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<p>Aircraft pavements, particularly runways and taxiways, are essential for airport operations. The main aim of this study is to create a 3D simulation using the Finite Element Method for a Jointed Reinforced Concrete Pavement (JRCP) airport structure and to examine the influence of various modal parameters on its modal properties, specifically its natural frequencies and corresponding mode shapes across different vibration types related to multiple degrees of freedom. The validity of the simulation was verified using mesh convergence and mass participation factor analysis, compared with results from previous experimental, analytical, and numerical investigations. The validated numerical model is employed to examine the impact of the pavement slab’s concrete grade, subgrade modulus, and subbase on the pavement’s modal efficiency. This will improve runway design by precisely controlling vibration frequencies through the dispersion of mass and rigidity, minimizing resonance and ensuring structural integrity. The frequency value increased with higher modes, displaying intricate, deformed shapes that encompassed a blend of flexure, translation, shear, and torsional degrees of freedom. Its rigidity and mass primarily determine the pavement framework’s modal characteristics; the aspect that most significantly impacts the structure alters the fundamental frequency and other modal frequencies accordingly. The cumulative mass participation factor for this study indicates that the JRCP system accounts for 90% of the total mass across the initial 15 stages. The increase in concrete grade led to a proportional increase in the structure’s inherent frequency. Enhancing the elastic modulus of the sub-base and subgrade increased the intrinsic frequency. The investigation’s outcome is crucial for airfield pavement engineers, providing significant insights into a JRCP’s modal characteristics. The outcomes of this research will aid pavement specialists in improving their understanding of the distinct properties of JRCP under aircraft loading, temperature variations, and seismic environments.</p>

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Simulation of modal response for a joint reinforcement cement concrete aircraft pavement utilizing a finite element method

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • Avishek Singh Parihar,
  • K. Nallasivam

摘要

Aircraft pavements, particularly runways and taxiways, are essential for airport operations. The main aim of this study is to create a 3D simulation using the Finite Element Method for a Jointed Reinforced Concrete Pavement (JRCP) airport structure and to examine the influence of various modal parameters on its modal properties, specifically its natural frequencies and corresponding mode shapes across different vibration types related to multiple degrees of freedom. The validity of the simulation was verified using mesh convergence and mass participation factor analysis, compared with results from previous experimental, analytical, and numerical investigations. The validated numerical model is employed to examine the impact of the pavement slab’s concrete grade, subgrade modulus, and subbase on the pavement’s modal efficiency. This will improve runway design by precisely controlling vibration frequencies through the dispersion of mass and rigidity, minimizing resonance and ensuring structural integrity. The frequency value increased with higher modes, displaying intricate, deformed shapes that encompassed a blend of flexure, translation, shear, and torsional degrees of freedom. Its rigidity and mass primarily determine the pavement framework’s modal characteristics; the aspect that most significantly impacts the structure alters the fundamental frequency and other modal frequencies accordingly. The cumulative mass participation factor for this study indicates that the JRCP system accounts for 90% of the total mass across the initial 15 stages. The increase in concrete grade led to a proportional increase in the structure’s inherent frequency. Enhancing the elastic modulus of the sub-base and subgrade increased the intrinsic frequency. The investigation’s outcome is crucial for airfield pavement engineers, providing significant insights into a JRCP’s modal characteristics. The outcomes of this research will aid pavement specialists in improving their understanding of the distinct properties of JRCP under aircraft loading, temperature variations, and seismic environments.