中文摘要：

文章基于一阶剪切变形板理论和断裂力学理论，将钢桥面环氧沥青混凝土铺装层鼓泡形成扩展的脱粘过程简化为界面裂纹的扩展过程，得到了鼓泡裂纹尖端的位移场，推导出鼓泡裂纹尖端能量释放率的解析解，并与采用虚拟裂纹闭合法计算结果进行了对比，建立了鼓泡扩展的判断准则，讨论了载荷、鼓泡半径、铺装层厚度和弹性模量等因素对鼓泡裂纹扩展的影响。研究结果表明：鼓泡的径厚比较小时，剪切变形对鼓泡尖端能量释放率的影响不容忽视；鼓泡裂纹尖端的能量释放率随载荷和鼓泡半径的增加而变大，随铺装层厚度和弹性模量的增加而减小；适当增加铺装层厚度可以对鼓泡扩展起到抑制作用。研究结果对有效开展鼓泡模型试验和研究鼓泡病害的防治措施具有理论与应用价值。

英文摘要：

Based on the first-order shear deformation plate theory and interfacial fracture mechanics, the propagation of blisters in the epoxy asphalt concrete paving course of steel deck bridge was simpli- fied as the propagation of interface crack. Analytical solution for displacements, force and moment resultants were derived by directly solving the governing equation. Then a simple method of calculating the energy release rate of interface crack such as blisters was deduced, which was compared with the results by the virtual crack closure technique. A fracture criterion was proposed and the influence fac- tors of the propagation of blisters including load, blister radius, surfacing layer thickness and elastic modulus were discussed according to the fracture criterion. The results indicate that the influence of shear deformation on the energy release rate cannot be ignored when the diameter-thickness ratio is smaller. The energy release rate of the crack tip increases with the increase of load and blister radius, while the energy release rate of the crack tip decreases with the increase of surfacing layer thickness and elastic modulus. The proper increase of surfacing layer thickness can inhibit the propagation of blisters. The results presented have theoretical and practical value to the blisters model test and prevention measures study.