均布荷载作用下的无黏性土地震被动土压力计算

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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.

Key words： soil mechanics passive earth pressure earthquakes pseudo-dynamic approach nonlinear distribution additional load

Received: 24 August 2010

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http://www.rockmech.org/EN/Y2011/V30/IS2/3611

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