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All Journal International Journal of Civil Engineering and Infrastructure (IJCEI)
Budiman Budiman
Muhammadiyah Jakarta University
Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Engineering Environmental Science Transportation

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NUMERICAL INVESTIGATION ON BEHAVIOUR OF COLD-FORMED STEEL UNLIPPED CHANNEL SUBJECT TO COMBINED COMPRESSION AND BENDING Budiman Budiman
International Journal of Civil Engineering and Infrastructure Vol. 3 No. 1 (2023): IJCEI Volume 3 No. 1
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.1.1.86-94

Abstract

Cold-formed steel has become an alternative construction material solution that has many advantages compared to other construction materials including hot-rolled steel. The need for a construction material that can be manufactured easily and has a large strength-to-dimension ratio has been able to be met by cold-formed steel. In this study, the cross-section of unlipped channel cold-formed steel is subjected to a combination of compression and bending loads. Numerical analysis was carried out to see the behavior and capacity of the cold-formed steel cross-section using the effective width approach using SNI 7971-2013 or AS/NZS 4600 and using numerical analysis using the finite element method with ABAQUS. A comparison of the results of the two approaches was conducted to see whether the codes were able to give accurate results in providing cross-sectional capacity values for cold-formed steel. Numerical analysis and section capacity estimation will be carried out based on existing research in the literature.
NUMERICAL INVESTIGATION OF COLD-FORMED STEEL HOLLOW STRUCTURAL SECTIONS DUE TO COMBINED AXIAL COMPRESSION AND BENDING LOADS Budiman Budiman; Mohammad Imamuddin; Basit Al Hanif; Hendras Duwi Handoyo
International Journal of Civil Engineering and Infrastructure Vol. 3 No. 2 (2023): IJCEI Volume 3 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.3.2.69-77

Abstract

old-formed steel has emerged as a prominent material in modern construction due to its excellent structural performance, cost-effectiveness, and sustainability. Hollow structural sections made of cold-formed steel have garnered significant attention due to their favourable strength-to-weight ratios and versatility in construction applications. In this research, the cross-section of cold-formed steel hollow structural sections will be analysed as a structure that receives a combination of compressive and bending loads. Numerical analysis was carried out using the finite element method with the help of ABAQUS software to obtain the buckling behaviour and cross-sectional capacity. The cold rolled steel regulations in SNI 79712013 or AS/NZS 4600 will be compared with numerical results to see the level of performance of the code in the case of hollow structural sections. Numerical testing and cross-sectional capacity calculations refer to existing references in the literature.
STRUCTURAL BEHAVIOR AND PERFORMANCE OF HOT-ROLLED WIDE FLANGE CASTELLATED STEEL BEAMS: INSIGHTS FROM FINITE ELEMENT ANALYSIS Cipto Wahyu; budiman budiman; Basit Al Hanif
International Journal of Civil Engineering and Infrastructure Vol. 5 No. 2 (2025): IJCEI Volume 5 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.5.2.58-67

Abstract

Castellated steel beams, produced by cutting solid cross-sections, enhance the moment of inertia without increasing self-weight but remain vulnerable to lateral–torsional buckling (LTB) and Vierendeel action. This study investigates the nonlinear behavior of IWF 200×100×5.5×9 beams with spans of 8–10 meters using ABAQUS and the modified Riks algorithm. Results reveal that LTB is the governing failure mode, consistent with AISC 360 predictions. Circular web openings provide 2–7% higher ultimate capacity at short spans, though their performance aligns with hexagonal openings for longer spans. Hexagonal openings, however, reduce deflections by 15–20%, indicating improved serviceability. Strengthening strategies are proposed, including stiffeners, lateral bracing, partial closure of web openings near supports, and optimization of opening ratios between 50–70%, achieving an effective balance between strength and deflection control. The findings highlight the critical influence of opening geometry and span on structural performance and provide actionable guidance for the design and optimization of castellated steel beams. This work advances understanding of perforated steel behavior under bending and offers practical solutions for enhancing both ultimate capacity and serviceability in engineering applications.Keywords: Castellated steel beams, nonlinear analysis, lateral–torsional buckling, ABAQUS, structural optimization
Co-Authors Basit Al Hanif Cipto Wahyu Hendras Duwi Handoyo Mohammad Imamuddin