Model Tests of Seismic Stability of Several Types of Soil Retaining Walls - Reinforced Soil Engineering: Advances in Research and Practice - page 335

waves, these shaking tests were additionally conducted on limited types of RWs.
By reducing the number of cycles from 50 to 20, it was attempted to observe their
behaviors at higher seismic loads after the formation of the failure plane. In these
tests, a noticeable amplification of the response acceleration took place before the
formation of the failure plane, in contrast to the attenuation in the response
Figure 20 Relationships between peak horizontal response acceleration.