A SIMPLE MODEL TEST METHOD ON SEISMIC DYNAMIC RESPONSE CHARACTERISTICS OF ROCK SLOPES

In order to study the response characteristics of rock slopes under dynamic load, a simple model test method was designed. Based on the prototype of the Guantan landslide, following the law of similitude, a physical model test device is built to research on seismic response of the model slope with different input wave frequencies, excitation directions and amplitudes. The main conclusions are drawn as follows:The slope had vertical and free face amplification for the incident wave, and the amplification effect is more significant with the measuring point closing to the surface. Besides, dynamic response characteristics of the model are affected by the frequency and the direction of the incident wave, and there is a positive correlation between the acceleration amplification coefficient P and the amplitude of the incident wave. The results show that this simple method is able to reflect the seismic dynamic response characteristics of rock slopes, meanwhile, it is inexpensive, flexible and convenient.