DOI: 10.11908/j.issn.0253-374x.20107

作者:

作者单位: 1.同济大学 道路与交通工程教育部重点实验室，上海 201804;2.同济大学 民航飞行区设施耐久与运行安全重点实验室， 上海 201804;3.中国建筑第八工程局有限公司 工程研究院，上海 200122


作者简介: 赵鸿铎（1976—)，男，教授，博士生导师，工学博士，主要研究方向为道路与机场工程。 E-mail:hdzhao@tongji.edu.cn


通讯作者: 吴荻非（1994—)，男，助理研究员，工学博士，主要研究方向为智能交通基础设施。 E-mail:1994wudifei@tongji.edu.cn

中图分类号: U416.222


基金项目: 国家自然科学基金(52008309, 51778480); 教育部?中国移动科研基金(2018202004)




Effect of Support-loss on Stress Distribution of Airport Concrete Pavement Slab and Critical Support Condition
Author:

Affiliation: 1.Key Laboratory of Road and Traffic Engineering of the Ministry of Education， Tongji University， Shanghai 201804， China;2.Key Laboratory of Infrastructure Durability and Operation Safety in Airfield of CAAC， Tongji University， Shanghai 201804， China;3.Engineering Research Institute， China Construction Eighth Engineering Division Co.， Ltd.， Shanghai 200122， China


Fund Project:




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摘要:基于层间弹簧模型提出支承状态模拟方法，构建刚性道面板数值仿真模型。考虑不同飞机荷载和接缝状态，分析脱空影响下的道面板荷载应力增幅、位置偏移及重分布规律。结果表明：层间弹簧模型可准确地模拟脱空导致的刚性道面板支承损失以及不同脱空状态；随着脱空加剧，脱空区边缘的荷载应力增大，最大荷载应力在板厚方向上的位置由板底转移至板顶；当脱空区内最大荷载应力超过健康状态（即无脱空）下临界荷位的峰值应力时，该脱空状态即为临界脱空状态。相比传统弯沉指标，临界脱空状态能够更准确地反映脱空对道面结构的影响。



Abstract:By using an array of spring elements to simulate the support condition under airport concrete pavement slab， a numerical simulation model was developed to study the variation of aircraft-induced strain under poor support conditions. The different aircraft loads and load transfer states at joints were considered. A full-scale experiment was conducted for model verification. As indicated in the results， the spring-based method that simulates the support condition performs well on solving the mechanical responses. Support-loss would increase the tensile strains at the edge of support-loss region， and the location where critical tensile strain occurs would be transferred from the bottom to the top of the pavement. When the critical tensile strain under poor support condition exceeds the maximum tensile strain under intact condition， the support condition was determined as the critical support condition. Compared with the conventional evaluation methods of support condition （e.g. deflection-based methods）， the critical support condition can reflect the effect of support-loss more accurately.





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