Studies On The Dynamic Response Of The Subgrade And Pavement Under A Moving Load

It is well known that the dynamic interaction of the subgrade and pavement is significant for the computation and design under the action of moving load. However, the relevant theoretical study lags far behind the engineering practice. To understand and master the influence of moving load on the interaction of subgrade and pavement so as to provide some technical supports for the design of the pavement and the practice engineering, in this dissertation, the dynamic response of the subgrade and pavement under the moving load are systematically studied on the basis of different foundation model and pavement computational theory. The main original work includes:1. Considering the nonlinear viscoelastic and viscoelastic of Winkler foundation, the dynamic response of the pavement due to a harmonic moving load acted on the surface of the pavement by using the triangular series and the Fourier transform technique. The displacement response to multiple loads are also obtained using the superposition method.2. Utilizing the theory of laminated plate, triangular series and Fourier transform technique, the dynamic response of the thick pavement simply supported on Winkler foundation is analyzed.3. The three dimensional vibration and transmission, due to a harmonic moving load over the surface of the pavement simply supported on elastic foundation, is investigated by using the triangular series and the Fourier transform technique. The results of displacement response, with and without pavement, are analyzed.4. The dynamic interaction of subgrade and pavement is investigated considering the porous elastic behaviors of the foundation. The triangular series and Fourier transform technique is also used in the section. Numerical results are compared with those of the viscoelastic case in part three.