水泥混凝土基面上沥青铺装剪应力分析与评价

考虑到直接计算最危险破裂面上剪应力的不便性,提出了用八面体剪应力代替最危险破裂面上剪应力,并用于分析与评价沥青铺装结构抗剪切能力的方法。结果表明:力学分析获取八面体剪应力的方法,配合无侧限抗压试验和贯入试验确定材料抗剪切参数的方法,可共同构成分析和评价沥青铺装抗剪切能力的有效方法体系。其八面体剪应力沿深度的分布曲线,可为沥青铺装设计和材料选择提供重要参考。

Analysis and Evaluation on Shear Stress of Asphalt Pavement on Cement Concrete Surface

Considering inconvenience to directly calculate the shear stress of the most dangerous fracture surface,this paper puts forward the method of calculating octahedral shear stress instead of the shear stress on the most dangerous fracture surface for analysis and evaluation of asphalt-pavement structure shear resistance.It is indicated from the result that the approach of obtaining octahedral shear stress through mechanical analysis combined with the approach of determining material＇s shear stress parameters through unconfined compression test and penetration test can jointly constitute an effective methodological system for analysis and evaluation of asphalt pavement shear resistance.The distribution curve along depth of octahedral shear stress may provide main reference for asphalt pavement design and material selection.