飞机水平荷载作用下水泥混凝土道面结构响应

Mechanical responses of cement concrete pavement considering aircraft horizontal loadings

针对飞机在起飞状态和着陆滑跑时对水泥混凝土道面结构产生较大的水平荷载,采用ANSYS软件建立足尺9块道面板三维有限元分析模型,研究了2种典型飞机起飞时轮载作用于6种荷载位置时道面结构的力学响应,并分析了着陆时水平力系数对道面结构响应的影响。结果表明:起飞时,2种机型对道面结构的应力峰值分别变化了0.12MPa和0.05MPa;道面板应力峰值与水平荷载呈线性变化,仅在单轮主起落架作用在荷位1时呈非线性关系;轮载作用于板中和纵缝板边时,水平荷载对道面板应力影响较小;轮载作用于板角和横缝中部时,道面板应力峰值同水平荷载方向有关。

Cement concrete pavement accepts horizontal loads when the aircrafts taking off and landing. ANSYS software was adopted to create a 3-D finite element model with nine full scale slabs. Mechanical responses of the cement concrete pavement were studied under six different load positions and two different typical aircraft taking-off loads, and the influence of the horizontal force coefficients on pavement structure responses was analyzed during landing. The results show that the pavement peak stress caused by two kinds of planes changes only by 0.12 MPa and 0.05 MPa. There is a linear relationship between the pavement peak stress and horizontal load, except when the single wheel of main landing gear works on the position one. When the wheel load located at pavement center and longitudinal joints, the horizontal load has a less influence on the pavement stress, and when the wheel load located at corner and horizontal joints, the peak stress of pavement is relevant to the direction of the horizontal load. 5 tabs, 9 figs, 12 refs.