脱空对机场道面板接缝传荷能力影响分析

采用有限元分析方法和多组模型试验,对考虑板中脱空和板角脱空两种情况的机场刚性道面板接缝处的应力及传荷能力进行分析。结果表明,道面板接缝处的传荷效率、道面板板底最大弯拉应力随着板底脱空面积的增大而增大。对于相同的脱空面积,接缝传荷效率和板底最大弯拉应力随着地基反应模量的增大而减小;而且板中脱空状态下的传荷效率略高于板角脱空状态下的传荷效率,板中脱空对脱空面积的反应比较敏感,这说明板中脱空对道面板产生的危害比板角脱空对道面板产生的危害要严重。

The analysis of void slab on airport pavement

Using finite element method and multiple set of model test to analyzes the stress and load transfer capacity of rigid airfield pavement joints when it is void on the corner or central of the slab. The results showed that the load transfer efficiency of pavement joints, the maximum bending tensile stress of the bottom of the pavement increase with the increase of void area. For the same void area, the load transfer efficiency of pavement joints and the maximum bending tensile stress of the bottom of the pavement decrease with the increasing of foundational response modulus. And the load transfer efficiency of void on the central is slightly higher than void on the corner, void on the is more sensitive to the void area of pavement. This shows that harm in void on the central than on the corner of pavement.