-section beam to weaken its flexural capacity, in combination with the installation of a fibre-reinforced polymer (FRP) strengthening system around the opening to offset the loss in shear capacity caused by the opening. While extensive experimental studies have verified the effectiveness of the BO technique, this paper presents a finite element (FE) study on the structural behaviour of RC beams with an FRP-strengthened web opening, for a more comprehensive and in-depth understanding of the performance of such beams. Two constitutive models of concrete were investigated, namely, the concrete damaged plasticity (DP) model and the brittle cracking (BC) model. Through detailed comparisons, it was found that for specimens failing in a flexural mode, the DP model is more appropriate; while for specimens failing in a shear mode, the BC model with the secant modulus of concrete adopted provides better predictions. A simple method for the selection of a proper FE approach is finally proposed.
AB - In order to realize the strong column-weak beam hierarchy in existing reinforced concrete (RC) frames, a novel seismic retrofit technique (i.e., beam opening technique or BO technique) was proposed. The BO technique involves the cutting of a web opening in the RC T-section beam to weaken its flexural capacity, in combination with the installation of a fibre-reinforced polymer (FRP) strengthening system around the opening to offset the loss in shear capacity caused by the opening. While extensive experimental studies have verified the effectiveness of the BO technique, this paper presents a finite element (FE) study on the structural behaviour of RC beams with an FRP-strengthened web opening, for a more comprehensive and in-depth understanding of the performance of such beams. Two constitutive models of concrete were investigated, namely, the concrete damaged plasticity (DP) model and the brittle cracking (BC) model. Through detailed comparisons, it was found that for specimens failing in a flexural mode, the DP model is more appropriate; while for specimens failing in a shear mode, the BC model with the secant modulus of concrete adopted provides better predictions. A simple method for the selection of a proper FE approach is finally proposed.
KW - Dynamic analysis approach
KW - Fibre-reinforced polymer (FRP) strengthening
KW - Finite element (FE) model
KW - Reinforced concrete (RC) beam
KW - Web opening
UR - http://www.scopus.com/inward/record.url?scp=85107660110&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2021.114161
DO - 10.1016/j.compstruct.2021.114161
M3 - Journal article
AN - SCOPUS:85107660110
SN - 0263-8223
VL - 271
JO - Composite Structures
JF - Composite Structures
M1 - 114161
ER -