挡土墙地震土压力的拟动力分析

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (18) : 128-133.

论文

挡土墙地震土压力的拟动力分析

王浩1，2，董建华1,2，王永胜1,2，张媛1,2

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PSEUDO-DYNAMIC ANALYSIS FOR SEISMIC EARTH PRESSURE OF RETAINING WALL

WANG Hao1，2, DONG Jian-hua1，2 , WANG Yong-sheng1，2, ZHANG Yuan1，2

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文章历史 +

摘要

基于均匀土层剪切梁理论建立了边坡水平地震动力运动方程，得到了边坡坡后土体的水平位移和加速度响应。将水平加速度应用到挡土墙地震土压力拟动力分析中，对坡体刚性假定和加速度沿坡高恒定的不足进行了改进，推导出主动、被动土压力的计算公式。结合实际工程分析了墙后填土面倾角、填土内摩擦角、挡墙与填土界面摩擦角对于总土压力大小的影响，并与传统的拟静力法和拟动力法进行了比较，结果表明：地震土压力随着时间呈一种类似正弦或者余弦状波动；随着墙后填土面倾角增大挡土墙地震总主、被土压力的也呈逐渐上升趋势；随填土内摩擦角、以及挡土墙与填土界面摩擦角的增大挡土墙地震总主动土压力逐渐减小，而被动土压力则随之增大。传统的计算方法由于计算值偏小而不安全。

Abstract

Based on the shear beam theory of homogeneous soil layer, the motion equation is established under the horizontal earthquake, the horizontal displacement and acceleration response of slope is derived. The defects of the slope with rigid assumptions and constant acceleration along the slope hight are improved using the pseudo-dynamic method and the horizontal acceleration obtained, when seismic earth pressure is calculated. Then the formula of active and passive earth pressure is derived. Combined with the actual the project, the influence of the angle of filling behind retaining wall, internal friction angle, retaining wall and filling interface friction angle on the total earth pressure is analyzed and the improved method is compared with the traditional earth pressure methods. The results show that the seismic earth pressure is like a sine or cosine wave with time, the seismic active and passive earth pressure increases with the increase of the angle of filling behind retaining wall, the total seismic active earth pressure decreases with the increase of internal friction angle and filling interface friction angle gradually, while the total passive earth pressure increases. Traditional methods is not safe due to smaller calculated value.

导出引用

王浩1，2，董建华1,2，王永胜1,2，张媛1,2. 挡土墙地震土压力的拟动力分析[J]. 振动与冲击, 2016, 35(18): 128-133

WANG Hao1，2, DONG Jian-hua1，2,WANG Yong-sheng1，2, ZHANG Yuan1，2. PSEUDO-DYNAMIC ANALYSIS FOR SEISMIC EARTH PRESSURE OF RETAINING WALL[J]. Journal of Vibration and Shock, 2016, 35(18): 128-133

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