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Hussain, Haleem K.
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Civil Engineering, Building, Construction & Architecture Education Environmental Science Languange, Linguistic, Communication & Media Medicine & Pharmacology Physics

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High Strength Concrete Beams Reinforced with Hooked Steel Fibers under Pure Torsion Hussain, Haleem K.; Zewair, Mustafa Shareef; Ahmed, Mazin Abdulimam
Civil Engineering Journal Vol 8, No 1 (2022): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2022-08-01-07

Abstract

A study of the behavior of fibers in high-strength reinforced concrete beams is presented in this paper. Twelve reinforced concrete beams were tested under a pure torsion load. Different compressive strengths (45.2, 64.7, and 84.8 MPa) and fiber volume fractions (0, 0.25, 0.5, and 0.75) with variable spacing between transverse reinforcements have been used. It was discovered that the maximum torque of a high-strength concrete beam is increased by about 20.3, 25.6, and 27.1% when the fractional volume of fiber is increased from 0 to 0.25, 0.5 and 0.75 respectively (when the compressive strength is 45.2 MPa and the transverse reinforcement spacing is 100 mm). The test results show that the ultimate torsional strength becomes higher when the concrete compressive strength increases, and this percentage increase becomes higher with increasing steel fiber volume fraction. When the spacing between transverse reinforcements decreases from 150 to 100 mm, the ultimate torque increases by 19.9%. When the spacing between transverse reinforcements decreases from 100 to 60 mm, the ultimate torque increases by 17.0%. In these beams, the fibers’ compressive strength and volume fraction were kept constant at 45.2 MPa and 0.75, respectively. Doi: 10.28991/CEJ-2022-08-01-07 Full Text: PDF
Experimental Study of Cold-Formed Steel Bridge Girder in Various Shapes Under Static Loads Allami, Ali; Hussain, Haleem K.; Majeed, Fareed H.
Civil Engineering Journal Vol. 12 No. 3 (2026): March
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-03-021

Abstract

To facilitate accelerated bridge construction and reduce the cost of bridge design and construction, a cold-formed steel composite bridge girder has been suggested recently as an economical alternative. The new technology for the composite bridge girder includes a cold-formed steel plate and either a precast or cast-in-place reinforced concrete (RC) slab. Previous research on cold-formed steel concrete composite girders has introduced two new shapes for short-span bridge girders: a cold-formed steel tub girder and a folded plate girder system. No study has been conducted on the impact of shape on the static structural behavior of cold-formed composite girders for short-span bridges. This paper investigated the behavior of the cold-formed steel composite girders with different shapes in terms of ductility, stiffness, the ultimate failure load, crack resistance, and interfacial slip. Four shapes were carried out in this research: tub, open-box, and double C with and without lips. Six simply supported girder specimens were designed, fabricated, and subjected to static load tests. The results showed that the cold-formed steel double C lipped girder increased the ultimate load by 12.12% compared to the cold-formed steel tub girder. Additionally, the initial stiffness of the cold-formed steel double C girder increased by 21% compared to the cold-formed steel tub girder. The open-box shape specimen can effectively improve the cracking resistance of cold-formed steel composite girders compared to the cold-formed steel tub girders.
A REVIEW OF COMPOSITE BRIDGE GIRDER OF COLD-FORMED STEEL PLATE AND RC DECK Allami, Ali; Majeed, Fareed H.; Hussain, Haleem K.
International Journal Multidisciplinary (IJMI) Vol. 3 No. 2 (2026): International Journal Multidisciplinary (IJMI)
Publisher : Antis-Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61796/ijmi.v3i2.483

Abstract

Objective: This paper presents a review of earlier studies on the behavior of composite bridge girders made up of reinforced concrete (RC) decks and cold-formed steel plates. The objective is to examine the behavior of cold-formed steel composite girders under different load conditions and identify gaps in the research, especially concerning various cold-formed steel sections. Method: The behavior of cold-formed steel bridge girders was classified based on the loads applied and the shape of the cold-formed steel plate. Experimental and analytical studies have been conducted on cold-formed steel tub bridge girders and cold-formed steel tub bridge systems. Results: The study indicates that research on cold-formed steel bridge girders has focused mainly on steel tub sections, with limited research on other shapes, such as the double-C steel section. The studies considered different loads applied to the composite bridge girders, but there is a gap in understanding the behavior of various shapes of cold-formed steel girders. Novelty: The novelty of this paper lies in its identification of the lack of research on the double-C steel section of cold-formed composite girders and the need for additional studies. Future research should focus on the ductility, ultimate capacity under static and fatigue loads, and the interaction degree effect on the behavior of cold-formed composite girders. This will help fully comprehend the behavior of different cold-formed composite girder sections.
Co-Authors Ahmed, Mazin Abdulimam Allami, Ali Majeed, Fareed H. Zewair, Mustafa Shareef