沥青混合料粗集料抗疲劳性能
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摘要
为研究AC-13沥青混合料在重复荷载下各挡粗集料的抗疲劳性能,提出反映各挡粗集料特性的沥青混合料等效基体(AC-9.5、AC-4.75、AC-2.36、AC-1.18)概念;通过疲劳过程等效基体的开裂特性,分析各挡集料的抗疲劳能力。建立疲劳过程Miner线性损伤模型,设计不同应力水平的劈裂强度试验和疲劳试验,得出各等效基体劈裂抗拉强度和疲劳寿命。依据损伤模型与疲劳寿命结果,划分沥青混合料及其等效基体不同损伤程度(20%~80%)的疲劳作用次数;定义裂纹贯穿比例,分析不同应力水平等效基体随损伤程度的裂纹贯穿变化规律。结果表明:9.5~13.2 mm集料和4.75~9.5 mm集料对提高AC-13沥青混合料抗疲劳性能的作用大于2.36~4.75 mm和13.2~16 mm集料;通过提高4.75~13.2 mm集料的质量分数可以提高沥青混合料的抗疲劳性能,但提高13.2~16 mm和2.36~4.75 mm集料的质量分数对提高抗疲劳性能作用不明显。
In order to research the resisting fatigue property of each aggregate about AC-13 asphalt mixture in repeated loading,the concept about asphalt mixture equivalent matrix (AC-9.5,AC-4.75,AC-2.36,AC-1.18) that reflects each coarse aggregate property is put forward in this article.By means of equivalent matrix fissure characteristic in the fatigue process,the capacity of resisting fatigue of each aggregate is analyzed.The Miner linear damaged model in fatigue process is established and the splitting strength test and fatigue test with different stress levels is designed,and then the splitting tensile strength and fatigue life of each equivalent matrix is obtained.According to damaged model and fatigue life results,the article divides the asphalt mixture and its equivalent matrix fatigue action times in line with various damaged degree (20% ~ 80%) and defines the crack traversal percentage so that it analyzes the crack traversal rule about the equivalent matrix changing with damaged degree under different stress levels.The result shows that the fatigue incidence of aggregates about9.5 ~ 13.2 mm and 4.75 ~ 9.5 mm in AC-13 asphalt mixture is higher than that of aggregates about 2.36 ~4.75 mm and 13.2 ~ 16 mm.The fatigue resistance ability of asphalt mixture increases by improving the mass fraction of 4.75 ~ 13.2 mm aggregate but it is not obvious for the improvement of the fatigue resistance ability to increase the mass fraction of 13.2 ~ 16 mm and 2.36 ~ 4.75 mm aggregatese.
In order to research the resisting fatigue property of each aggregate about AC-13 asphalt mixture in repeated loading,the concept about asphalt mixture equivalent matrix (AC-9.5,AC-4.75,AC-2.36,AC-1.18) that reflects each coarse aggregate property is put forward in this article.By means of equivalent matrix fissure characteristic in the fatigue process,the capacity of resisting fatigue of each aggregate is analyzed.The Miner linear damaged model in fatigue process is established and the splitting strength test and fatigue test with different stress levels is designed,and then the splitting tensile strength and fatigue life of each equivalent matrix is obtained.According to damaged model and fatigue life results,the article divides the asphalt mixture and its equivalent matrix fatigue action times in line with various damaged degree (20% ~ 80%) and defines the crack traversal percentage so that it analyzes the crack traversal rule about the equivalent matrix changing with damaged degree under different stress levels.The result shows that the fatigue incidence of aggregates about9.5 ~ 13.2 mm and 4.75 ~ 9.5 mm in AC-13 asphalt mixture is higher than that of aggregates about 2.36 ~4.75 mm and 13.2 ~ 16 mm.The fatigue resistance ability of asphalt mixture increases by improving the mass fraction of 4.75 ~ 13.2 mm aggregate but it is not obvious for the improvement of the fatigue resistance ability to increase the mass fraction of 13.2 ~ 16 mm and 2.36 ~ 4.75 mm aggregatese.
