镐头机拆除工况下机场水泥道面的力学行为

Study of Mechanical Behaviors of Airfield PCC Slabs In Process of Breaking With Pickaxe Machine

摘要:

以ABAQUS作为分析平台，建立了考虑接缝传荷以及层间接触效应的双板有限元分析模型，可用于模拟镐头机拆除工况下水泥道面的力学行为。针对机场典型拆除工艺参数及道面结构参数，系统分析了镐头机拆除工况下拆除板和周边保留板的变形、拉应力以及层间剪应力的分布特征，揭示了镐头机拆除工况下周边保留板发生破坏的力学机理。分析了面层厚度、接缝传荷能力等参数对拆除时道面力学响应的影响规律，提出了镐头机拆除施工应注意的问题。

Abstract:

Based on FEM software abaqus, a two-slab analysis model considering joint load transfer and interlayer contact condition is established, in which the model dimension, displacement boundary, load model, material model, joint load transfer are simplified. The Model can be used to study the mechanical behaviour of PCC pavement in process of breaking with pickaxe machine. Both deformation and tensile stress and interface shear stress of removal slab and reserved slab are calculated for typical breaking process parameter and pavement structure, the mechanism for destruction of reserved slab is also proposed.