摘要
对浇注式沥青混合料进行了3种温度和3种荷载水平下的三轴重复荷载试验,利用Burgers模型推导了浇注式沥青混合料在重复荷载作用下的总应变公式.对理论应变公式和实验数据进行非线性拟合得到了浇注式沥青混合料在3种温度下的黏弹性参数,并分析了浇注式沥青混合料的永久变形和黏弹性变形的发展特性.研究结果表明:在半正弦重复荷载作用下,浇注式沥青混合料的变形规律与Burgers模型变形公式吻合较好,其永久变形随荷载作用呈线性增长,黏弹性变形先增长后趋于稳定,永久变形比例逐步上升;流动黏度随温度上升而迅速下降,延迟时间随温度上升而增加.
The triaxial repeated load test is conducted on gussasphalt under three stress levels at three temperatures.The Burgers model is used to deduce the deformation formulae of gussasphalt under re-peated load.The values of viscoelastic parameters at three temperatures are obtained by nonlinear re-gression analysis between theoretical formulae and experimental data.The characteristics of perma-nent deformation and viscoelastic deformation of gussasphalt are then analyzed.The research results show that the deformation law of gussasphalt under half sine repeated load agrees well with the de-formation formula of the Burgers model.The permanent deformation grows linearly with the increase of load times while the viscoelastic deformation increases at first and then becomes stable.The per-centage of permanent deformation keeps increasing under repeated load.And with the increase of temperature,the flow viscosity decreases rapidly while the retardation time increases.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第2期391-395,共5页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(51178114)
"十一五"国家科技支撑计划资助项目(2009BAG15B03)
