SEISMIC PASSIVE EARTH PRESSURE CALCULATION OF COHSIVELESS SOIL UNDER UNIFORM LOAD
WANG Kuihua1，MA Shaojun1，2，WU Wenbing1
(1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，
China；2. Zhejiang Province Institute of Architectural Design and Research，Hangzhou，Zhejiang 310006，China)
Abstract：Based on the hypothesis of planar sliding surface，a modified pseudo-dynamic approach is proposed to overcome some shortage in method of seismic passive earth pressure calculation. The formulas are derived for the calculation of lateral earth pressure and total passive force under seismic condition by using pseudo-dynamic approach. The effects of wall friction angle，soil friction angle，horizontal and vertical seismic coefficients on the seismic passive force have been explored. The parametric study shows that the total seismic passive earth pressure increases with the increase in values of wall friction angle and soil friction angle；while it decreases with the increase in values of horizontal and vertical seismic coefficients. The calculation results of seismic passive force obtained from present analysis is larger than those obtained from Mononobe-Okabe theory. Unlike the Mononobe- Okabe theory，the present analysis predicts a nonlinear variation of passive earth pressure along the retaining wall.
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2011, Vol. 30 
