基于ABAQUS的机场刚性道面结构有限元模型

周正峰; 凌建明

doi:10.19818/j.cnki.1671-1637.2009.03.007

基于ABAQUS的机场刚性道面结构有限元模型

doi: 10.19818/j.cnki.1671-1637.2009.03.007

周正峰^1,,
凌建明²

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

基金项目:

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

详细信息

作者简介:
周正峰(1981-), 男, 湖北荆州人, 西南交通大学讲师, 工学博士, 从事机场工程研究

中图分类号: U416.222;V351.11
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出版历程
- 收稿日期: 2008-12-10
- 刊出日期: 2009-06-25

Finite element model of airport rigid pavement structure based on ABAQUS

ZHOU Zheng-feng^1
,,
LING Jian-ming²

1.
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
2.
Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China

More Information

Author Bio:
ZHOU Zheng-feng(1981-), male, lecturer, PhD, +86-28-87634347, zhouzf126@126.com

摘要

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。
- 机场工程 /
- 刚性道面 /
- 有限元模型 /
- ABAQUS /
- 结构响应 /
- 接缝传荷
Abstract: 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.
- airport engineering /
- rigid pavement /
- finite element model /
- ABAQUS /
- structural response /
- joint load transfer

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图 1 网格密度

Figure 1. Densities of element meshes

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图 2 最大应力收敛性

Figure 2. Convergences of maximum stresses

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图 3 最大挠度收敛性

Figure 3. Convergences of maximum deflections

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图 4 轮印分布

Figure 4. Wheel configurations

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图 5 单轴双轮作用下应力σ_y随x的变化

Figure 5. Changes of σ_ywith x under single axle-biwheel

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图 6 双轴双轮作用下应力σ_y随x的变化

Figure 6. Changes of σ_ywith x under biaxle-biwheel

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图 7 三轴双轮作用下应力σ_y随x的变化

Figure 7. Changes of σ_ywith x under triaxle-biwheel

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图 8 板侧面结点布置

Figure 8. Location of nodes in slab side face

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图 9 接缝有限元模型

Figure 9. Finite element model for joint

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图 10 应力σ_y随接缝刚度的变化

Figure 10. Changes of bending stresses with joint stiffnesses

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图 11 弯沉ω随接缝刚度的变化

Figure 11. Changes of deflections with joint stiffnesses

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图 12 ABAQUS模型验证

Figure 12. Verification for ABAQUS model

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图 13 不同构型起落架的σ_y

Figure 13. σ_yunder various landing assemblies

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图 14 不同构型起落架的ω

Figure 14. ω under various landing assemblies

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表 1 三维六面体单元的基本性质

Table 1. Properties of 3D hexahedral elements

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表 2 道面结构和材料参数

Table 2. Structural and material parameters of pavement

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表 3 飞机荷载参数

Table 3. Loading data of aircrafts

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表 4 实例中道面结构和材料参数

Table 4. Structural and material parameters in example

道面结构层	参数	数值
水泥混凝土面层	弯拉强度/MPa	5.0
	弯拉弹性模量/MPa	36 000
	泊松比	0.15
	厚度/cm	36
水泥稳定碎石基层	回弹模量/MPa	1 500
	泊松比	0.25
	厚度/cm	30
天然砂粒垫层及土基	反应模量/(MN·m^-3)	30

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参考文献(9)

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[2]	Federal Aviation Administration. Airport pavement designfor theBoeing 777 airplane[R]. Washington DC: US Department ofTransportation, 1995.
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[6]	IOANNIDES A M, ALEXANDER D R, HAMMONS MI, et al. Application of artificial neural networks to concretepavement joint evaluation[J]. Transportation ResearchRecord, 1996, 1540: 54-64.
[7]	IOANNIDES A M, KOROVESIS G T. Analysis and designof doweled slab-on-grade pavement systems[J]. Journal ofTransportation Engineering, 1992, 118(6): 745-768.
[8]	CROVETTI J A. Evaluation of jointed concrete pavementsystems incorporating open-graded permeable bases[D]. Urbana: University of Illinois at Urbana-Champaign, 1994.
[9]	ZOLLI NGER D G, BUCH N, XI N D, et al. Performance ofcontinuously reinforced concrete pavements[R]. Virginia: Federal Highway Administration, 1999.