不同等效原则的基层顶面当量回弹模量算法

应用弹性层状理论，研究了不同等效方法对基层顶面当量回弹模量换算结果的影响。结果表明，以弯沉等效为指标的基层顶面当量回弹模量值不能很好地反映板下地基的受力特性，会导致板底应力计算结果偏小；而以板底拉应力等效为指标的基层顶面当量回弹模量值能较为真实地反映基层刚度和厚度变化对板底拉应力的影响。因此，对于水泥混凝土路面结构设计时建议采用基于拉应力等效的换算方法，而基于弯沉等效的换算方法则可用于基层(或垫层)弯沉的检测。

Calculation method of equivalent modulus of elasticity of foundation under principles of different equivalence

The paper studied the calculation method of equivalent modulus of elasticity of foundation under principles of different equivalence by elastic multi-layer theory. The principles of displacement equivalence could not accurately image the stress response of foundation under cement concrete pavement,which induce the biggish error of flexural tensile stress of cement concrete pavement. But the principles of stress equivalence could accurately reflect the influence on the cement concrete pavement stress by the modulus and thickness of semi-rigid type base. So when the load stress of cement concrete pavement is analyzed,the equivalent modulus of elasticity is obtained by the principles of stress equivalence.2 tabs, 7 figs, 6 refs.