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All Journal Journal of Engineering, Electrical and Informatics
Dody M.J. Sumajouw
Universitas Sam Ratulangi
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering

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Flexural Behavior Analysis of Geopolymer Reinforced Concrete Beams Using Finite Element Method Reynaldo Jeremy Sela; Dody M.J. Sumajouw; Mieke R.I.A.J Mondoringin
Journal of Engineering, Electrical and Informatics Vol. 4 No. 2 (2024): Juni: Journal of Engineering, Electrical and Informatics
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jeei.v5i2.4864

Abstract

This study aims to analyze and validate the flexural behavior of reinforced geopolymer concrete beams compared to conventional concrete using a numerical approach through the Finite Element Method (FEM) with ANSYS software. The simulations were based on geometric and material parameters from previous experimental studies, including those by Abraham et al. (2013), Dattatreya et al. (2011), and Ojha et al. (2022). The simulation results indicate that the load–deflection behavior, crack distribution patterns, and flexural capacity of geopolymer concrete beams are comparable to those of conventional concrete beams. Validation against experimental data shows small deviations in both ultimate load and maximum deflection, confirming the accuracy of the numerical model. Crack propagation in the flexural zone also demonstrates similar characteristics, suggesting that geopolymer concrete is a viable alternative structural material. This research contributes to the development of numerical modeling to support the implementation of geopolymer concrete in sustainable construction.
The Influence of Vertical Distance of Tie Beams in Building Substructures on Structural Response and Soil Behavior Rico Daniel Sumendap; Dody M.J. Sumajouw; Fabian J. Manoppo
Journal of Engineering, Electrical and Informatics Vol. 4 No. 2 (2024): Juni: Journal of Engineering, Electrical and Informatics
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jeei.v5i2.4875

Abstract

Indonesia, located in a high seismic zone, requires building structures to be designed with strong earthquake resilience. Tie beams are commonly used in pile foundation systems to improve substructure stability, yet their vertical positioning is rarely analyzed in relation to overall building performance. This study investigates the influence of vertical distance of tie beams in reinforced concrete substructures on both structural response and soil behavior under seismic loading. A seven-story educational building was modeled using SAP2000 with varying tie beam elevations (−1.30 m to 0.00 m). Structural parameters analyzed included inter-story displacement, drift ratio, and stability index (θ), while subsoil behavior was evaluated through soil displacement in X, Y, and Z directions. The results showed that placing the tie beam at 0.00 m significantly reduced structural drift and improved overall stability. Meanwhile, the smallest soil displacement in the X and Z directions occurred when tie beams were placed at −1.00 m. However, in the Y direction, tie beams at 0.00 m produced slightly higher soil movement than configurations without tie beams. These findings highlight the importance of vertical tie beam placement in optimizing both structural and geotechnical performance in seismic design.
Co-Authors Fabian J. Manoppo Mieke R.I.A.J Mondoringin Reynaldo Jeremy Sela Rico Daniel Sumendap