Numerical analysis and conversion of dynamic and static deflection of asphalt pavement under FWD loading

Article Materials Science, Characterization & Testing

Modulus Back-Calculation of Four-Layer System Based on the Characteristic Parameters of Deflection Basin

Xu Liu et al.

Summary: This paper proposes a new back-calculation method for a four-layer structure based on a linear elastic layered mechanical system, by analyzing the empirical relationship between the geometric characteristics of the measured deflection basin and the corresponding moduli of structural layers. The feasibility and reliability of this method are evaluated using FWD data from representative structures in the RIOHTrack test road.

JOURNAL OF TESTING AND EVALUATION (2022)

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Article Construction & Building Technology

Assessment of asphalt pavement overall performance condition using functional indexes and FWD deflection basin parameters

Manzhe Xiao et al.

Summary: This study proposes an overall pavement evaluation framework based on functional and structural performance indexes and applies it to the Hubei section of the Beijing-Hong Kong-Macao Expressway. The results show that the method can accurately evaluate the overall performance of the pavement and determine the degree of influence of various indicators on the overall service status of the pavement.

CONSTRUCTION AND BUILDING MATERIALS (2022)

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Article Construction & Building Technology

Evaluation of different modulus input on the mechanical responses of asphalt pavement based on field measurements

Guoping Qian et al.

Summary: The study evaluated the deviations between field mechanical responses and calculated responses, recommending the use of static flexural modulus for asphalt layer and dynamic flexural modulus for CSG layer as modulus input in FEM dynamic strain calculation. For static strain calculation, dynamic compressive resilience modulus for asphalt layer and static flexural modulus for CSG layer are recommended as modulus input. Additionally, for pavement deflection analysis, dynamic flexural modulus or compressive modulus in static four-point bending test should be selected as modulus input.

CONSTRUCTION AND BUILDING MATERIALS (2021)

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Article Engineering, Civil