基于ABAQUS的机场刚性道面结构有限元模型  

Finite element model of airport rigid pavement structure based on ABAQUS

作　　者：周正峰[1] 凌建明[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《交通运输工程学报》2009年第3期39-44,共6页Journal of Traffic and Transportation Engineering

基　　金：国家自然科学基金委员会与中国民用航空总局联合项目(60776818)

摘　　要：应用有限元软件ABAQUS对Winkler地基上四边自由单块板在飞机轮载作用下的应力和挠度的收敛性进行了分析,确定了有限元模型应采用的单元类型、网格密度和平面尺寸。按照贡献面积刚度分配原则,通过在相邻混凝土板侧面的对应结点设置弹簧单元,模拟接缝集料嵌锁或传力杆的传荷作用,建立了板-接缝-基础道面结构体系3D有限元模型,并对比分析了有限元模型计算的接缝传荷系数与已有回归模型的预估结果。比较结果表明:在基于ABAQUS的刚性道面有限元模型中,考虑层间接触时,各结构层宜采用二次积分单元C3D27或C3D27R,相应的单元尺寸应不超过板厚的1/2,模型的平面尺寸需大于4倍相对刚度半径,接缝传荷作用可采用弹簧单元SPRING2进行模拟,接缝刚度可按照结点贡献面积进行分配。Based on ABAQUS software, the stress and deflection convergences of a slab with four free edges resting on Winkler foundation were analyzed. Appropriate continuum element type, mesh fineness and plane dimension for finite element model of jointed rigid pavement were studied. According to the concept of contributing areas, the stiffnesses of nodes along joint were distributed, and spring elements were set at corresponding points of abutting concrete boards to simulate force transfer among concrete boards. A comprehensive 3D finite element model to analyze the structural response of rigid pavement system was developed and verified. The transfer coefficients of joint loads for the model and a regress model were compared. Comparison result indicates that in the finite element model, second-order element C3D27 or C3D27R is most appropriate when considering interlayer contact. Relevant element dimensions should not exceed half of slab thickness. The maximum plane size of the model should be four times of relative stiffness radius. The element SPRING2 can be adopted to simulate the load transfer of joints in which stiffness are distributed to nodes based on their contributing areas. 4 tabs, 14 figs, 9 refs.

关 键 词：机场工程 刚性道面 有限元模型 ABAQUS 结构响应 接缝传荷 

分 类 号：U416.222[交通运输工程—道路与铁道工程] V351.11[航空宇航科学与技术—人机与环境工程]