关键词: 轮压, 半刚性路面结构, 橡胶沥青, 受力变形, 数值仿真分析

Abstract: With the implementation of the urban construction plan of the Xiongan New District and according to the construction standards that the road required no minor in Xiongan New District in 15 years,Hebei province has launched an important project for the development and testing of major equipment for the accelerated loading test of the whole road.The global pavement accelerated loading test device was used to test the performance of the semi-rigid rubber asphalt pavement structure.It combinedwith mechanical- DOI:10.3969/j.issn.1000-1565.2019.06.003不同轮压与厚度下的半刚性橡胶沥青路面结构受力变形与仿真分析杨三强¹,何伟¹,吴浩楠²,蔡永利³(1. 河北大学 建筑工程学院,河北省土木工程监测与评估技术创新中心,河北 保定 071002;2.河北建设集团股份有限公司 路桥公司,河北 保定 071070;3.中电建冀交高速公路投资发展有限公司,河北 石家庄 050051)摘 要:随着国家雄安新区城市建设规划实施,按照雄安新区道路建设15年不小修的建设标准,河北省启动了全域路面加速加载试验装置开发与试验路评价研究专项.本研究采用全域路面加速加载试验装置测试直道半刚性橡胶沥青路面结构性能的各项指标,结合力学分析法与有限元建模计算分析层底弯拉应力与层厚.通过构建有限元模型,分析不同轮压下(0.7、0.9、1.1 MPa)的半刚性橡胶沥青路面各结构层间的应力应变变化规律及相同结构层不同轮压下的受力变形规律.结果表明,沥青路面作为粘弹性体,路面结构受力同时遵循能量耗散原理,自上而下逐渐减小.提出了半刚性胶粉改性沥青路面结构层在不同轮压、不同深度下的应力变化规律,得出了半刚性胶粉改性沥青路面各层在不同荷载下的应力值变化范围与半刚性水泥稳定碎石基层在不同荷载下的应力值变化范围.这些研究成果对今后雄安新区耐久性沥青路面建设起到了重要的理论支撑与技术指导价值.关键词:轮压;半刚性路面结构;橡胶沥青;受力变形;数值仿真分析 中图分类号:U416.217 文献标志码:A 文章编号:1000-1565(2019)06-0573-06Stress deformation and simulation analysis of semi-rigid rubber asphalt pavement under different wheel pressure and thicknessYANG Sanqiang¹,HE Wei¹,WU Haonan²,CAI Yongli³(1.Hebei Civil Engineering Monitoring and Performance Evaluation Technology Innovation Center,College of Civil Engineering and Architecture, Hebei University, Baoding 071002, China;2.Rood and Bridge Brunch,Hebei Construction Group Corporation Limited,Baoding 071070,China;3.Zhong Dian Jian Ji Jiao Express Way Investment Development Co.Ltd.,Shijiazhuang 050051,China )Abstract: With the implementation of the urban construction plan of the Xiongan New District and according to the construction standards that the road required no minor in Xiongan New District in 15 years,Hebei province has launched an important project for the development and testing of major equipment for the accelerated loading test of the whole road.The global pavement accelerated loading test device was used to test the performance of the semi-rigid rubber asphalt pavement structure.It combinedwith mechanical- 收稿日期:2019-03-27 基金项目:河北省自然科学基金资助项目(E2018201106);河北省交通运输厅科技项目(TH-201925;TH-201918);河北省高层次人才资助项目(B2017005024);交通运输部科技示范项目(2016010) 第一作者:杨三强(1980—),男,四川绵阳人,河北大学教授,博士后,主要从事公路工程路基路面工程研究. E-mail:ysq0999@163.com第6期杨三强等:不同轮压与厚度下的半刚性橡胶沥青路面结构受力变形与仿真分析analysis and finite element modeling, the bending stress and layer thickness of the layer are analyzed.The finite element model was constructed to analyze the stress-strain variation between the structural layers of semi-rigid rubber asphalt pavement under different wheel pressures(0.7 MPa, 0.9 MPa, 1.1 MPa).And it also analyzes the force deformation law of structural layers under different wheel pressures of the same structural layer.The results show that the asphalt pavement acts as a viscoelastic body and the stress of the pavement structure follows the principle of energy dissipation.Stress changes gradually, decreasing from top to bottom.The variation range of stress value of different layers of semi-rigid rubber powder modified asphalt pavement under different loads and the variation range of stress value of semi-rigid cement stabilized macadam base under different loads are obtained in this study.At last,these research results will serve as an important theoretical support and technical guidance value for guiding the construction of durable asphalt pavement in Xiong'an New District in the future.

Key words: wheel pressure, semi-rigid pavement structure, rubber asphalt, deformation, numerical simulation analysis