摘要
通过相同条件下一组大样本沥青混合料应变控制小梁弯曲疲劳试验,将弯曲疲劳循环次数和对应循环次数的模量无量纲化后,拟合得到了一组疲劳损伤和对应循环次数比的关系曲线,发现各曲线之间非常相似,尽管各试件的疲劳寿命相差较大。对曲线族进一步分析,归纳得到了此沥青混合料疲劳损伤的非线性演化的统一模型。
Four point bending beam fatigue tests are carried out with a large sample under the same conditions in this paper, and relation of each specimen between stiffness ratio（SR） and cycle ratio（CR） is fitted from the fatigue testing results. It is found that the shapes of SR-CR curves are all similar, although the differences of fatigue life among the specimens are very large. Furthermore, a uniform model for nonlinear evolution equation of fatigue damage of the asphalt mixture is obtained based on statistical analysis.
出处
《公路》
北大核心
2007年第5期125-129,共5页
Highway
关键词
沥青混合料
疲劳损伤
非线性演化
试验研究
asphalt mixture
fatigue damage
nonlinear evolution equation
experimental research
