Road Pavements’ Dynamic Stiffness Measurements by Means of Impact Hammer in a Non-Resonant Configuration

21 Pages Posted: 13 Mar 2023

See all articles by Matteo Bolognese

Matteo Bolognese

Environmental Protection Agency of the Tuscany Region

Erica Greco

affiliation not provided to SSRN

Francesco Bianco

affiliation not provided to SSRN

Gaetano Licitra

Environmental Protection Agency of the Tuscany Region

Abstract

The different sources of noise in a vehicle have long been known and include noise from the engine and other mechanical parts, aerodynamic noise, and rolling noise.In particular, the latter affects the interaction between the tire and the road surface, so is known also as Tire-Road Noise (TRN). One of the parameters influencing TRN is pavement stiffness.The empirical measurement of pavement stiffness, and in particular its frequency spectrum (dynamic stiffness) is not obvious to determine, and only in the last decade have studies emerged about this subject. In these works, two different instrumental chains are employed: the impact hammer one and the dynamic exciter (\textit{shaker}) one, which has established itself over time as a reference. The objective of this work is to develop a system for the dynamic stiffness measurements of road pavements using the impact hammer capable to produce a similar performance to the shaker while minimizing costs. During the work, a measurement aid device named Test Automation Device (TAD) was designed and implemented to increase the quality of measurements. In line with the practical execution of the measurement also the analysis and the representation of the result were optimized to obtain results that adhere to the stiffness model proposed in the literature. In the present paper, the TAD, the measurement optimization work, the data analysis performed, and the proposed representation method will be described. Finally, we will present the results obtained and possible future perspectives.

Keywords: mechanical impedance, Crumb rubber, low-cost, calibration

Suggested Citation

Bolognese, Matteo and Greco, Erica and Bianco, Francesco and Licitra, Gaetano, Road Pavements’ Dynamic Stiffness Measurements by Means of Impact Hammer in a Non-Resonant Configuration. Available at SSRN: https://ssrn.com/abstract=4387378 or http://dx.doi.org/10.2139/ssrn.4387378

Matteo Bolognese

Environmental Protection Agency of the Tuscany Region ( email )

Erica Greco

affiliation not provided to SSRN ( email )

No Address Available

Francesco Bianco

affiliation not provided to SSRN ( email )

No Address Available

Gaetano Licitra (Contact Author)

Environmental Protection Agency of the Tuscany Region ( email )

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