Article
Experimental study of the quasi-static axial compressive resistance of pultruded GFRP composite stub columns
Construction and Building Materials
— 2024 — Elsevier
Key information
Authors:
Published in
09/28/2024
Abstract
This paper presents an experimental investigation on the crushing behaviour of full-section pultruded glass fibre reinforced polymer (pGFRP) profiles with 11 different cross-section geometries, encompassing 6 different shapes (C, I, W, SHS, RHS, L sections). Quasi-static axial compressive tests were conducted on stub column specimens, mitigating second-order and buckling effects. The crushing phenomenon of the pGFRP profiles was investigated regarding the following aspects: (i) influence of end surface flatness, (ii) analysis of load/stress vs. strain behaviour, (iii) definition of relative slenderness thresholds to avoid buckling, (iv) determination of full-section compressive strength for various cross-sections, and (v) correlation of geometrical and mechanical experimental data. The results show that when the relative slenderness was limited to 0.7, no buckling occurred, and the load was uniformly applied across the section of the profiles. Additionally, for the different cross-section geometries, the estimates of resistance to crushing of pGFRP stub columns obtained from compressive coupon tests were non-conservative: in average, the resistance to crushing of full-section stub columns was around 60 % of those estimates. Unlike the coupon tests, the stub columns presented complex failure with multiple damage modes, which were attributed to the non-uniformity of material properties across the section walls. The correlation analysis provided insights into the linear dependency of the full-section compressive strength with geometrical and material properties. Surprisingly, shear strengths were shown to play a more relevant role in the crushing phenomenon of stub columns than compressive strength. The findings of this study will contribute to the drafting of improved design guidelines able to estimate more accurately (and likely more reliably) the compressive resistance to crushing.
Publication details
Authors in the community:
João Alfredo de Lazzari
ist428971
João Pedro Ramôa Ribeiro Correia
ist14239
Publication version
AM - Accepted manuscript
Publisher
Elsevier
Link to the publisher's version
https://www.sciencedirect.com/science/article/pii/S0950061824033944
Title of the publication container
Construction and Building Materials
First page or article number
1
Last page
21
Volume
449
Issue
138252
Fields of Science and Technology (FOS)
civil-engineering - Civil engineering
Keywords
- Pultruded profiles
- crushing
- delamination
- axially compressed members
- experimental tests
- design guidelines
Publication language (ISO code)
eng - English
Rights type:
Only metadata available
Creative Commons license
CC-BY - CC-BY
Financing entity
Fundação para a Ciência e a Tecnologia
Title of the project, award or grant: Direct Strength Method for pultruded FRP members: experiments, numerical simulation and design
Funding Stream: Ph.D. scholarship
Identifier for the funding entity: http://dx.doi.org/10.54499/2021.04925.BD
Type of identifier of the funding entity: Crossref Funder
Number for the project, award or grant: SFRH/BD/04925/2021
Financing entity
Fundação para a Ciência e a Tecnologia
Title of the project, award or grant: Ductility and seismic performance of GFRP structures
Funding Stream: Research contract
Identifier for the funding entity: http://dx.doi.org/10.54499/CEECIND/04648/2017/CP1461/CT0015
Type of identifier of the funding entity: Crossref Funder
Number for the project, award or grant: CEECIND/04648/2017/CP1461/CT0015
Financing entity
Fundação para a Ciência e a Tecnologia
Title of the project, award or grant: Development of reliability-based design guidelines for FRP structures
Funding Stream: Reliable-FRP
Identifier for the funding entity: http://dx.doi.org/10.54499/PTDC/ECI-EGC/3916/2021
Type of identifier of the funding entity: Crossref Funder
Number for the project, award or grant: PTDC/ECI-EGC/3916/2021
Financing entity
Fundação para a Ciência e a Tecnologia
Title of the project, award or grant: Associate Laboratory of Energy, Transports and Aeronautics
Funding Stream: 6817 - DCRRNI ID
Identifier for the funding entity: http://dx.doi.org/10.54499/UIDB/50022/2020
Type of identifier of the funding entity: Crossref Funder
Number for the project, award or grant: UIDB/50022/2020
Financing entity
Fundação para a Ciência e a Tecnologia
Title of the project, award or grant: Civil Engineering Research and Innovation for Sustainability
Funding Stream: 6817 - DCRRNI ID
Identifier for the funding entity: http://dx.doi.org/10.54499/UIDB/04625/2020
Type of identifier of the funding entity: Crossref Funder
Number for the project, award or grant: UIDB/04625/2020