中文摘要：

为客观地反映沥青路面的力学行为，需要对温度、频率及应力状态这3个因素的影响进行综合考虑．通过对沥青混合料不同条件下动态模量试验结果的分析，表明沥青混合料的力学性质具有应力依赖性，尤其在温度较高时更为明显．以Sigmoidal函数为基础，结合Hirsh模型、肛口模型和Arrhenius函数建立了沥青混合料动态模量应力依赖性的模型．根据试验结果确定了其参数，并对其进行了有效性验证．该模型将温度、频率及应力状态对沥青混合料力学性能的影响归人统一的数学公式中，可以方便地用于路面结构分析．利用非线性三维有限元对典型沥青路面结构进行了分析，得到了路面结构内的应力状态对沥青层动态模量分布的影响规律．

英文摘要：

The effects of temperature, loading obtain realistic results of pavement responses. frequency, and stress state were considered in order to Dynamic modulus test results obtained at various condb tions were analyzed. It is found that asphalt mixtures exhibit stress-dependent behavior, especially at high temperatures. A stress-dependent model was developed for asphalt mixtures based on Sigmoidal function, incorporating Hirsh model, k-θ model and Arrhenius function. The coefficients of the model were determined by the test results and its validity was verified. This model incorporates the effects of temperature, loading frequency and stress state on asphalt mixture＇s mechanical properties into math- ematical eqhations and can be easily used in pavement analyses. Non-linear three dimensional finite element analyses based on the model were conducted for a typical asphalt pavement, and the influences of stress state on dynamic modulus distribution within the pavement were investigated.