【摘要】 基于丹佛国际机场跑道实测道面应变及弯沉数据,分析不同载荷飞机(B-737-300、B-757-200、B-777-200)在滑行过程中机场跑道的动力响应。结果表明,三种机型作用下跑道的应变与弯沉变化相似,均表现为峰值与轮轴相对应。跑道横缝板的板边与板中,主要表现为压应变,且维持一定水平后波动;在纵缝板的板边,应变表现为拉压转换,应力处于循环状态,轮轴间的应变回复量显著,易发生疲劳破坏。纵缝板的板边和板中弯沉曲线表现为单峰值余弦形式。板角与横缝板板边弯沉为双峰值曲线;且曲线上加载段与卸载段存在突变现象。在飞机载荷作用下,3.05~6.10 m范围内地基主要表现为弹性变形;可将3.05 m深度以下地基视为弹性地基。所得结论对机场跑道工程的优化设计与科学施工具有参考价值。更多还原

【Abstract】 Based on the measured strain and deflection data of the runway of Denver International Airport,the dynamic response of the different load aircraft( B-737-300,B-757-200,B-777-200) during the taxiing process was analyzed. Results show that,the strain of the runway under three models is similar to that of the deflection,and both the peaks value correspond to wheel axle. In the edge and central of the runway transverse slot plate,main performance is compressive strain and maintain a certain level of fluctuations. At the edge of the longitudinal plate,strain is conversed between tension and compression,and stress is in the state of circulation,wheel strain recovery is significant,fatigue damage are easily occurred. Longitudinal slot plate’s edge and central section are bent into a single peak cosine curve. Transverse slot plate’s plate angle and edge are bent into a double peak curve,and there is a sudden change in the loading and unloading sections of the curve. Under the action of aircraft load,foundation is mainly elastic deformation in the range of 3. 05 ~ 6. 10 m,and foundation below 3. 05 m depth can be regarded as elastic. These conclusions can be useful as guidance for the optimum design and scientific construction of airport runways.更多还原