现有高等级公路改成飞机跑道的承载力分析

Analysis of the Bearing Capability of Existing High-grade Pavement Transformed into Airstrip

战时当军、民用机场遭到破坏,恢复和新建机场困难很大,将现有高等级公路直线段应急改成飞机跑道成为恢复空运保障能力最有效的途径之一。为了研究现有高等级公路起降飞机时的承载能力,首先分析了飞机荷载的作用模式;其次在考虑道面材料特性及飞机荷载特性对道面应力影响的基础上,提出合理的三维有限元结构分析模型,并利用ANSYS有限元分析软件对兼有垂直力和水平力的飞机荷载作用下的道面结构层进行了应力分析,据此得到了高等级公路的承载力,可作为今后高等级公路直线段应急改成飞机跑道的设计计算参考。

In wartime, both the military and civil airports might be destroyed to be too hard to be repaired or rebuilt, in which case the most possible approach to resuming the airline-carriage capability would be to transform the high-grade pavements into lash-up pavement airstrips. In order to study the bearing ability of high-grade pavement under airplane load, a loading mode of airplanes is studied first. Then, on the basis of the effect research of the characteristics of airstrip materials and airplane load applied to airstrip, a three-dimensional finite element model（FEM） for structural analysis is put forward, and the stresses of high-grade pavement structure under the action of airplane load, which is composed of both vertical loads and horizontal loads, are analyzed by ANSYS. The bearing capability of high-grade pavement is obtained by the research above, the result of which may serve as a reference for the designs and calculations of the high-grade pavement transformed into lash-up pavement airstrip in the future.