Experimental and numerical investigation on the effect of concrete infill in pultruded GFRP CHS intermediate and long columns under axial and eccentric compression

Thumitha Mandula Higgoda; Mohamed Elchalakani; Mehrdad Kimiaei; Adam Wittek; Bo Yang

doi:10.1016/j.istruc.2023.03.046

Experimental and numerical investigation on the effect of concrete infill in pultruded GFRP CHS intermediate and long columns under axial and eccentric compression

Thumitha Mandula Higgoda, Mohamed Elchalakani, Mehrdad Kimiaei, Adam Wittek, Bo Yang

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The paper presents an experimental investigation of concrete-filled (CFFT) pultruded glass fibre-reinforced (GFRP) circular tubular columns under concentric and eccentric loading. The effective slenderness ratios of the CFFTs were 33, 44 and 55 and were tested under two different eccentricities of 28.5 mm and 57 mm. The failure modes observed for the CFFTs include localised hoop rupture and longitudinal splitting of the GFRP tube with concrete crushing. The axial load-carrying capacities of the CFFTs decreased with increasing eccentricity and slenderness. The strength and the ductility of the CFFTs were compared with their circular hollow section (CHS) counterparts tested in a previous study. A P-M interaction curve was developed, and its applicability was assessed against the experimental results for different slenderness ratios. The ultimate axial load and the locus and nature of the failure modes of CFFTs predicted from the developed finite element models were in good agreement with the experimental observations. The extent of damage of the GFRP tube in the CFFTs was compared to the damage of the GFRP CHS columns using FE analysis employing the Hashin damage material model for GFRP tube.

Original language	English
Pages (from-to)	137-157
Number of pages	21
Journal	Structures
Volume	51
Early online date	15 Mar 2023
DOIs	https://doi.org/10.1016/j.istruc.2023.03.046
Publication status	Published - May 2023

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10.1016/j.istruc.2023.03.046

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@article{ef82954569ec4e06b1cb54182667d265,

title = "Experimental and numerical investigation on the effect of concrete infill in pultruded GFRP CHS intermediate and long columns under axial and eccentric compression",

abstract = "The paper presents an experimental investigation of concrete-filled (CFFT) pultruded glass fibre-reinforced (GFRP) circular tubular columns under concentric and eccentric loading. The effective slenderness ratios of the CFFTs were 33, 44 and 55 and were tested under two different eccentricities of 28.5 mm and 57 mm. The failure modes observed for the CFFTs include localised hoop rupture and longitudinal splitting of the GFRP tube with concrete crushing. The axial load-carrying capacities of the CFFTs decreased with increasing eccentricity and slenderness. The strength and the ductility of the CFFTs were compared with their circular hollow section (CHS) counterparts tested in a previous study. A P-M interaction curve was developed, and its applicability was assessed against the experimental results for different slenderness ratios. The ultimate axial load and the locus and nature of the failure modes of CFFTs predicted from the developed finite element models were in good agreement with the experimental observations. The extent of damage of the GFRP tube in the CFFTs was compared to the damage of the GFRP CHS columns using FE analysis employing the Hashin damage material model for GFRP tube.",

keywords = "Concrete filled, GFRP, Localised hoop rupture, Longitudinal splitting, Pultruded",

author = "Higgoda, {Thumitha Mandula} and Mohamed Elchalakani and Mehrdad Kimiaei and Adam Wittek and Bo Yang",

note = "Funding Information: The authors would like to acknowledge VHM Solutions, Australia, for their technical and financial support as well as the supply of the materials required to undertake this research. The authors also acknowledge the Master of engineering students: Vincent Lim and Annie Vu for their contributions in the workshop. The authors are thankful to the senior lab technicians Stephen Naulls and Richard Bowles for their help in setting up the experiments in the lab. The research was conducted while the first author was in receipt of a financial scholarship co-funded by the University of Western Australia and VHM Solutions. Financial support from Woodside Energy through Riverlab project grants is also acknowledged. Publisher Copyright: {\textcopyright} 2023 Institution of Structural Engineers",

year = "2023",

month = may,

doi = "10.1016/j.istruc.2023.03.046",

language = "English",

volume = "51",

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journal = "Structures",

issn = "2352-0124",

publisher = "Elsevier",

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TY - JOUR

T1 - Experimental and numerical investigation on the effect of concrete infill in pultruded GFRP CHS intermediate and long columns under axial and eccentric compression

