水泥砼加铺层的温度与荷载耦合应力分析

Analysis of the Temperature and Load Coupling Stress of Cement Concrete Overlay on the Asphalt Pavement

采用有限元方法,对旧沥青路面上加铺水泥砼复合路面结构进行了温度与荷载应力分析,得出了板底荷载和温度最大耦合应力随加铺层厚度、旧沥青路面厚度和模量等参数变化的规律。结果表明:耦合应力作用下,加铺层的最小设计厚度为22 cm,加铺设计时应根据旧沥青路面厚度、承载力及旧路病害程度适当增加厚度。

In this paper,we analysed the temperature and load coupling stress of cement concrete overlay on the composite asphalt pavement using the finite element method.And obtained the regularity of the bottom load of the board and the maximum temperature and coupling stress＇changing with the alter of thickness of the overlay,the old asphalt pavement thickness and modulus.The results showed that,under the coupling stress,the minimum design thickness of overlay should be 22 cm,and the thickness should be appropriatly increased with the change of old asphalt pavement thickness,the bearing capacity and the disease extent during the design of concrete overlay.