Boundary Effect of Laminar Model Box for Shaking Table Tests on Geotechnical Centrifuge System

Numerical study is carried out for the solution to problems of boundary effect of laminar model box for dynamic centrifuge model test.Seismic responses of single layer soil and layered soil in laminar model box are simulated respectively and the numerical solutions are compared with the exact solutions.Finally boundary effect of laminar model box is analyzed combining with the numerical simulation results and the test results. Both show that the peak accelerations,the shapes of acceleration time history and the Fourier amplitude spectra are in good agreement.The results indicate the laminar model box avoids the disadvantages of the boundary effect and can simulate the real seismic response of free field well.So the paper verifies the validity of the simulation design of soil boundary effect by laminar model box,which provides a basis for dynamic centrifuge model test for soil-underground structure interaction system.