Analisis Kapasitas Lentur Balok Baja Dengan Variasi Panjang Bentang
DOI:
https://doi.org/10.25077/jbkd.4.2.104-114.2026Keywords:
steel beam, beam length, flexural capacity, lateral torsional buckling, AISC 360Abstract
This study aims to analyze the effect of length on the flexural capacity of WF section steel beams. Length variations are explained in terms of the unconfined length limits specified in AISC 360: short, intermediate, and long beams. The method used is numerical analysis, calculating the nominal flexural capacity (Mn) at various beam lengths using a 150×75 WF section. The results show that the maximum flexural capacity occurs at short beams, then decreases at intermediate beams due to inelastic lateral-torsional buckling, and decreases significantly at long beams due to elastic buckling. The ratio of the ultimate load capacity to the analytical load capacity at short beams is 0.83 and 1.12, intermediate beams 1.27 and 1.14, and long beams 1.44 and 1.7. In general, the theoretical and numerical capacities exhibit the same trend: a decrease in flexural capacity with increasing beam length.
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References
AISC. (2022). Specification for Structural Steel Buildings Supersedes the Specification for Structural Steel Buildings.
Galishnikova, V. V, & Gebre, T. H. (2019). A comparative study of beam design curves against lateral torsional buckling using AISC, EC and SP. Structural Mechanics of Engineering Constructions and Buildings, 15(1), 25–32. https://doi.org/10.22363/1815-5235-2019-15-1-25-32
Kolakowski, Z., & Jankowski, J. (2018). Interactive buckling of steel C-beams with different lengths – From short to long beams. Thin-Walled Structures, 125, 203–210. https://doi.org/10.1016/j.tws.2018.01.027
Li, Y., Lee, C.-C., & Cai, Y. (2023). Recent Research Advances in High-Performance Steel Tubular Members: Material Properties, Stub Columns, and Beams. Buildings, 13(11), 2713. https://doi.org/10.3390/buildings13112713
Mascolo, I., Modano, M., Fiorillo, A., Fulgione, M., Pasquino, V., & Fraternali, F. (2018). Experimental and Numerical Study on the Lateral-Torsional Buckling of Steel C-Beams with Variable Cross-Section. Metals, 8(11), 941. https://doi.org/10.3390/met8110941
Medland, I. C. (1980). Buckling of interbraced beam systems. Engineering Structures, 2(2), 90–96. https://doi.org/10.1016/0141-0296(80)90035-8
Mohammadi, E., Hosseini, S. S., & Rohanimanesh, M. S. (2016). Elastic lateral-torsional buckling strength and torsional bracing stiffness requirement for monosymmetric I-beams. Thin-Walled Structures, 104, 116–125. https://doi.org/10.1016/j.tws.2016.03.003
Ochshorn, J. (2010). Beams. Dalam Structural Elements for Architects and Builders (hlm. 129–191). Elsevier. https://doi.org/10.1016/B978-1-85617-771-9.00008-8
Ozbasaran, H., Aydin, R., & Dogan, M. (2015). An alternative design procedure for lateral–torsional buckling of cantilever I-beams. Thin-Walled Structures, 90, 235–242. https://doi.org/10.1016/j.tws.2015.01.021
Yoo, C. H., & Lee, S. C. (2011). Lateral-Torsional Buckling. Dalam Stability of Structures (hlm. 327–371). Elsevier. https://doi.org/10.1016/B978-0-12-385122-2.10007-7
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