Prof. Dr. Halim Kadhim Hussein and Prof. Dr. Farid Hamid Majeed from the Department of Civil Engineering, along with PhD student and lecturer Ali Abdul-Zahra Hassan (from the Technical Institute of Amarah at the Southern Technical University), have published a research paper titled:
"Experimental Investigation of Cold-Formed Steel Composite Bridge Girder in Various Shapes under Repeated Loads"
The paper appeared in the journal Revue des Composites et des Matériaux Avancés. This is a reputable international journal indexed in the Scopus database, ranked in the third quartile (Q3) of international scientific journals, and holding a CiteScore of 2.
A composite action of a cold-formed steel section and a concrete deck slab depends on the degree of interaction between the steel section girders and the concrete deck slab. In addition to the degree of interaction, the shape of the cold-formed steel section significantly influences the stress distribution of the deck slab under repeated loadings. In this study, all specimens were designed for full interaction and varied in cold-formed section shapes in repeated load tests. Four shapes were investigated in this research: tub, open-box, and double C with and without lips. Four specimens were designed and fabricated to study the flexural and failure behavior of cold-formed steel sections and concrete deck slab in terms of ductility, stiffness, ultimate failure load, crack propagation, residual deflection, and cumulative energy. The experimental results show that the double C-lipped specimen increases the ductility factor by 61%, 36%, and 5% compared to the open box, tub, and double C specimens, respectively. Additionally, the residual deflection of the double C-lipped specimen was lower during the repeated loading stages, whereas the tub specimen recorded a higher value. The results indicated that the cumulative energy of the double C-lipped specimen was the highest value.
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