Authors

Ojo Kurdi

Faculty of Engineering, Department of Mechanical Engineering, Diponegoro University, Indonesia

Berkah Fajar TK

Faculty of Engineering, Department of Mechanical Engineering, Diponegoro University, Indonesia

Dwi Basuki Wibowo

Faculty of Engineering, Department of Mechanical Engineering, Diponegoro University, Indonesia

Khoiri Rozi

Faculty of Engineering, Department of Mechanical Engineering, Diponegoro University, Indonesia

Zaki Ahmad Fitriawan

Faculty of Engineering, Department of Mechanical Engineering, Diponegoro University, Indonesia

Abstract

Radial gates are critical hydraulic structures used in spillway systems to regulate water discharge under various operational conditions. The radial arm functions as the primary compression member responsible for transferring hydrostatic loads from the gate leaf toward the trunnion support. Due to its slender structural configuration, the radial arm is vulnerable to instability failure in the form of buckling. This study investigates the buckling behavior and structural response of the Karangnongko Dam radial gate arm under hydrostatic loading using a one-way Fluid-Structure Interaction (FSI) method combined with Finite Element Analysis (FEA). Computational Fluid Dynamics (CFD) simulation was conducted to obtain the hydrostatic pressure distribution acting on the gate surface, which was subsequently transferred into Static Structural and Eigenvalue Buckling analyses in ANSYS Workbench. The structural material used in the simulation was SM490B steel based on JIS G3106 standard. The CFD simulation produced a maximum hydrostatic pressure of 105,591.2 Pa. Structural analysis resulted in a maximum von Mises stress of 106.56 MPa and a maximum total deformation of 14.899 mm. The Eigenvalue Buckling analysis generated a critical load multiplier of 18.153, indicating that the structure maintains a high resistance against buckling instability under maximum operational loading conditions. The calculated safety factor reached 3.05, exceeding the minimum requirement specified by USACE EM 1110-2-2702. The results demonstrate that the radial gate arm possesses sufficient stiffness and structural stability to safely withstand hydrostatic loading during operation.

Keywords

Finite Element Analysis Radial Gate Buckling Hydrostatic Loading One-Way FSI SM490B Steel ANSYS.

Citation of this Article

Ojo Kurdi, Berkah Fajar TK, Dwi Basuki Wibowo, Khoiri Rozi, & Zaki Ahmad Fitriawan. (2026). Finite Element Analysis of Radial Gate Arm Buckling under Hydrostatic Loading Using One-Way FSI. Current Journal of Engineering and Science Research. 3(5), 10-16. Article DOI: https://doi.org/10.47001/CJESR/2026.305002

Licence Copyright (c) 2026 Current Journal of Engineering and Science Research. This work is licensed under a Creative Commons Attribution Non Commercial 4.0 International Licence.

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