圆形均布荷载下铺面结构层应力的水平向分布规律

Horizontal Distribution of Pavement Structure Layer Stress Under a Circular Uniform Load

基于弹性层状理论,研究圆形均布荷载作用下铺面结构层底弯拉应力,土基顶面压应力水平向分布规律.考察了铺面结构层层底径向应力系数φr、切向应力系数φθ和土基顶面压应力系数φz随距荷载圆中心点水平距离r的增加而衰减的规律,分析总结了铺面结构参数对上述3个应力系数的影响,给出了3个应力系数与铺面结构参数和距荷载圆中点水平距离r之间的回归关系式.

Based on elastic layer theory, horizontal distributions of tensile stress and subgrade compressive stress of pavement structure layer are studied. The rules of the radial stress coefficient φr and tangential stress coefficient φθ at the bottom of pavement structure layer and stress coefficient on the top of subgrade φz decreasing with the increasing of the horizontal distance between the midpoint of load and the calculation point r are investigated in detail. The influence of pavement structure parameters on the three stress coefficients φi is analyzed. The regression relationship among the three stress coefficients φi, pavement structure parameters and the horizontal distance between the midpoint of load and the calculation point r is given. The research results can provide foundation for the studying of multi-axle load superposition effect.