应用数学和力学2025，Vol.46Issue(9)：1119-1129,11.DOI:10.21656/1000-0887.450214
移动荷载作用下沥青路面主应力轴旋转及方向余弦研究
Study on Principal Stress Axis Rotations and Direction Cosines of Asphalt Pavement Under Moving Loadings
摘要
Abstract
To reveal the damage mechanism of asphalt pavement under single and multiple loadings with re-spect to the variations in the magnitude and direction of the principal stress,an asphalt pavement structure model was constructed with the finite element method.The stress paths and the direction cosine variations of the principal stresses in asphalt pavement structural elements under different numbers of axle loads were inves-tigated.The results show that,under both single and multiple loadings,the stress path and the rotation intensi-ty of the principal stress axis in the pavement structural elements change over time.During the movement of the load,as the wheel passes over the examined section,the direction cosine value corresponding to the principal stress alternates between positive and negative ones.Moreover,due to the interactions between different wheels,the positive and negative peak values of the direction cosines for different wheels differ.The direction cosine values of the 1st principal stress alternately switch between positive and negative ones both in the trans-verse and longitudinal directions,indicating that the principal stress direction experiences abrupt changes dur-ing vehicle loading.Furthermore,the alternations become more complex under multiple wheel loadings.Under prolonged cyclic loadings,this can lead to the formation of cracks in the pavement.关键词
沥青路面/荷载数量/主应力轴/方向余弦/数值模拟Key words
asphalt pavement/load quantity/principal axis of stress/directional cosine/numerical simulation分类
交通工程引用本文复制引用
董鹏军,唐伯明,曹雪娟..移动荷载作用下沥青路面主应力轴旋转及方向余弦研究[J].应用数学和力学,2025,46(9):1119-1129,11.基金项目
国家自然科学基金(52278441) （52278441）
重庆市研究生科研创新项目(CYB25264) （CYB25264）
