镐头机拆除工况下机场水泥道面的力学行为  

Mechanical Behaviors of Airfield Portland Cement Concrete Slabs in Process of Breaking With Pickaxe Machine

作　　者：袁捷[1] 杜浩[1] 凌建明[1] 朱剑[2] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海200092 [2]江苏省交通规划设计院,江苏南京210005

出　　处：《同济大学学报（自然科学版）》2013年第8期1225-1230,共6页Journal of Tongji University:Natural Science

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.Based on finite element method(FEM) software ABAQUS,a two-slab analysis model with a consideration of the 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 behavior of Portland cement concrete(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.

关 键 词：水泥道面 道面拆除 力学行为 有限单元法 

分 类 号：U416.216[交通运输工程—道路与铁道工程]