Shear performance of cement concrete bridge deck pavement structure at different temperatures
In order to study the shear performance of cement concrete bridge pavement under different temperatures,a three-dimensional numerical model of bridge pavement was established by ABAQUS finite element software.The shear state of bridge pavement under different temperatures was analyzed,and the relationship between the shear strength of cement concrete,waterproof bond layer and asphalt mixture composite specimens was established.The results show that for bridge deck pavement under emer-gency braking of vehicle load,the longitudinal shear stress and transverse shear stress of asphalt surface decrease with the increase of temperature,and the longitudinal shear stress and transverse shear stress of leveling layer,interlayer structure between the lower layer of asphalt and the leveling layer increase with the increase of temperature.The shear strength of the film waterproof adhesive layer in the safe temperature range(＜40 ℃)is greater than that of the gravel sealing layer,but the temperature sensitivity of film waterproof adhesive layer is greater than that of crushed stone sealing layer.When the waterproof bond layer is in the dangerous temperature range(＞45 ℃),the emergency braking of the vehicle is not conducive to the stability of the interlayer structure.
万方数据
维普
