机场装配式预应力混凝土道面冲击荷载研究与数值模拟

Research and numerical simulation on impact load of prestressed concrete pavement in airport

通过重型落锤式弯沉仪模拟飞机冲击荷载对道面的作用,测试了柔性过渡层预应力混凝土道面的板底应力和竖向位移。采用ABAQUS有限元软件建立了3D模型,以现场弯沉值和板底应力数据,校检了有限元模型拟合程度。并分析了不同冲击荷载、不同柔性过渡层厚度、不同冲击位置3个因素对柔性过渡层预应力道面板抗冲击荷载性能的影响。现场试验与数值模拟结果表明:柔性过渡层可提高预应力道面的抵抗冲击性能,提升道面板使用寿命。

The stress and vertical displacement of prestressed concrete pavement with flexible transition layer were measured by simulating the impact load of aircraft on pavement with heavy drop weight bending instrument.ABAQUS finite element software was used to establish a 3D model,and the fitting degree of the finite element model was checked based on the field bending settlement value and plate bottom stress data.The influence of different impact load,thickness of flexible transition layer and impact position on the impact resistance of prestressed pavement panel of flexible transition layer is analyzed.The results of field test and numerical simulation show that the flexible transition layer can improve the impact resistance of prestressed pavement and prolong the service life of pavement.