CAJ | 학술논문

在 Mononobe-Okabe 拟静力学理论的基础上,对挡土墙后填土进行应力分析,根据静力平衡求得滑裂面水平倾角.再结合土拱效应原理采用水平层分析法,对处于正常受力状态的填土微元体进行应力分析,并根据静力平衡和力矩平衡建立方程组,从而求得适用范围更广的地震作用下墙后土体的主动土压力、土压力系数、土压力合力作用点位置等的计算公式.利用数值方法分析土内摩擦角、墙土面摩擦角以及水平和竖向地震系数对滑裂角、主动土压力、土压力系数、土压力合力作用点位置的影响,并将计算结果与其他计算方法所得结果以及试验结果进行对比分析.
재 Mononobe-Okabe 의정역학이론적기출상,대당토장후전토진행응력분석,근거정력평형구득활렬면수평경각.재결합토공효응원리채용수평층분석법,대처우정상수력상태적전토미원체진행응력분석,병근거정력평형화력구평형건립방정조,종이구득괄용범위경엄적지진작용하장후토체적주동토압력、토압력계수、토압력합력작용점위치등적계산공식.이용수치방법분석토내마찰각、장토면마찰각이급수평화수향지진계수대활렬각、주동토압력、토압력계수、토압력합력작용점위치적영향,병장계산결과여기타계산방법소득결과이급시험결과진행대비분석.
On the basis of quasi-static theory of Mononobe-Okabe,the angle of sliding surface is obtained according to the static equilibrium after analyzing the stress of the filling behind retaining wall. Considering soil arching effect,the static equilibrium and moment equilibrium equations are then derived from analysis of the stress of microelement of filling layer which is in a normal stress state,using the method of horizontal layer analysis. After that,the formulas of active earth pressure,coefficient of earth pressure and action point of resultant force of filling behind the retaining wall under seismic activity,which are more usable,are respectively obtained. The influences of internal friction angle,wall friction angle,horizontal and vertical seismic coefficients on the angle of sliding surface,active earth pressure,coefficient of earth pressure and action point of resultant force are numerically analyzed. Furthermore,the results obtained by the proposed method are compared with those computed by other methods and experimental observation.