摘要
本文将Ｂｕｒｇｅｒｓ模型作为沥青混合料的粘弹性本构模型，提出了一种根据动态试验结果确定Ｂｕｒｇｅｒｓ参数的方法。研究表明，并联参数Ｅ２、η２与试验频率及温度相关，串联参数Ｅ１、η１则仅取决于试验频率的极限特性．此外，通过引入一个损伤函数，提出了一种应用Ｂｕｒｇｅｒｓ模型分析地方混合料疲劳过程的方法．应用这种方法，可以计算应力控制和应变控制疲劳过程中的耗散能密度及其变化，并可根据常应变疲劳方程导出常应力疲劳方程，或由常应力疲劳方程导出常应变疲劳方程。
In this paper,Burgers model is employed for the analysis of the dynamic experimentalresults of bituminous mixtures. And a method to determine the Burgers parameters bydynamic modulus test is suggested. The variation of these parameters values with experimental freguency and temperature is obtained. Experimental results show that E1 and η1 dependon the limit freguency characteristics ;E2 and η2 vary with experimental freguency and temperature. Moreover,a method to apply Burgers model to anslysis of fatigue process is suggsetedvia adopting a fatigue damage function. Stress,strain and dissipated energy density as well astheir variation in whole fatigue process can be calculated analytically by means of presentedmethod. Moreover, if the fatigue equation corresponding to constant stress amplitude isknown,the fatigue equation for constant strain amptitude can be predicted and vice versa.
出处
《长沙交通学院学报》
1995年第3期32-42,共11页
Journal of Changsha Communications University
基金
国家自然科学基金
比利时布鲁塞尔地区博士后研究基金
关键词
沥青混合料
动态试验
粘弹性
疲劳
bituminous mixture
dynamic test
fatigue
visco-elasticity
Burgers model
