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大型飞机复杂轴载和重载会引起水泥混凝土道面结构力学响应变化等系列问题,通过使用Ever FE2.25软件,建立Winkler地基上足尺寸9块板有限元模型,并考虑板间接缝和骨料嵌锁影响,分析在大型飞机静载作用下水泥混凝土道面三维尺寸对板底最大弯拉应力的影响。计算结果表明:建议水泥混凝土面板单元平面细化到208 mm×208 mm,厚度为125 mm;有限元求解板底最大弯拉应力较MH法显著增大,后者计算解偏低;面板三维尺寸处于4000 mm×4 000 mm×200 mm~9 000 mm×5 000 mm×450 mm时,厚度的增加对道面板底最大弯拉应力降幅为1.49%/cm,板宽的增加对板底最大弯拉应力增幅为3.20%/m。
Large-scale aircraft with complex axle load and heavy load will cause the mechanical response changes of cement concrete pavement structure and so on. By using Ever FE2.25 software, the finite element model of 9 plates in full-size on Winkler foundation is established, The influence of the three-dimensional size of cement concrete pavement on the maximum bending and bending stress of slab under the static load of large aircraft is analyzed. The calculation results show that it is suggested that the unit surface of cement concrete is thinned to 208 mm × 208 mm and the thickness is 125 mm. The maximum bending stress of the plate bottom is significantly larger than that of the MH method by finite element method, and the latter is underestimated. The three- At the thickness of 4000 mm × 4 000 mm × 200 mm ~ 9 000 mm × 5000 mm × 450 mm, the maximum bending stress decrease of 1.49% / cm on the slab bottom due to the increase of thickness, Tensile stress increase of 3.20% / m.