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All Journal Journal of Global Engineering Research & Science (J-GERS)
Lintang Dian Artanti
Department of Civil Engineering, Faculty of engineering and computer science, Jakarta Global University, 16412, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Environmental Science

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Dynamic Interaction of Bridge Spans and Piers as a Tuned System for Seismic Load Reduction Ziyovuddin Rahimjonov; Fakhriddin Zokirov; Lintang Dian Artanti
Journal of Global Engineering Research and Science Vol. 5 No. 1 (2026): Vol. 5 No. 1 (June 2026): Journal of Global Engineering Research & Science (J-G
Publisher : Jakarta Global University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/j-gers.v5i1.200

Abstract

Bridges located in seismic regions are subjected to significant dynamic loads that may cause considerable forces in bridge piers and foundations. Traditional seismic design methods usually consider the span structure as a rigid mass transferring inertial forces to the supports. However, this approach does not account for the potential dynamic interaction between the span and the supporting structure. This study proposes a method for reducing seismic forces in bridge piers by using the span structure as a tuned dynamic system. In the proposed approach, the bridge span is considered as a dynamic vibration absorber interacting with the pier. A mathematical model based on a two-degree-of-freedom system is developed to describe the dynamic behavior of the bridge–pier system under seismic excitation. Parametric analysis is carried out to determine the optimal stiffness and damping parameters that minimize seismic forces in the pier. The results show that appropriate tuning of the span structure significantly reduces dynamic responses. In particular, the bending moment in the bridge pier can be reduced by up to 2.3 times compared with traditional seismic design approaches. The proposed method can be applied in seismic regions for improving the seismic performance and reliability of bridge structures.
Analysis of the Effect of Aggregate Gradation Size (0.2 – 2cm) on the Compressive Strength of Porous Concrete for Parking Applications Dilla Natasya Amelia; Dedy Rutama; Lintang Dian Artanti
Journal of Global Engineering Research and Science Vol. 4 No. 1 (2025): Vol. 4 No. 1 (June 2025): Journal of Global Engineering Research & Science (J-G
Publisher : Jakarta Global University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/j-gers.v4i1.118

Abstract

Many parking lots are not well designed, so they often experience waterlogging due to rain, which disrupts user comfort and causes damage to infrastructure. Porous concrete is one of the new innovations being developed. This study uses various aggregate gradations to evaluate the mechanical characteristics and physical properties of porous concrete with a design compressive strength of K-150 kg/cm2. This study aims to analyze the effect of aggregate gradation with a size of 0.2 cm to 1.2 cm on the compressive strength and porosity of porous concrete used in parking lot applications. The research method applies an experimental approach in the laboratory, with compressive strength testing referring to ASTM C39 and concrete porosity referring to ASTM C192-2012. The results show that aggregate gradation of 0.2 cm - 0.7 cm has a greater average compressive strength at the age of 28 days, namely 90.19 kg/cm2 but the porosity value is smaller, namely 24.29%. Aggregates with an aggregate gradation of 0.7 cm - 1.2 cm showed an average compressive strength value of 85.06 kg/cm2 and a porosity value of 28.7% while aggregate gradations with a size of 1cm - 2 cm showed a small average compressive strength value at the age of 28 days of 80.01 kg/cm2 but the porosity value obtained was higher at 30.5%. In this test, the compressive strength at the age of 28 days with an aggregate gradation of porous concrete of 0.2 cm - 0.7 cm still meets the SNI 03-0691-2022 standard for Class B qualification (parking lot)
Co-Authors Dedy Rutama Dilla Natasya Amelia Fakhriddin Zokirov Ziyovuddin Rahimjonov