摘要
为了对路面结构在实际车辆荷载影响下的工作状态做出更加准确的判断,对现有道路结构在移动荷载作用下的弯沉及应力响应进行了分析研究。首先对车辆荷载荷载参数换算理论做了简单介绍,应用ABAQUS建立路面结构的模型,使用DLOAD子程序实现车辆荷载的移动,分析了不同车速、不同轴载作用下的路面面层弯沉及应力变化情况。结果得出:随着车速的增加,路表弯沉值,上、下沥青面层的层底正应力、拉应力值总体呈现减小趋势,但在70 km/h左右,各项指数反趋势增长;随着车辆轮胎接地压强的增加,路表弯沉值,上、下沥青面层的层底正应力、拉应力值显著增大。
In order to make a more accurate judgment on the working state of the pavement structure under the influence of the actual vehicle load,the deflection and stress response of the existing road structure under the action of moving load were analyzed and studied.First,a brief introduction to the theory of vehicle load parameter conversion is given.The model of the pavement structure is established using ABAQUS,and the subroutine DLOAD is used to realize the movement of the vehicle load.The road surface deflection and stress under different vehicle speeds and different axle loads are analyzed.The results show that with the increase of vehicle speed,the deflection of the road surface,the normal stress and tensile stress of the upper and lower asphalt surface layers show a general decreasing trend,but around 70 km/h,the various indexes change in the opposite trend.With the increase of the ground pressure of the vehicle tires,the deflection of the road surface,the normal stress and tensile stress of the upper and lower asphalt surface layers increase significantly.
作者
李家俊
范英
LI Jia-jun;FAN Ying(School of Transportation and Logistics,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《太原科技大学学报》
2022年第3期231-235,共5页
Journal of Taiyuan University of Science and Technology
基金
山西省重点研究计划(201903D121176)。
关键词
沥青路面
移动荷载
车速
应力
应变
asphalt pavement
moving load
speed
stress
strain
