受力模式对沥青混合料动态模量的影响
发布时间：2018-08-03 13:40
【摘要】：采用不同受力模式对3种沥青混合料进行动态模量试验,分析了受力模式、围压、应变水平等因素对沥青混合料动态模量主曲线的影响,通过Fillers-Moonan-Tschoegl模型和改进Sigmoidal模型建立了沥青混合料移位因子-围压和动态模量-围压之间的函数关系式.结果表明:二次拟合可以消除沥青混合料动态模量主曲线上动态模量极值对移位因子计算模式的依赖;在相同换算频率时,沥青混合料单轴压缩、间接拉伸和四点弯曲动态模量有差别,在低温高频段更明显,但三者之间存在较好的线性关系;在高温低频段,围压对沥青混合料三轴压缩动态模量的影响较显著;沥青混合料四点弯曲动态模量对应变水平变化较为敏感.
[Abstract]:The dynamic modulus tests of three kinds of asphalt mixtures are carried out by using different stress modes. The influence of stress mode, confining pressure and strain level on the main curve of dynamic modulus of asphalt mixture is analyzed. Based on the Fillers-Moonan-Tschoegl model and the improved Sigmoidal model, the functional expressions between the displacement factor and the dynamic modulus-confining pressure of asphalt mixture are established. The results show that the quadratic fitting can eliminate the dependence of the dynamic modulus extremum on the displacement factor calculation model on the main curve of the dynamic modulus of asphalt mixture, and at the same conversion frequency, the asphalt mixture can be uniaxially compressed. The dynamic modulus of indirect tension is different from that of four-point bending, especially at low temperature and high frequency, but there is a good linear relationship between them, and the influence of confining pressure on the dynamic modulus of asphalt mixture under triaxial compression is obvious at high temperature and low frequency. The dynamic modulus of four-point bending of asphalt mixture is sensitive to the change of strain level.
【作者单位】： 南京林业大学土木工程学院;东南大学交通学院;
【基金】：国家自然科学基金资助项目(51308303) 江苏省基础研究计划(自然科学基金)资助项目(BK20130980) 高等学校博士学科点专项科研基金资助课题(20123204120011) 住房和城乡建设部科学技术计划项目(2013-K4-9)
【分类号】：U414
[Abstract]:The dynamic modulus tests of three kinds of asphalt mixtures are carried out by using different stress modes. The influence of stress mode, confining pressure and strain level on the main curve of dynamic modulus of asphalt mixture is analyzed. Based on the Fillers-Moonan-Tschoegl model and the improved Sigmoidal model, the functional expressions between the displacement factor and the dynamic modulus-confining pressure of asphalt mixture are established. The results show that the quadratic fitting can eliminate the dependence of the dynamic modulus extremum on the displacement factor calculation model on the main curve of the dynamic modulus of asphalt mixture, and at the same conversion frequency, the asphalt mixture can be uniaxially compressed. The dynamic modulus of indirect tension is different from that of four-point bending, especially at low temperature and high frequency, but there is a good linear relationship between them, and the influence of confining pressure on the dynamic modulus of asphalt mixture under triaxial compression is obvious at high temperature and low frequency. The dynamic modulus of four-point bending of asphalt mixture is sensitive to the change of strain level.
【作者单位】： 南京林业大学土木工程学院;东南大学交通学院;
【基金】：国家自然科学基金资助项目(51308303) 江苏省基础研究计划(自然科学基金)资助项目(BK20130980) 高等学校博士学科点专项科研基金资助课题(20123204120011) 住房和城乡建设部科学技术计划项目(2013-K4-9)
【分类号】：U414
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1 张U，
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