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Abstract Based on the Biot¢s dynamic equation and the theory of elastic plate，the dynamic responses of an infinite plate on a layered poro-elastic subsoils subjected to moving loads is studied by the transmission and reflection matrices(TRM) method. Numerical results of bending moment and shear force for the plate are obtained by performing inverse Fourier transformation in the time-space domain. Moreover，the vibration of subsoil due to the moving load is also retrieved. The present methodology is validated by comparing the solutions with some monitoring results. Two examples and the corresponding analysis are presented. Based on the analysis，it can be seen that the occurrence of a softer middle layer inside the layered subsoil will enhance the internal force of beam and the pore pressure considerably. It also indicates that the dynamic response becomes more oscillatory and concentrated to the region of load with increasing the moving load velocity.
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Received: 07 September 2006
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