为探讨沥青道路反射裂缝疲劳扩展对邻近裂纹的影响,本文基于ABAQUS软件构建了含多个初始裂纹的道路结构二维模型,借助软件中的扩展有限元法(extended finite element method,XFEM)对模型施加车辆-温缩耦合荷载,分析在不同长度、不同间距下裂纹在疲劳扩展过程中的动态响应,同时探讨车辆荷载在耦合荷载中的作用.结果表明:道路中预设裂纹长度越长,与疲劳扩展裂缝的间距越小,疲劳扩展对裂纹开裂的促进作用越显著;车辆荷载促进疲劳裂缝的扩展,并促使裂缝的动态疲劳开裂模式由张开型向剪切型转变.
In order to investigate the effect of fatigue propagation of reflection cracks on nearby cracks in asphalt roads, this paper uses ABAQUS software to construct a two-dimensional model of road structures with multiple initial cracks. By means of the extended finite element method(XFEM)in the software, the model is subjected to vehicle-thermal shrinkage coupling loads to analyze the dynamic response of cracks at different lengths and distances during the fatigue propagation process, simultaneously analyzing the role of vehicle loads in coupled loads. The results show that the longer the length of the cracks, the smaller the distance between the preset cracks and fatigue propagation cracks in the road, and the more significant the promoting effect of fatigue propagation on crack cracking. Vehicle loads significantly the propagation of fatigue cracks, and facilitate the transformation of cracks from open type cracking to shear type cracking.
[1] 白琦峰.半刚性基层沥青路面反射裂缝防治措施对比研究[D].南京: 东南大学, 2005.
[2] Chen A Q, Zhao Y L, Li P B, et al. Crack propagation prediction of asphalt pavement after maintenance as a function of initial cracks distribution[J]. Constr Build Mater, 2020, 231: 117157. DOI:10.1016/j.conbuildmat.2019.117157.
[3] 马宏岩.AASHTO沥青路面低温开裂预估模型的验证与改进[D].哈尔滨: 哈尔滨工业大学, 2011.
[4] 王威娜,周圣雄,秦煜,等.室内反射裂缝试验方法研究进展[J].材料导报, 2022, 36(5): 79-88. DOI:10.11896/cldb.20090234.
[5] Wang G Q, Wang X Q, Yan Z Y, et al. Analysis of the influence of temperature field on the dynamic modulus of rubber asphalt pavement[J]. Front Mater, 2020, 7: 586457. DOI:10.3389/fmats.2020.586457.
[6] Liu Y, Xu X N, Huang Z R, et al. Discrete-continuous coupling simulation and analysis for asphalt pavement dynamic stress responses under a moving wheel load[J]. Case Stud Constr Mater, 2023, 18: e01932. DOI:10.1016/j.cscm.2023.e01932.
[7] Swarna S T, Reddy K S, Reddy M A, et al. Analysis of stresses due to traffic and thermal loads in two-lift bonded concrete pavements by finite element method[J]. Adv Civ Eng Mater, 2018, 7(2): 207-222. DOI:10.1520/acem20170028.
[8] Jiang J W, Dong Q, Ni F J, et al. Development of permanent deformation master curves of asphalt mixtures by load-temperature superposition[J]. J Mater Civ Eng, 2018, 30(6): 04018098. DOI:10.1061/(asce)mt.1943-5533.0002300.
[9] Ling J M, Wei F L, Gao J H, et al. New test method for measuring reflective cracking in hot-mix asphalt overlay pavements[J]. Transp Res Rec J Transp Res Board, 2019, 2673(6): 327-336. DOI:10.1177/0361198119841040.
[10] Lancaster I M, Khalid H A, Kougioumtzoglou I A. Extended FEM modelling of crack propagation using the semi-circular bending test[J]. Constr Build Mater, 2013, 48: 270-277. DOI:10.1016/j.conbuildmat.2013.06.046.
[11] Ban H, Im S, Kim Y R. Mixed-mode fracture characterization of fine aggregate mixtures using semicircular bend fracture test and extended finite element modeling[J]. Constr Build Mater, 2015, 101: 721-729. DOI:10.1016/j.conbuildmat.2015.10.083.
[12] Wang X Y, Li K, Zhong Y, et al. XFEM simulation of reflective crack in asphalt pavement structure under cyclic temperature[J]. Constr Build Mater, 2018, 189: 1035-1044. DOI:10.1016/j.conbuildmat.2018.08.202.
[13] 苏毅,陈庆远. 基于扩展有限元法数值模拟双材料界面裂纹问题[J].应用力学学报, 2023, 40(6): 1308-1314. DOI:10.11776/j.issn.1000-4939.2023.06.011.
[14] 光同文.半刚性基层温缩裂缝控制措施的研究[J].合肥工业大学学报(自然科学版), 2003, 26(1): 127-132. DOI:10.3969/j.issn.1003-5060.2003.01.028.
[15] 张宏君.基于路用要求的半刚性基层抗裂评价与改善措施研究[D].西安: 长安大学, 2009.
[16] 张兰峰,庞立果.沥青混凝土小梁开裂损伤影响因素分析[J].公路交通科技,2019, 36(1): 87-93, 142. DOI:10.3969/j.issn.1002-0268.2019.01.012.
[17] 沈庆.基于XFEM的半刚性基层沥青路面反射裂缝疲劳扩展研究[D].长沙: 湖南大学, 2018. (
