Abstract: In order to consider the influence of the displacement effect of the retaining wall on the seismic earth pressure, according to the conclusions of previous experimental research, the friction angle is expressed as a function related to the displacement and the position height of retaining wall. Then based on the pseudo-dynamic method and the horizontal layer analysis method, the calculation expressions of the seismic non-limit active earth pressure and resultant force point of the wall in the RT mode are derived. The calculation model can describe different non-limit displacement state conditions in which the friction angle gradually develops along the wall height. And the relationship between the displacement of the retaining wall, the seismic load, and the earth pressure is established. The parameter analysis discusses the effects of vibration time, the displacement state of retaining wall, the seismic acceleration parameters and the soil friction angle on the seismic active earth pressure distribution, the resultant force and the height of the resultant action point. Compared with the traditional limit state seismic earth pressure theory, the proposed method describes the development process of seismic earth pressure with retaining wall displacement more reasonably. It has certain reference significance for the development of non-limit earth pressure theory and the improvement of seismic calculation methods in slope engineering.

Key words: earthquake, non-limit, displacement, pseudo-dynamic method