多轴移动荷载作用下长大上坡沥青路面动力响应研究  

Research on Dynamic Response of Upslope Asphalt Pavement of Changda Expressway under the Effect of Multiaxial Moving Load

作　　者：张扬[1] 韩延波[1] 韩蕊[1] 

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室,西安710064

出　　处：《北方交通》2013年第4期19-23,共5页Northern Communications

摘　　要：为了研究长大上坡沥青路面多轴重载货车对路面的动力响应的影响规律,建立了多轴移动荷载作用下的长大上坡沥青路面动力学模型,深入分析了四轴车作用下长大上坡沥青路面的动力响应规律。研究结果表明:多轴车作用下,各动力响应参数存在明显的干涉现象;水平力对面层底部纵向弯拉应变和纵向剪应变有明显的削弱作用;面层底部横向剪应变对路面的剪切流动变形作用较大,建议将其作为半刚性基层沥青路面设计的控制指标。In order to research the influencing law of muhiaxial heavy load truck on the upslope asphalt pavement of Changda Expressway on the dynamic response of pavement, the dynamical model of upslope asphalt pavement of Changda Expressway under the effect of muhiaxial moving load is established, and the law of dynamic response of upslope asphalt pavement of Changda Expressway under the effect of four - axle car is analyzed deeply. The research result shows that ： under the effect of multi - axle car, each dynamic response parameter has obvious interference phenomenon; horizontal force has obvious extinction effect on longitudinal flexural -tensile strain and longitudinal shearing strain at the bottom of surface course ; horizontal shearing strain at the bottom of surface course has larger shear flow deformation process on the pavement, so it is recommended to take it as the control index of semi -rigid base asphalt pavement design.

关 键 词：道路工程 沥青路面 移动荷载 长大上坡 动力响应 

分 类 号：U416.217[交通运输工程—道路与铁道工程]