关键词: 道路工程, 伸缩缝界面, 有限元, 李占结性能

Abstract: The mechanical characteristic of continuous bridge expansion joints interface under traffic loads and temperature contraction were studied by finite element analysis and the causes for de-bonding of continuous bridge expansion joints interface were discussed. The influences of joint material modulus , pavement thickness , width and the interfacial contact conditions on the interfacial bonding performance were then analyzed. The results shows that when the temperature contraction deformation is relative large , the tensile stress caused by temperature contraction has greater influence on the interfacial bonding performance than the shear stress caused by traffic loads; when the temperature contraction defo口nation is relative small , the tensile stress has less influence on the interfacial bonding performance than the shear stress does. It is concluded that increasing the joint material modulus and width , reducing the pavement thickness and coefficients of interfacial friction are provided to improve the bonding performance of expansion joints interface

Key words: road engineering, expansion joints interface, finite element, bonding performance