AU - Higgoda, Thumitha Mandula

AU - Elchalakani, Mohamed

AU - Kimiaei, Mehrdad

AU - Wittek, Adam

AU - Yang, Bo

N1 - Funding Information: The authors would like to acknowledge VHM Solutions, Australia, for their technical and financial support as well as the supply of the materials required to undertake this research. The authors also acknowledge the Master of engineering students: Vincent Lim and Annie Vu for their contributions in the workshop. The authors are thankful to the senior lab technicians Stephen Naulls and Richard Bowles for their help in setting up the experiments in the lab. The research was conducted while the first author was in receipt of a financial scholarship co-funded by the University of Western Australia and VHM Solutions. Financial support from Woodside Energy through Riverlab project grants is also acknowledged. Publisher Copyright: © 2023 Institution of Structural Engineers

PY - 2023/5

Y1 - 2023/5

N2 - The paper presents an experimental investigation of concrete-filled (CFFT) pultruded glass fibre-reinforced (GFRP) circular tubular columns under concentric and eccentric loading. The effective slenderness ratios of the CFFTs were 33, 44 and 55 and were tested under two different eccentricities of 28.5 mm and 57 mm. The failure modes observed for the CFFTs include localised hoop rupture and longitudinal splitting of the GFRP tube with concrete crushing. The axial load-carrying capacities of the CFFTs decreased with increasing eccentricity and slenderness. The strength and the ductility of the CFFTs were compared with their circular hollow section (CHS) counterparts tested in a previous study. A P-M interaction curve was developed, and its applicability was assessed against the experimental results for different slenderness ratios. The ultimate axial load and the locus and nature of the failure modes of CFFTs predicted from the developed finite element models were in good agreement with the experimental observations. The extent of damage of the GFRP tube in the CFFTs was compared to the damage of the GFRP CHS columns using FE analysis employing the Hashin damage material model for GFRP tube.

AB - The paper presents an experimental investigation of concrete-filled (CFFT) pultruded glass fibre-reinforced (GFRP) circular tubular columns under concentric and eccentric loading. The effective slenderness ratios of the CFFTs were 33, 44 and 55 and were tested under two different eccentricities of 28.5 mm and 57 mm. The failure modes observed for the CFFTs include localised hoop rupture and longitudinal splitting of the GFRP tube with concrete crushing. The axial load-carrying capacities of the CFFTs decreased with increasing eccentricity and slenderness. The strength and the ductility of the CFFTs were compared with their circular hollow section (CHS) counterparts tested in a previous study. A P-M interaction curve was developed, and its applicability was assessed against the experimental results for different slenderness ratios. The ultimate axial load and the locus and nature of the failure modes of CFFTs predicted from the developed finite element models were in good agreement with the experimental observations. The extent of damage of the GFRP tube in the CFFTs was compared to the damage of the GFRP CHS columns using FE analysis employing the Hashin damage material model for GFRP tube.

KW - Concrete filled

KW - GFRP

KW - Localised hoop rupture

KW - Longitudinal splitting

KW - Pultruded

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DO - 10.1016/j.istruc.2023.03.046

M3 - Article

AN - SCOPUS:85150205712

SN - 2352-0124

VL - 51

SP - 137

EP - 157

JO - Structures

JF - Structures

ER -

Experimental and numerical investigation on the effect of concrete infill in pultruded GFRP CHS intermediate and long columns under axial and eccentric compression

Abstract

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