重载车辆不同行驶条件下沥青路面结构动态响应分析  

Dynamic Response Analysis of Asphalt Pavement Structure Under Different Driving Conditions of Heavy-Duty Vehicles

作　　者：郜鑫振 司春棣 凡涛涛[2,3] 张孟强 高海波 Gao Xinzhen;Si Chundi;Fan Taotao;Zhang Mengqiang;Gao Haibo(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Traffic and Transportation,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Jing-Xiong Expressway Preparatory and Construction Office of Hebei Expressway Group Ltd.,Baoding 071799,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]石家庄铁道大学交通运输学院,河北石家庄050043 [3]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [4]河北省高速公路京雄筹建处,河北保定071799

出　　处：《石家庄铁道大学学报（自然科学版）》2023年第1期48-53,共6页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(11972237);河北省交通厅科技计划项目(JD-202007,JD-202006,JX-202010)。

摘　　要：重载车辆在不同行驶条件下对路面的破坏程度有所不同,为定量分析何种行驶条件对路面影响最大,从实际路面结构出发,采用有限元仿真模拟对比分析重载车辆在匀速、制动和加速3种行驶状态下对路面不同结构层的动态响应影响规律,以制动为车辆行驶条件,进一步分析不同水平力系数Φ(0.3、0.5、0.7、0.9)对路面结构动态行为的影响。结果表明,3种行驶状态下路面结构层的横向应力和竖向应力差距均在10%左右;而路面结构层在减速和加速行驶状态下的纵向应力和纵向剪应力较匀速增涨幅度可达100%~150%;在分析的Φ范围内,横向应力和竖向应力极值在相邻水平力系数下变化幅度为1%~5%,而纵向应力和纵向剪应力极值随水平力系数的增加而变大,最大差值分别为0.596、0.618 MPa。Heavy-duty vehicles might exert different degrees of damage to the road surface under different driving conditions.In order to quantitatively analyze which driving conditions have the greatest impact on the road surface,this paper started from the actual road surface structure,and used finite element simulation to compare and analyze the dynamic response of heavy-duty vehicles to different structural layers of the road surface under three driving conditions of uniform speed,braking,and acceleration.Taking braking as the driving condition of the vehicle,the influence of different horizontal force coefficientsΦ(0.3,0.5,0.7,0.9)on the dynamic behavior of the road surface structure was further analyzed.The results show that the difference between transverse stress and vertical stress of pavement structure layer under three driving conditions is about 10%.The longitudinal stress and longitudinal shear stress of pavement structure layer under the condition of deceleration and acceleration can increase by about 100%~150%compared with constant speed.In the range ofΦanalyzed,the extreme values of transverse stress and vertical stress change by 1%~5%under the adjacent horizontal force coefficient,while the extreme values of longitudinal stress and longitudinal shear stress increase with the increase of horizontal force coefficient.The maximum differences are 0.596 MPa and 0.618 MPa,respectively.

关 键 词：沥青路面 移动荷载 行驶状态 水平力系数 动态响应 

分 类 号：U416.217[交通运输工程—道路与铁道工程]