Article, 2023

Web crippling performance of pultruded GFRP C sections strengthened by fibre-reinforced epoxy composite

Composite Structures, ISSN 0263-8223, 1879-1085, Volume 316, Page 117047, 10.1016/j.compstruct.2023.117047

Contributors

Lakhiar, Muhammad Tahir 0000-0002-5628-1214 [1] [2] Kong, Sih Ying 0000-0003-3321-7989 (Corresponding author) [1] Bai, Yu [2] Miah, Jihad [3] [4] Syamsir, Agusril 0000-0002-5919-0588 [5]

Affiliations

  1. [1] Monash University Malaysia
    2. [NORA names: Malaysia; Asia, South];
  2. [2] Monash University
    3. [NORA names: Australia; Oceania; OECD];
  3. [3] Aarhus University
    4. [NORA names: AU Aarhus University; University; Denmark; Europe, EU; Nordic; OECD];
  4. [4] University of Asia Pacific
    5. [NORA names: Bangladesh; Asia, South];
  5. [5] Universiti Tenaga Nasional
    6. [NORA names: Malaysia; Asia, South]

Abstract

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.

Keywords

C-section, ETFs, Web, agreement, buckling failure, capacity, combination, comparison, comparison to control samples, composition, conditions, context, control samples, crushing failure, elements, epoxy composites, equations, experimental results, failure, failure modes, failure patterns, fiber reinforced epoxy composites, fiber-reinforced polymer, finite element, glass fiber-reinforced polymer, interior-two-flange, interior-two-flange loading conditions, junction, junctional failure, length, load, load-displacement profile, loading conditions, mode, outcomes, parameters, patterns, polymer, profile, pultruded glass fiber-reinforced polymer, results, samples, section, study, thickness, web crippling capacity, web-flange junction

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