北京航空航天大学学报 ›› 2022, Vol. 48 ›› Issue (4): 551-559.doi: 10.13700/j.bh.1001-5965.2020.0646

• 论文 • 上一篇    下一篇

机场跑道水泥混凝土道面板尺寸分析

张献民, 李梦晓, 陈宇, 李长辉, 徐博庆   

  1. 中国民航大学 交通科学与工程学院, 天津 300300
  • 收稿日期:2020-11-20 发布日期:2022-04-27
  • 通讯作者: 张献民 E-mail:cauczxm@126.com
  • 基金资助:
    中国工程院重点资询项目(2019C1-0002);天津市教委科研计划(2019KJ122);中国民航机场工程研究基地开放基金(205016010411,205016010413);中国民航大学科研启动基金(2020KYQD37)

Size of cement concrete pavement slab of airport runway

ZHANG Xianmin, LI Mengxiao, CHEN Yu, LI Changhui, XU Boqing   

  1. School of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China
  • Received:2020-11-20 Published:2022-04-27

摘要: 中国机场通常采用板宽不超过5 m的水泥混凝土道面板,国际上已有机场采用板宽6 m以上的水泥混凝土道面板。相比大尺寸水泥混凝土道面板,小尺寸道面板容易产生病害。为了研究道面板尺寸对道面性能的影响,基于弹性层状理论体系建立道面结构有限元模型,通过改变水泥混凝土道面板平面尺寸,研究了考虑温度梯度时飞机荷载作用下道面板内的应力变化。通过某机场实例分析了温度梯度和飞机荷载共同作用下道面板平面尺寸对道面使用寿命的影响,结果表明:道面板内应力受温度梯度影响较大,常见机型荷载作用下,夏季道面板内拉应力25%以上是由温度梯度荷载造成;不同尺寸道面板在相同荷载作用下,道面产生的损伤量不同,设计过程中加入道面板温度应力计算,选择合适的道面板尺寸,可以显著提高水泥混凝土道面的预期使用寿命。

关键词: 道面板尺寸, 温度梯度, 临界荷载, 累积损伤, 疲劳寿命

Abstract: Chinese airports usually use cement concrete road slabs with a slab width of no more than 5 m, and existing airports in other countries use cement concrete slabs with a width more than 6 m. Small size cement concrete pavement slabs are more likely to suffer from disease than large size. In order to study the effect of pavement slab size on pavement performance, a finite element model of pavement structure was established based on the elastic layered theoretical system. By changing the size of the pavement slab, the stress changes of the pavement slab under the combined action of aircraft load and temperature gradient are studied. The internal stress change of the slab is used to analyze the influence of the plane size of the pavement slab on the service life of the pavement slab under the combined action of temperature gradient and aircraft load through an example of real airport. The results show that the internal stress of the pavement slab is greatly affected by the temperature gradient. Under the action of common aircraft load, more than 25% of the internal tensile stress of the pavement slab in summer is caused by the temperature gradient load; under the same load, the damage of different sizes of pavement slabs is different, and choosing the appropriate pavement size can significantly increase the expected service life of the cement concrete pavement.

Key words: pavement slab size, temperature gradient, critical load, cumulative damage, fatigue life

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