TY - JOUR
T1 - Web crippling performance of pultruded GFRP C sections strengthened by fibre-reinforced epoxy composite
AU - Lakhiar, Muhammad Tahir
AU - Kong, Sih Ying
AU - Bai, Yu
AU - Miah, Md Jihad
AU - Syamsir, Agusril
N1 - Funding Information:
The authors acknowledge financial support provided by Monash University under Australia-Malaysia Travel Grant Scheme and Faculty-School Joint PhD Scholarship program.
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/7/15
Y1 - 2023/7/15
N2 - This study aims to improve the web crippling performance of pultruded glass fibre-reinforced polymer (GFRP) C sections using fibre-reinforced epoxy composite (FEC). The strengthened GFRP C sections were subjected to two loading conditions: interior-two-flange (ITF) and exterior two-flange (ETF). The parameters considered were bearing lengths, FEC strengthening length and thicknesses. Two failure modes, namely web-flange junction failure and web buckling failure were observed for the pultruded GFRP C sections under ETF loading conditions as the bearing length changed. While the combination of the web-flange junction and FEC crushing failures were observed under ITF loading conditions at 20 mm and 50 mm bearing lengths. Furthermore, the average web crippling capacity of strengthened GFRP C sections improved by up to 426 % and 488 %, in comparison to control samples under ETF and ITF loading conditions, respectively. The average web crippling capacity of pultruded GFRP C sections increased up to 45 % when the bearing length increased from 20 mm to 50 mm. The finite element (FE) outcomes showed an agreement with experimental results in the context of failure patterns, load-displacement profiles and web crippling capacities. Finally, equations were proposed to estimate the web crippling capacity of pultruded GFRP C sections strengthened with FEC.
AB - This study aims to improve the web crippling performance of pultruded glass fibre-reinforced polymer (GFRP) C sections using fibre-reinforced epoxy composite (FEC). The strengthened GFRP C sections were subjected to two loading conditions: interior-two-flange (ITF) and exterior two-flange (ETF). The parameters considered were bearing lengths, FEC strengthening length and thicknesses. Two failure modes, namely web-flange junction failure and web buckling failure were observed for the pultruded GFRP C sections under ETF loading conditions as the bearing length changed. While the combination of the web-flange junction and FEC crushing failures were observed under ITF loading conditions at 20 mm and 50 mm bearing lengths. Furthermore, the average web crippling capacity of strengthened GFRP C sections improved by up to 426 % and 488 %, in comparison to control samples under ETF and ITF loading conditions, respectively. The average web crippling capacity of pultruded GFRP C sections increased up to 45 % when the bearing length increased from 20 mm to 50 mm. The finite element (FE) outcomes showed an agreement with experimental results in the context of failure patterns, load-displacement profiles and web crippling capacities. Finally, equations were proposed to estimate the web crippling capacity of pultruded GFRP C sections strengthened with FEC.
KW - ETF
KW - Fibre-reinforced epoxy composite
KW - GFRP
KW - ITF
KW - Strengthening
KW - Web crippling
UR - http://www.scopus.com/inward/record.url?scp=85153356369&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2023.117047
DO - 10.1016/j.compstruct.2023.117047
M3 - Article
AN - SCOPUS:85153356369
SN - 0263-8223
VL - 316
JO - Composite Structures
JF - Composite Structures
M1 - 117047
ER -