机场水泥混凝土道面板底脱空对荷载应力的影响

Influence of Void to Load Stresses of Rigid Airport Pavement

摘要:

提出了通过建立ABAQUS三维有限元模型，将计算弯沉盆与实测弯沉盆对比，得到较为精确的脱空参数的方法，并计算了机场水泥混凝土道面板底不同脱空程度对道面板荷载应力的影响。计算结果表明：有限元软件计算道面弯沉中，以静载代替脉冲荷载对计算结果影响很小；脱空区域基础与面层并非完全脱离，其反应模量较原值有一定折减；在严重脱空区域，道面荷载应力较未脱空时可增大80%。

Abstract:

Through the establishment of ABAQUS 3D-FEM model， the contrast between test deflection basin curve and calculate deflection basin curve, a more precise method is proposed to calculate void parameters. It analyses the influence of all kinds of void to loading stresses of airport cement concrete pavement. The result shows that in finite element software calculation pavement deflection, the replacement of pulse load by static load has little effect on the calculation results, the subgrade of void region is not completely divorced from the surface, and its response modulus has certain discount from original value, influence of void to loading stresses of airport cement concrete pavement reaches 80%.