| 不同面层组合形式下灌入式复合路面力学特性研究 |
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| 引用本文： | 魏小皓,罗桑,刘鎏,田佳昊.不同面层组合形式下灌入式复合路面力学特性研究[J].交通信息与安全,2017,35(6):108-114. |
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| 作者姓名： | 魏小皓 罗桑 刘鎏 田佳昊 |
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| 作者单位： | 东南大学交通学院 南京210096 |
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| 基金项目： | 东南大学优秀青年教师教学科研资助计划项目国家自然科学基金项目 |
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| 摘 要： | 针对灌入式复合路面结构设计中所需的路面应力和变形等情况,研究结合弹性层状理论体系,采用ABAQUS软件建立了不同面层组合形式下灌入式复合路面的力学仿真模型,包括:上中面层同为改性沥青混凝土或者水泥砂浆灌入式混凝土、上面层改性沥青混凝土+中面层水泥砂浆灌入式混凝土、上面层水泥砂浆灌入式混凝土+中面层改性沥青混凝土等,仿真计算出不同结构类型路面的层底应力、应变和路表弯沉等力学指标.结果显示,与普通路面结构相比,当水泥砂浆灌入层同时作表面层和中面层时,其层底拉应力和路表弯沉分别减少25.7%和50.9%;水泥砂浆灌入层作中面层时,相关力学性能也优于普通路面结构;水泥砂浆灌入层作表面层时,最大拉应力的影响范围要大于普通路面结构.研究结果表明,表面层和中面层均采用水泥砂浆灌入层的结构力学性能最优,为最佳的设计方案;中面层采用水泥砂浆灌入层的结构次之,不推荐采用水泥砂浆灌入层单独作表面层的结构方案.
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| 关 键 词： | 交通工程 灌入式复合路面 力学分析 有限元模拟 弯拉应力 路表弯沉 |
A Study on Mechanical Properties of Filling Composite Pavement under Different Surface Combination Types |
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| Abstract: | Considering stress and deformation of pavement in design of composite pavement structure,combined with an elastic layered theory system,the ABAQUS software is used to establish a mechanical simulation model of composite pavement with different surface combination types.The simulation including circumstances of surface and middle layers both using modified asphalt concrete or cement mortar pouring concrete;surface layer using modified asphalt pavement-middle layer using cement mortar pouring concrete;surface layer using cement mortar pouring concrete + middle layer using modified asphalt pavement.The mechanical properties,i.e.bottom stress,strain,and deflection of road surface,of different combination types of pavement are computed.Results show that compared with the common pavement structure,when surface and middle layers both using cement mortar pouring concrete,tensile stress of bottom layer and deflection of road surface are reduced by 25.7% and 50.9 %,respectively.When cement mortar is poured into middle layer,the relevant properties are also better than common pavement structure.When cement mortar is pouring into surface layer,the maximum tensile stress has greater influences than which of common pavement structure.It suggests that composite pavement has best mechanical properties when cement mortar is used for both surface and middle layer.When cement mortar is used for middle layer is less good,while it is only used for surface layer is not recommended. |
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