引文
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[11]邱延峻,闫常赫,艾长发.非均质沥青混合料劈裂试验全过程数值模拟[J].交通运输工程学报,2009,9(2):12-16.QIU Yanjun,YAN Changhe,AI Changfa.Numerical simulation of split test process for asphalt mixture under heterogeneous state[J].Journal of Traffic and Transportation Engineering,2009,9(2):12-16.
[12]姚莉莉,王选仓.沥青混合料劈裂试验的扩展有限元法数值模拟[J].武汉大学学报(工学版),2011,44(6):748-751.YAO Lili,WANG Xuancang.Numerical simulation on splitting test process of asphalt mixtures based on extended finite element method[J].Engineering Journal of Wuhan University,2011,44(6):748-751.
[13]MATEOS A,AYUSO J.Shift factors for asphalt fatigue from full-scale testing[J].Transportation Research Record,2011,2225:128-136.
[14]董忠红,张扬,吕彭民.拉-压交变荷载下沥青混合料的疲劳性能[J].中国公路学报,2013,26(2):15-19.DONG Zhonghong,ZHANG Yang,LYU Pengmin.Fatigue performance of asphalt mixture under tensile-compressive alternating loading[J].China Journal of Highway and Transport,2013,26(2):15-19.
[15]RASHID K,ABU A,MASOUD K,et al.A micro-damage healing model that improves prediction of fatigue life in asphalt mixes[J].International Journal of Engineering Science,2010(48):966.
[16]交通部公路科学研究院.公路工程沥青及沥青混合料试验规程:JTG E20—2011[S].北京:人民交通出版社,2011.
[17]石立万,王端宜,吴志勇.沥青混合料疲劳裂缝分布特性研究[J].公路,2016(7):260-264.SHI Liwan,WANG Duanyi,WU Zhiyong.Research on fatigue cracks distribution in asphalt mixture[J].Highway,2016(7):260-264.
[18]陈俊,黄晓明.集料分布特性对混合料疲劳性能的影响分析[J].建筑材料学报,2009,12(4):442-447.CHEN Jun,HUANG Xiaoming.Research on influence of distribution characteristics of aggregate on fatigue performance of asphalt mixture[J].Journal of Building Materials,2009,12(4):442-447.
[19]胡霞光.沥青混合料微观力学分析综述[J].长安大学学报(自然科学版),2005,25(2):6-9.HU Xiaguang.Review on asphalt mixture micromechanics analysis[J].Journal of Chang'an University(Natural Science Edition),2005,25(2):6-9.
[20]MORENO C,RUBIO M.Effect of aggregate nature on the fatigue-cracking behavior of asphalt mixes[J].Materials and Design,2013,47:61-67.
[2]黄卫东,郑茂,黄明.多种沥青混合料疲劳性能的比较[J].建筑材料学报,2015,18(6):1089-1094.HUANG Weidong,ZHENG Mao,HUANG Ming.Fatigue performance comparison of various kinds of asphalt mixture[J].Journal of Building Materials,2015,18(6):1089-1094.
[3]黄明,温学钧,黄卫东,等.不同设计目标下沥青混合料的疲劳性能[J].同济大学学报(自然科学版),2016,44(4):572-579.HUANG Ming,WEN Xuejun,HUANG Weidong,et al.Fatigue performance of asphalt mixtures with different design goals[J].Journal of Tongji University(Natural Science),2016,44(4):572-579.
[4]吕松涛,陈杰.基于加速加载试验的沥青混合料刚度衰变规律研究[J].公路交通科技,2016,33(5):1-6.LYU Songtao,CHEN Jie.Study on stiffness decay regularity of asphalt mixture based on accelerated loading test[J].Journal of Highway and Transportation Research and Development,2016,33(5):1-6.
[5]郑健龙,吕松涛.沥青混合料非线性疲劳损伤模型[J].中国公路学报,2009,22(5):21-28ZHENG Jianlong,LYU Songtao.Nonlinear fatigue damage model for asphalt mixtures[J].China Journal of Highway and Transport,2009,22(5):21-28.
