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作 者:鲜煜 XIAN Yu(CCCC Second Shipping Engineering Bureau Co.,Ltd.,Wuhan 430000,China)
机构地区:[1]中交第二航务工程局有限公司,湖北武汉430000
出 处:《中国高新科技》2025年第3期92-94,共3页
摘 要:文章通过建立有限元模型,分析了综合管廊下穿道路沥青路面结构在不同条件下的力学响应。从几何模型、材料参数、边界条件、荷载施加和网格划分等方面建立了模型,并通过理论分析验证了模型的准确性。研究结果表明,在20t轴重的车辆荷载下,沥青路面表层的剪应力峰值为0.25MPa;在夏季30℃条件下,表层剪应力下降至0.18MPa,而在冬季-10℃条件下,剪应力上升至0.38MPa。疲劳寿命估算显示:管廊上方的拉应变为0.0072mm/mm,对应的疲劳寿命为1.8×10^(6)次荷载循环,远低于无管廊区域的3.5×10^(6)次;高温下增加至2.1×10^(6)次,低温则下降至1.2×10^(6)次,增加路面厚度能有效提高路面疲劳寿命。In this paper,the mechanical response of asphalt pavement structure under different conditions is analyzed by establishing finite element model.The model is established from the aspects of geometric model,material parameters,boundary conditions,load application and mesh division,and the accuracy of the model is verified by theoretical analysis.The results show that the peak shear stress of asphalt pavement surface is 0.25MPa under vehicle load of 20t axle load.Under 30℃in summer,the shear stress drops to 0.18MPa,while under-10℃in winter,the shear stress rises to 0.38MPa.The fatigue life estimation shows that the tensile strain above the pipe gallery is 0.0072mm/mm,and the corresponding fatigue life is 1.8×10^(6)load cycles,which is much lower than the 3.5×10^(6)cycles in the area without pipe gallery.Under high temperature,it increases to 2.1×10^(6)times,and under low temperature,it decreases to 1.2×10^(6)times.Increasing pavement thickness can effectively improve pavement fatigue life.
分 类 号:U416[交通运输工程—道路与铁道工程]
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