摘要
本文采用有限元软件对低温地区典型的半刚性沥青路面结构进行了力学响应模拟,分别计算了温度应力和温度与荷载共同作用下的路面结构力学响应,分析了不同时刻路面内部温度应力随外界环境的变化规律,计算结果表明:无论是单独温度作用,还是荷载和温度共同作用,路面结构应力随外界气温呈现周期性变化,设置应力吸收层可显著减小沥青层底拉应力,说明设置应力吸收层可抑制或减缓基层反射裂缝向面层扩展。
In this paper, mechanics response of asphalt pavement on semi-rigid base was simulated by the finite element software based on low temperature. The pavement structure temperature stress and couple stress of temperature and traffic loads were calculated under different moment. The change law of temperature stress under climatic periodic variation was further studied. The calculation results show that no matter the effect of alone temperature or combination of load and temperature on the pavement structure, setting up the stress absorbing layer can significantly reduce the tensile stress of asphalt layer bottom in the pavement structure, and inhibit or slow down reflection crack spreading to the surface of pavement structures.the alone, alone or combination of load and temperature, the pavement structure stress varies with the temperature periodic change.
作者
秦珂
Ke Qin(ZhongJiao Guo Tong Highway Engineering Co., Ltd, Nanyang 473000,China)
出处
《青海交通科技》
2018年第6期73-76,共4页
Qinghai Transportation Science and Technology
关键词
低温地区
沥青路面结构
应力吸收层
温度应力
low temperature region
asphalt pavement structure
stress absorbing layer
temperature stress