[6]栾利强,田小革.沥青混合料疲劳损伤的非线性分析[J].建筑材料学报,2012,15(4):508-512.LUAN Liqiang,TIAN Xiaoge.Non-linear analysis of fatigue damage of asphalt mixture[J].Journal of Building Materials,2012,15(4):508-512.
[7]李波,李涛,滕旭秋,等.基于集料分形特征的沥青混合料配合比设计[J].武汉理工大学学报,2008,30(12):50-53.LI Bo,LI Tao,TENG Xuqiu,et al.Mix design method for asphalt mixtures based on the fractal characteristic of aggregate[J].Jounal of Wuhan University of Technology,2008,30(12):50-53.
[8]吕松涛,郑健龙.宽应力比条件下的沥青混合料疲劳特性:改进的S-N模型[J].公路交通科技,2011,28(8):1-6.LYU Songtao,ZHENG Jianlong.Fatigue properties of asphalt mixtures under broad stress ratio conditions:improved S-N model[J].Journal of Highway and Transportation Research and Development,2011,28(8):1-6.
[9]PROWELL B.Estimate of fatigue shift factors between laboratory tests and field performance[J].Transportation Research Record,2010,2181:117-124.
[10]马林,张肖宁.基于间接拉伸试验模式的沥青混合料动态模量[J].华南理工大学学报(自然科学版),2008,36(10):86-91.MA Lin,ZHANG Xiaoning.Dynamic modulus of asphalt mixture based on indirect tensile test mode[J].Journal of South China University of Technology(Natural Science Edition),2008,36(10):86-91.
[11]邱延峻,闫常赫,艾长发.非均质沥青混合料劈裂试验全过程数值模拟[J].交通运输工程学报,2009,9(2):12-16.QIU Yanjun,YAN Changhe,AI Changfa.Numerical simulation of split test process for asphalt mixture under heterogeneous state[J].Journal of Traffic and Transportation Engineering,2009,9(2):12-16.
[12]姚莉莉,王选仓.沥青混合料劈裂试验的扩展有限元法数值模拟[J].武汉大学学报(工学版),2011,44(6):748-751.YAO Lili,WANG Xuancang.Numerical simulation on splitting test process of asphalt mixtures based on extended finite element method[J].Engineering Journal of Wuhan University,2011,44(6):748-751.
[13]MATEOS A,AYUSO J.Shift factors for asphalt fatigue from full-scale testing[J].Transportation Research Record,2011,2225:128-136.
[14]董忠红,张扬,吕彭民.拉-压交变荷载下沥青混合料的疲劳性能[J].中国公路学报,2013,26(2):15-19.DONG Zhonghong,ZHANG Yang,LYU Pengmin.Fatigue performance of asphalt mixture under tensile-compressive alternating loading[J].China Journal of Highway and Transport,2013,26(2):15-19.
[15]RASHID K,ABU A,MASOUD K,et al.A micro-damage healing model that improves prediction of fatigue life in asphalt mixes[J].International Journal of Engineering Science,2010(48):966.
[16]交通部公路科学研究院.公路工程沥青及沥青混合料试验规程:JTG E20—2011[S].北京:人民交通出版社,2011.
[17]石立万,王端宜,吴志勇.沥青混合料疲劳裂缝分布特性研究[J].公路,2016(7):260-264.SHI Liwan,WANG Duanyi,WU Zhiyong.Research on fatigue cracks distribution in asphalt mixture[J].Highway,2016(7):260-264.
[18]陈俊,黄晓明.集料分布特性对混合料疲劳性能的影响分析[J].建筑材料学报,2009,12(4):442-447.CHEN Jun,HUANG Xiaoming.Research on influence of distribution characteristics of aggregate on fatigue performance of asphalt mixture[J].Journal of Building Materials,2009,12(4):442-447.
[19]胡霞光.沥青混合料微观力学分析综述[J].长安大学学报(自然科学版),2005,25(2):6-9.HU Xiaguang.Review on asphalt mixture micromechanics analysis[J].Journal of Chang'an University(Natural Science Edition),2005,25(2):6-9.
[20]MORENO C,RUBIO M.Effect of aggregate nature on the fatigue-cracking behavior of asphalt mixes[J].Materials and Design,2013,47:61-67.