基于耗散能相对变化率平稳值的橡胶沥青混合料疲劳寿命预测方法
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摘要
针对AC-13I型橡胶沥青混合料开展三点弯曲疲劳试验,并采用耗散能相对变化率定义损伤变量进行损伤演化过程分析;建立了这类混合料的耗散能、耗散能相对变化率与疲劳次数的关系式,以及基于耗散能相对变化率平稳值的疲劳方程.结果表明:AC-13I型橡胶沥青混合料的疲劳寿命随其耗散能相对变化率平稳值的增大呈幂函数趋势下降,根据建立的疲劳方程预测的疲劳寿命与实际疲劳寿命相对误差平均值为9.33%,说明所建立的疲劳方程能很好地预测AC-13I型橡胶沥青混合料的疲劳寿命;经验证,上述关系式以及疲劳方程同样适用于基质沥青混合料.
The three-point bending fatigue tests of AC-13 I rubber asphalt mixture were carried out. The dissipated energy ratio(DER) was used to define damage variable and the damage evolution process was analyzed. The relations between dissipated energy(DE) and DER, and fatigue cycle number of the asphalt mixture were established. The fatigue equation based on the plateau value(PV) of DER was established too. The results show that the fatigue life decreases in power function with the increase of PV. The average relative error of the fatigue life predicted by the fatigue equation and the actual fatigue life is 9.33%, which indicates that the established fatigue equation can well predict the fatigue life of AC-13 I rubber asphalt mixture. It is verified that the established relations and fatigue equation are also applicable to base asphalt mixture.
The three-point bending fatigue tests of AC-13 I rubber asphalt mixture were carried out. The dissipated energy ratio(DER) was used to define damage variable and the damage evolution process was analyzed. The relations between dissipated energy(DE) and DER, and fatigue cycle number of the asphalt mixture were established. The fatigue equation based on the plateau value(PV) of DER was established too. The results show that the fatigue life decreases in power function with the increase of PV. The average relative error of the fatigue life predicted by the fatigue equation and the actual fatigue life is 9.33%, which indicates that the established fatigue equation can well predict the fatigue life of AC-13 I rubber asphalt mixture. It is verified that the established relations and fatigue equation are also applicable to base asphalt mixture.
引文
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[5] 沙炯,邢明亮,张纪阳,等.基于恢复时间的沥青混合料疲劳试验[J].公路,2016(10):217-220.SHA Jiong,XING Mingliang,ZHANG Jiyang,et al.Fatigue test of asphalt mixture based on strain control[J].Highway,2016(10):217-220.(in Chinese)
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[7] 陈伟强.基于耗散能量的沥青混合料疲劳破坏机理研究[D].广州:华南理工大学,2014.CHEN Weiqiang.Research on fatigue failure mechanism of asphalt mixture based on dissipated energy[D].Guangzhou:South China University of Technology,2014.(in Chinese)
[8] GHUZLAN K A,CARPENTER S H.Fatigue damage analysis in asphalt concrete mixtures using the dissipated energy approach[J].Can J Civ Eng,2006,33:890-901.
[9] CARPENTER S H,JANSEN M.Fatigue behavior under new aircraft loading conditions[C]//Aircraft/Pavement Technology:In the Midst of Change.New York:American Society of Civil Engineers,1997:259-271.
[10] SUN Yazhen,FANG Chenze,WANG Jinchang,et al.Method of fatigue-life prediction for an asphalt mixture based on the plateau value of permanent deformation ratio[J].Materials,2018,11(5):1-16.
[11] SUN Yazhen,FANG Chenze,WANG Jinchang,et al.Energy-based approach to predict fatigue life of asphalt mixture using three-point bending fatigue test[J].Materials,2018,11(9):1-12.
[2] HEUKELOM W.Observations on the rheology and fracture of bitumens and asphalt mixes[J].Journal of the Association of Asphalt Paving Technologists,1966,35:359-399.
[3] Van DIJK W,MOREAUD H,QUEDEVILLE A,et al.The fatigue of bitumen and bituminous mixes[C]//Proceedings of the 3rd International Conference on the Structural Design of Asphalt Pavements.Ann Arbor,Michigan:University of Michigan,1972:354-366.
[4] TAYEBALI A A,ROWE G M,SOUSA J B.Fatigue response of asphalt aggregate mixtures[J].Journal of the Association of Asphalt Paving Technologists,1992,61:333-360.
[5] 沙炯,邢明亮,张纪阳,等.基于恢复时间的沥青混合料疲劳试验[J].公路,2016(10):217-220.SHA Jiong,XING Mingliang,ZHANG Jiyang,et al.Fatigue test of asphalt mixture based on strain control[J].Highway,2016(10):217-220.(in Chinese)
[6] LUO Xue,LUO Rong,LYTTON R L.Characterization of asphalt mixtures using controlled-strain repeated direct tension test[J].American Society of Civil Engineers,2013,25(2):194-207.
[7] 陈伟强.基于耗散能量的沥青混合料疲劳破坏机理研究[D].广州:华南理工大学,2014.CHEN Weiqiang.Research on fatigue failure mechanism of asphalt mixture based on dissipated energy[D].Guangzhou:South China University of Technology,2014.(in Chinese)
[8] GHUZLAN K A,CARPENTER S H.Fatigue damage analysis in asphalt concrete mixtures using the dissipated energy approach[J].Can J Civ Eng,2006,33:890-901.
[9] CARPENTER S H,JANSEN M.Fatigue behavior under new aircraft loading conditions[C]//Aircraft/Pavement Technology:In the Midst of Change.New York:American Society of Civil Engineers,1997:259-271.
[10] SUN Yazhen,FANG Chenze,WANG Jinchang,et al.Method of fatigue-life prediction for an asphalt mixture based on the plateau value of permanent deformation ratio[J].Materials,2018,11(5):1-16.
[11] SUN Yazhen,FANG Chenze,WANG Jinchang,et al.Energy-based approach to predict fatigue life of asphalt mixture using three-point bending fatigue test[J].Materials,2018,11(9):1-12.