基于加速加载的在役沥青混合料损伤与疲劳性能
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摘要
采用足尺加速加载试验模拟了现场沥青路面的在役状态,基于便携式地质地震波模量分析仪和劈裂试验对在役沥青混合料的损伤与疲劳性能进行了研究。结果表明:路面地震波模量随加速加载作用次数的增加而不断降低。基于地震波模量检测结果的频散曲线,分析了路面不同深度处地震波模量的衰变规律,发现下面层沥青混合料的临界损伤位置出现在其上部区域。在役沥青混合料的劈裂强度随加载作用次数的增加总体上略有降低。而加速加载作用对在役沥青混合料疲劳抗力的影响随着路面深度的增加而降低。
Accelerated loading test was carried out on an in-service asphalt pavement to study the damage and failure performance of in-service asphalt mixture using Portable Seismic Property Analyzer(PSPA)and indirect tensile test.The PSPA moduli of in-service asphalt mixture decreases with the increase in the accelerated loading passes.Based on the dispersion curves of PSPA test results,the relationship between the PSPA moduli at different pavement depth and accelerated loading passes was analyzed.It was found that the critical damage position of the bottom course of the asphalt layer appeared at the top area.According to the lab test results,the indirect tensile strength of the inservice asphalt mixture slightly decreases with the increase in the accelerated loading passes.With the increase in pavement depth the influence of the accelerated loading passes on fatigue resistance of the in-service asphalt mixture becomes weak.
Accelerated loading test was carried out on an in-service asphalt pavement to study the damage and failure performance of in-service asphalt mixture using Portable Seismic Property Analyzer(PSPA)and indirect tensile test.The PSPA moduli of in-service asphalt mixture decreases with the increase in the accelerated loading passes.Based on the dispersion curves of PSPA test results,the relationship between the PSPA moduli at different pavement depth and accelerated loading passes was analyzed.It was found that the critical damage position of the bottom course of the asphalt layer appeared at the top area.According to the lab test results,the indirect tensile strength of the inservice asphalt mixture slightly decreases with the increase in the accelerated loading passes.With the increase in pavement depth the influence of the accelerated loading passes on fatigue resistance of the in-service asphalt mixture becomes weak.
引文
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[15]Azari H,Nazarian S,Yuan D.Assessing sensitivity of impact echo and ultrasonic surface waves methods for nondestructive evaluation of concrete structures[J].Construction&Building Materials,2014,71(71):384-391.
[2]Yeo I,Suh Y,Mun S,et al.Development of a remaining fatigue life model for asphalt black base through accelerated pavement testing[J].Construction&Building Materials,2008,22(8):1881-1886.
[3]Zou J,Roque R,Byron T.Effect of HMA ageing and potential healing on top-down cracking using HVS[J].Road Materials&Pavement Design,2012,13(3):518-533.
[4]陈少幸,张肖宁,孟书涛,等.基于ALF加速加载试验的沥青层疲劳损伤[J].公路交通科技,2012,29(1):18-22.Chen Shao-xing,Zhang Xiao-ning,Meng Shu-tao,et al.Fatigue damage in asphalt layer based on ALF accelerated loading test[J].Journal of Highway and Transportation Research and Development,2012,29(1):18-22.
[5]Celaya M,Nazarian S.Seismic testing to determine quality of hot-mix asphalt[J].Transportation Research Record Journal of the Transportation Research Board,2006,1946(1):113-122.
[6]Wu J,Ye F,Wu Y.Modulus evolution of asphalt pavement based on full-scale accelerated pavement testing with Mobile Load Simulator 66[J].International Journal of Pavement Engineering,2015,16(7):609-619.
[7]彭勇,孙立军,石永久,等.沥青混合料劈裂强度的影响因素[J].吉林大学学报:工学版,2007,37(6):1304-1307.Peng Yong,Sun Li-jun,Shi Yong-jiu,et al.Factors affecting splitting strength of asphalt mixture[J].Journal of Jilin University(Engineering and Technology Edition),2007,37(6):1304-1307.
[8]陆学元,孙立军.AC-13改性沥青混合料劈裂强度的影响因素及其与马歇尔性能指标的相关性[J].吉林大学学报:工学版,2010,40(3):676-682.Lu Xue-yuan,Sun Li-jun.Factors affecting splitting strength for AC-13 modified asphalt mixture and Marshall performance standard correlation[J].Journal of Jilin University(Engineering and Technology Edition),2010,40(3):676-682.
[9]许志鸿,李淑明,高英,等.沥青混合料疲劳性能研究[J].交通运输工程学报,2001,1(1):20-24.Xu Zhi-hong,Li Shu-ming,Gao Ying,et al.Research on fatigue characteristic of asphalt mixture[J].Journal of Traffic and Transportation Engineering,2001,1(1):20-24.
[10]中华人民共和国交通运输部公路科学研究所.JTJ052-2000公路工程沥青及沥青混合料试验规程[S].
[11]Castro M,Sánchez J A.Estimation of asphalt concrete fatigue curves-a damage theory approach[J].Construction&Building Materials,2008,22(6):1232-1238.
[12]孙立军.沥青路面结构行为学[M].上海:同济大学出版社,2013.
[13]Nazarian S,Alvarado G.Impact of temperature gradient on modulus of asphaltic concrete layers[J].Journal of Materials in Civil Engineering,2006,18(4):492-499.
[14]Nazarian S,Desai M.Automated surface wave method:field testing[J].Journal of Geotechnical Engineering,1993,119(7):1094-1111.
[15]Azari H,Nazarian S,Yuan D.Assessing sensitivity of impact echo and ultrasonic surface waves methods for nondestructive evaluation of concrete structures[J].Construction&Building Materials,2014,71(71):384-391.