Behavior of axially loaded concrete composite columns encased with <scp>GFRP</scp> and steel I‐sections

Ban Fadhil Salman; Abbas A. Allawi; Ayman El‐Zohairy

doi:10.1002/suco.70249

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Publication Date

Mon Jul 28 2025

Journal Name

Structural Concrete

DOI

10.1002/suco.70249

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Behavior of axially loaded concrete composite columns encased with <scp>GFRP</scp> and steel I‐sections

Ban Fadhil Salman

Abbas A. Allawi

Ayman El‐Zohairy

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AbstractThe aim of this investigation is to evaluate the experimental and numerical effectiveness of a new kind of composite column by using Glass Fiber‐Reinforced Polymer (GFRP) I‐section as well as steel I‐section in comparison to the typical reinforced concrete one. The experimental part included testing six composite columns categorized into two groups according to the slenderness ratio and tested under concentric axial load. Each group contains three specimens with the same dimensions and length, while different cross‐section configurations were used. Columns with reinforced concrete cross‐section (reference column), encased GFRP I‐section, and encased steel I‐section were adopted in each group. The modes of failure, axial loads, axial displacements, and strains in the concrete were the main experimental results. The observed typical mode of failure was a compression failure, and the concrete cover was splitting mostly at the column mid‐height. The load‐carrying capacities of the long composite specimens with the encased GFRP and steel I‐sections increased by approximately 11.2% and 15.8%, respectively, compared to the control column. However, these improvements were 12.0% and 24.3% in the case of short composite columns. In short columns, the failure load increased by 11% in comparison to the long ones. Numerical simulations were developed to verify the experimental results. The FE results evince good agreement with the experimental results in terms of the ultimate axial loads, deformations, and modes of failure.

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Publication Date

Tue Jan 18 2022

Journal Name

Materials Science Forum

The Effect of Gamma Radiation on the Manufactured HgBa2Ca2Cu2.4Ag0.6O8+δ Compound

Gamma doses radiation

crystal size

strain

degree of crystallinity

Scherrer

crystallinity and Williamson equations.

zainab j

Balqees A.

Mohammed A.

Kareem A.

Auday H.

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In this article four samples of HgBa₂Ca₂Cu_2.4Ag_0.6O_8+δ were prepared and irradiated with different doses of gamma radiation 6, 8 and 10 Mrad. The effects of gamma irradiation on structure of HgBa₂Ca₂Cu_2.4Ag_0.6O_8+δ samples were characterized using X-ray diffraction. It was concluded that there effect on structure by gamma irradiation. Scherrer, crystallization, and Williamson equations were applied based on the X-ray diffraction diagram and for all gamma doses, to calculate crystal size, strain, and degree of crystallinity. I

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