BEHAVIOR OF PLATE ON VISCOELASTIC FOUNDATION UNDER MOVING HARMONIC LOADS

Abstract eng:
The dynamic stress and displacement responses of a plate of infinite extent on a viscoelastic foundation subjected to moving multiple harmonic loads with a constant advance velocity have been investigated. Formulations have been developed in the transformed field domain using a double Fourier transform in space and moving space. For a numerical example, a concrete pavement system has been selected as a model of the plate on viscoelastic foundation. The loads applied by moving vehicles have been modeled using moving dual-wheel tandem-axle loads. The effects of viscous damping, load velocity, load frequency, and phase between front- and rear-axle loads on the maximum deflection and stress have been investigated for three different cases of: (1) when the load frequency is zero; (2) when the phase between the loads is zero; and (3) when there are load frequency and phase in the moving multiple harmonic loads.

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