温度应力对机场道面板疲劳损伤的影响

张献民; 聂鹏飞; 高志斌; 包伊婷; 李长辉

doi:10.13700/j.bh.1001-5965.2021.0729

温度应力对机场道面板疲劳损伤的影响

doi: 10.13700/j.bh.1001-5965.2021.0729

1.
中国民航大学交通科学与工程学院，天津 300300
2.
天津滨海国际机场有限公司，天津 300300

基金项目: 中国工程院咨询研究项目(2019C1-0002)；天津市教委自然科学计划(2018KJ245)；天津市技术创新引导专项基金企业科技特派员项目(21YDTPJC00470)

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通讯作者:
E-mail：cauczxm@126.com

中图分类号: V351.11
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出版历程
- 收稿日期: 2021-12-03
- 录用日期: 2022-04-19
- 网络出版日期: 2022-06-09
- 整期出版日期: 2023-10-31

Influence of temperature stress on fatigue damage of airfield pavement slab

1.
School of Transportation Science and Engineering，Civil Aviation University of China，Tianjin 300300，China
2.
Tianjin Binhai International Airport Co.，Ltd.，Tianjin 300300，China

Funds: Advisory Research Project of the Chinese Academy of Engineering (2019C1-0002); Natural Science Foundation of Tianjin Education Commission (2018KJ245); Enterprise Science and Technology Commissioner Project of Tianjin Technology Innovation Fund (21YDTPJC00470)

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Corresponding author: E-mail：cauczxm@126.com

摘要

摘要:
目前，中国机场水泥混凝土道面设计中并未单独计算温度应力。参考传热学研究成果在道路工程和场道工程中的应用，采用华北地区某机场实例及其气象数据，建立有限元模型模拟道面结构温度场，并计算分析该机场道面板温度场和温度应力情况。结果表明，温度荷载造成的板底应力曲线与气温、辐射曲线之间存在较大的相位差，板底最大拉应力出现在19—20时。将随时间变化的温度应力与随横向位置变化的飞机轮载应力叠加，并将轮载作用次数按横向、月度、时刻分布，计算机场道面板的累计损伤和剩余寿命。结果表明，采用该方法预测的机场跑道剩余寿命与钻芯取样检测、FAARFIELD软件预测结果，以及跑道实际继续运营时长较为接近。可通过所提方法计算厚度较大的机场道面板的温度应力，对既有机场水泥混凝土道面结构的剩余寿命进行预测评估，并为大尺寸机场水泥混凝土道面板的研究和设计提供参考。
- 机场工程 /
- 水泥混凝土道面板 /
- 温度应力 /
- 轮载作用 /
- 累计损伤 /
- 疲劳寿命
Abstract:
At present, temperature stress is not calculated in the design of airfield cement concrete pavement in China. The finite element model is established to simulate the temperature field of the structure and analyze the temperature stress of the slab using the case of an airport in North China, its meteorological data, and the application of heat transfer theories in road engineering and airfield engineering. The results show that there is a large lag between the atmospheric temperature curve, the radiation curve, and the temperature stress curve of the slab bottom, which leads to the maximum temperature stress occurring at 19 to 20. We may examine the cumulative damage and remaining life of the airport pavement by superimposing the temperature stress, which varies with time, and the gear stress, which varies with transverse position, and dividing the number of gear load actions according to transverse position, month, and hour. The results show that the residual life of the airfield pavement analyzed by this method is close to the prediction result of core sampling and FAARFIELD, as well as the actual continuous operation time of the pavement. This method above can be used to calculate the temperature stress of the slab with large thickness, predict and evaluate the residual life of the existing airfield pavement structure, and is a reference for the research and design of the large-size airfield pavement structure.
- airport engineering /
- cement concrete pavement slab /
- temperature stress /
- gear load action /
- cumulative damage /
- fatigue life

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图 1 道面结构温度场示意图

Figure 1. Schematic diagram of pavement temperature field

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图 2 有限元模型

Figure 2. Finite element model

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图 3 不同月份温度应力随时刻变化

Figure 3. Temperature changes with moment in different months

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图 4 航班起降架次随月份变化

Figure 4. Flight coverage changes with months

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图 5 航班起降波形

Figure 5. Flight coverage waveforms

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图 6 疲劳模型比较

Figure 6. Comparison of fatigue models

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图 7 累计损伤计算流程

Figure 7. Flow diagram of cumulative damage calculation

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表 1 道面板边中点翘曲变形值有限元解与解析解的对比

Table 1. Comparison between FEM solutions and analytical solution of warping deformation at midpoint of edge of pavement slab

有限元/解析解	板重度	翘曲变形值/mm
有限元/解析解	板重度	长边中点	短边中点
有限元解	W	1.306	1.651
	0.1W	1.903	2.425
	0.01W	1.983	2.456
	0.001W	1.996	2.466
解析解		1.998	2.467

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表 2 机场跑道物理参数

Table 2. Physical parameters of airfield pavement

类型	厚度/m	密度/ (kg·m⁻³)	弹性模量/ MPa	泊松比	膨胀系数/ ℃⁻¹	导热系数/ (J·(m·h·℃)⁻¹)	比热容/ (J·(kg·℃)⁻¹)	太阳辐射吸收率	长波辐射吸收率	道面辐射发射率	天空辐射发射率
水泥混凝土面层	0.38	2500	38000	0.15	1×10⁻⁵	8000	960	0.76	0.85	0.63	0.88
水泥稳定碎石基层	0.4	2000	1500	0.25	9.8×10⁻⁶	6700	910
土基	10	1800	90	0.35	4×10⁻⁶	6300	1040

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表 3 机场跑道月平均气象参数

Table 3. Monthly mean meteorological parameters of airfield pavement

月份	最高气温/ ℃	最低气温/ ℃	风速/ (m·s⁻¹)	日总辐射量/ (J·m⁻²)	太阳辐射时长/h
1月	7.78	−2.22	3.67	5.34×10⁶	8.2
2月	13.33	0.56	4.96	9.10×10⁶	9.1
3月	19.44	5.00	5.34	1.143×10⁷	9.4
4月	23.33	8.33	5.32	1.686×10⁷	10.6
5月	31.67	17.22	5.20	1.730×10⁷	11.3
6月	32.78	21.11	4.38	1.444×10⁷	11.4
7月	31.67	21.11	4.04	1.076×10⁷	11.4
8月	32.78	22.78	4.32	1.945×10⁷	11.4
9月	30.56	17.78	3.96	1.176×10⁷	11.3
10月	21.67	11.11	3.54	9.71×10⁶	10.2
11月	16.11	5.00	4.41	8.70×10⁶	8.9
12月	8.89	−2.78	4.39	6.32×10⁶	8.3

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表 4 轮载应力计算结果^[17]

Table 4. Calculated gear load stress value^[17] MPa

机型	σ_H	σ_Z
A320	1.819	2.121
B737-800	2.388	3.432

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