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All Journal Jurnal Pensil : Pendidikan Teknik Sipil Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil
Sutedjo Krisnadi
Program Studi Teknik Sipil, Fakultas Teknik, Universitas Langlangbuana, Jalan Karapitan 116, Bandung, Jawa Barat, 40261, Indonesia
Civil Engineering, Building, Construction & Architecture Education Engineering Transportation Other

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Studi Perbandingan Kekuatan Profil IWF, Hexagonal Beam dan Octagonal Beam dengan Perhitungan Manual dan Metode Elemen Hingga: Comparative Study of IWF Profile Strength, Hexagonal Beam and Octagonal Beam with Manual Calculations and Finite Element Method Zarmihan, Rezaldi Pramanda; Pratiwi, Vitta; Krisnadi, Sutedjo
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 11 No. 2 (2022): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v11i2.165

Abstract

A castellated beam is formed from the IWF body profile cutting pattern, and the cuts are then adjusted between the pieces and then welded to put them back together. The advantage of modifying the IWF profile into a castellated beam is that it can increase the moment of inertia of the section (Ix), and this increase affects the bending capacity of the castellated beam profile and the ability of the profile to withstand loads. However, these profile modifications have limitations that are used to minimize the occurrence of extreme failures, and one of the limitations is that the modified profile may not exceed 50% of the height increase from the initial profile height. In this study, the profile capabilities of IWF, Hexagonal Beam, and Octagonal Beam will be compared with a total of 3 models of centralized loads that can be carried. In this study, two methods will be used, namely manual calculation and finite element method. From the results of the analysis that has been carried out with both methods, it can be seen that the effect of modifying the IWF profile into hexagonal beams and octagonal beams can increase the load capacity of the profiles. However, the highest profile capability increase occurred in model 1 or IWF profile 150x75x5x7, which was modified to model 2 or hexagonal beam 220x75x5x7. The increase in the profile was 34.83% for manual method calculations and finite element method calculations, an increase of 12.15 %. The highest comparison between the manual calculation method and the finite element method occurs in the hexagonal profile beam measuring 240x75x5x7 with a difference of 21.39%. Based on the research that has been done, it can be concluded from the three profiles that it is better if the profile used is model 2.
CORRELATION OF EFFECTIVE INERTIA OF CASTELLATED BEAMS WITH SPAN-TO-DEPTH RATIO Sutedjo Krisnadi; Ignatius Sudarsono; Rully Savitri Nurvita; Nadiv Raka Pradifa
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.66798

Abstract

Material efficiency in structural systems can be enhanced through cross-sectional optimization of structural elements, one of which is the use of castellated steel beams. A castellated beam has an increased section depth without adding material volume from the original beam. Although several studies have investigated the flexural performance of castellated beams, analytical studies on the moment of inertia, particularly those considering the effect of shear deformation, remain limited. This study compares the net moment of inertia (Inett) based on the AISC Design Guide 31 with the effective moment of inertia (Ieff) obtained from Finite Element Analysis (FEA). Beam models were developed with total depths (dg) ranging from 450 mm to 1350 mm and span lengths (L) from 6000 mm to 18000 mm. The Ieff values were derived from the midspan deflection under uniformly distributed loading and correlated with the L/dg ratio. Results show that Ieff increases with the increasing L/dg and tends to converge. Empirical correlation between L/dg and Inett/Ieff was obtained with a coefficient of determination of R2 = 0.9412. When L/dg ≥ 18, the Inett/Ieff ratio is less than 1.1, indicating that the difference between Inett and Ieff is below 10%. Therefore, the Inett can be safely used for structural design. The findings provide a practical guideline for estimating the effective flexural stiffness of castellated beams and contribute to the development of analytical and numerical approaches for their structural design.
Co-Authors Ignatius Sudarsono Nadiv Raka Pradifa Pratiwi, Vitta Rully Savitri Nurvita Zarmihan, Rezaldi Pramanda