Design of shaking table for earthquake simulation

To deeply understand the performance of the self-assembled shaking table for earthquake simulation, the model parameter design and analysis method including vibration direction, driving means, table size and control mode are put forward based on the analysis of system composition and working principle. The dynamic performance of this system and the optimization of system components are described. The self-assembled shaking table in Southeast University is set to be one horizontal direction, electro-hydraulic servo control, steel welded structure, table size of 6 m×4 m, maximum model load of 30 t, maximum acceleration of 1.5 g, maximum velocity of 600 cm/s, maximum stroke ±250 mm, maximum exciting force ±1000 kN, frequency range 0.1 to 50 Hz. The seismic table tests of El-Centro wave, Taft wave and Kobe wave with different compression ratios of 1:1, 1:2, 1:3, 1:4 with an empty load and the load of a steel frame model are conducted, and the waveform coefficient is greater than 0.75. The experimental results show that the system has little waveform distortion and good dynamic performance. It can meet most of the seismic testing needs.