Effects of the dynamic vehicle-road interaction on the pavement vibration due to road traffic

A new model is developed for predicting pavement vibration due to the dynamic vehicle-road interaction. This model incorporates vehicles, an uneven pavement, a base layer and a subgrade, and uses the moving axle loads and the geometric unevenness as its inputs. Using the Fourier transform, the dynamic equilibrium equations of the coupling system are then solved in the frequency-wavenumber domain. The time domain responses are evaluated by the fast inverse Fourier transform. The effects of the moving vehicle speed, the wavelength and magnitude of pavement unevenness and the pavement properties on the dynamic displacement response are investigated systematically. Computed results show that two peaks of the vertical response can be observed with increase of the uneven wavelength and the vehicle speed because of resonance of the coupling system. Therefore, it is important to control the pavement unevenness and vehicle speed to avoid resonance in the engineering practice.

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