Dynamic Response of Rigid Pavement under Moving Multi-Load

The dynamic response of rigid pavement under moving multi-load is investigated. Solutions of dynamic stress and deflection of infinite plate on viscoelastic foundation subjected to moving load are obtained by means of Fourier transform. Four load patterns are discussed respectively, including single-wheel load, single-axle load, tandem-axle load and whole-vehicle load. The numerical calculations are carried out by using Fast Fourier Transform (FFT). In the numerical example, the dynamic responses obtained with the four load patterns are compared. It is found that tandem-axle load is the major cause for the maximum response of the plate. In the end, the effects of load traveling velocity, thickness and elastic modulus of the plate on the distribution of the deflection and the stress are studied.