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<p>The accelerated degradation of rigid highway pavements under Over-Dimension Overload (ODOL) freight traffic necessitates advanced mechanistic evaluation beyond traditional static Winkler design codes. This study develops a rigorously validated 2D explicit Finite Difference Method (FDM) to simulate the dynamic non-local response of a concrete slab subjected to moving 8-axle heavy vehicle loads. The pavement-subgrade interaction is formulated using a two-parameter Pasternak foundation to account for soil shear continuity, evaluated under conservative Free Edge boundary conditions. Spatial contour and time-history numerical outputs reveal that closely spaced multi-axle configurations (e.g., quad-trailers) induce severe dynamic superposition. This continuous loading prevents the slab's elastic rebound, creating a sustained tensile strain basin that significantly accelerates fatigue potential compared to isolated axles. Furthermore, a comprehensive parametric sweep coupling vehicle velocity and foundation stiffness demonstrates that subgrade shear (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({{\varvec{G}}}_{{\varvec{p}}}\)</EquationSource> </InlineEquation>) acts as a critical mechanistic mitigation driver. A competent Pasternak foundation reduces peak static deflections by approximately 35% compared to the Winkler baseline and induces a critical "resonance shift." While Dynamic Amplification Factors (DAF) can reach 1.55 near 60&#xa0;km/h on weak subgrades, increasing shear stiffness shifts this destructive resonance velocity well beyond standard highway operational limits (&gt; 140&#xa0;km/h). Ultimately, this computational framework proves that mitigating structural vulnerability requires prioritizing adequate axle-spacing and foundation shear stiffness alongside traditional gross vehicle weight limits.</p>

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Dynamic amplification and resonance shift in rigid pavements subjected to multi-axle heavy vehicles: a 2D Pasternak foundation model

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月13日

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  • Haryo K. Buwono,
  • Heri Khoeri,
  • Deby Puspitaningrum

摘要

The accelerated degradation of rigid highway pavements under Over-Dimension Overload (ODOL) freight traffic necessitates advanced mechanistic evaluation beyond traditional static Winkler design codes. This study develops a rigorously validated 2D explicit Finite Difference Method (FDM) to simulate the dynamic non-local response of a concrete slab subjected to moving 8-axle heavy vehicle loads. The pavement-subgrade interaction is formulated using a two-parameter Pasternak foundation to account for soil shear continuity, evaluated under conservative Free Edge boundary conditions. Spatial contour and time-history numerical outputs reveal that closely spaced multi-axle configurations (e.g., quad-trailers) induce severe dynamic superposition. This continuous loading prevents the slab's elastic rebound, creating a sustained tensile strain basin that significantly accelerates fatigue potential compared to isolated axles. Furthermore, a comprehensive parametric sweep coupling vehicle velocity and foundation stiffness demonstrates that subgrade shear ( \({{\varvec{G}}}_{{\varvec{p}}}\) ) acts as a critical mechanistic mitigation driver. A competent Pasternak foundation reduces peak static deflections by approximately 35% compared to the Winkler baseline and induces a critical "resonance shift." While Dynamic Amplification Factors (DAF) can reach 1.55 near 60 km/h on weak subgrades, increasing shear stiffness shifts this destructive resonance velocity well beyond standard highway operational limits (> 140 km/h). Ultimately, this computational framework proves that mitigating structural vulnerability requires prioritizing adequate axle-spacing and foundation shear stiffness alongside traditional gross vehicle weight limits.