DOI: 10.3724/SP.J.1249.2018.01039

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2018/35:1 PP.39-47

Comparison of two dimensional and three dimensional modeling methods on the mechanical response of asphalt pavement

In order to quantify the differences between the two dimensional (2D) and the three dimensional (3D) finite element models of asphalt pavement, we establish the two kinds of models based on the finite element method under the consideration of the single static load and dynamic load. The displacement and stress spatial distribution characteristics of three kinds of typical asphalt pavement including the rigid pavement, the semi-rigid pavement and the flexible pavement, are analyzed. The numerical results of 2D modelling and 3D modelling on the displacement and stress are compared by combining the double tail significance test. The results show that the displacement of 2D model is over 15 times more than that of 3D model under static load, and it is 22 times more than that of 3D model under dynamic load. The stress of 2D model is 1.2~5.1 times of the stress of 3D model under static load and 2.6~11.9 times under the dynamic load. There is no significant difference between vertical stress and shear stress on the cross section under static load combined with the double tail significance level, and at this time the three-dimensional pavement structure can be simplified to two-dimensional plane.

Key words:road engineering,asphalt pavement,two dimensional model,three dimensional model,mechanical response,finite element method

ReleaseDate:2018-03-20 15:26:55

[1] 彭妙娟, 赵文宣. 层间接触对沥青路面抗车辙性能的影响[J]. 公路交通科技, 2016,33(7):1-6. PENG Miaojuan, ZHAO Wenxuan. Influence of interlayer contact on anti-rutting performance of asphalt pavement[J]. Journal of Highway and Transportation Research and Development, 2016, 33(7):1-6.(in Chinese)

[2] 马国存. 竖向移动荷载作用下沥青路面结构体系响应研究[D]. 长沙:中南大学, 2009. MA Guocun. Study on response of asphalt pavement structure system under vertical moving load[D]. Changsha:Central South University, 2009.(in Chinese)

[3] BUTTLAR W G. Application of graded finite elements for asphalt pavements[J]. Journal of Engineering Mechanics, 2006,132(3):240-249.

[4] 金光来. 基于扩展有限元的沥青路面疲劳开裂行为的数值研究[D]. 南京:东南大学, 2015. JIN Guanglai. Numerical analysis of fatigue crack growth in asphalt pavement based on extended finite element model[D]. Nanjing:School of Transportation Southeast University, 2015.(in Chinese)

[5] 胡小弟, 孙立军, 刘兆金. 沥青路面非均布荷载下层间接触条件不同时力学响应的三维有限元分析[J]. 公路交通科技, 2003,20(3):1-4. HU Xiaodi, SUN Lijun, LIU Zhaojin. Stress response analysis of asphalt pavement with different interlayer touch types under non-uniform distributed tire pressure through 3D finite element method[J]. Journal of Highway and Transportation Research and Development, 2003, 20(3):1-4.(in Chinese)

[6] 侯静. 基于动荷载仿真的路面结构响应分析[J]. 河北工业大学学报, 2016,45(1):114-118. HOU Jing. Pavement structural mechanics based on the dynamic load simulation[J]. Journal of Hebei University of Technology, 2016, 45(1):114-118.(in Chinese)

[7] 谢水友, 郑传超. 轮胎接触压力对沥青路面结构的影响[J]. 长安大学学报自然科学版, 2004,24(1):12-16. XIE Shuiyou, ZHENG Chuanchao. Effects of tire contact pressure on asphalt pavement structure[J]. Journal of Chang'an University Natural Science, 2004, 24(1):12-16.(in Chinese)

[8] HUA E J, WHITE P A H T. A study of nonlinear tire contact pressure effects on HMA rutting[J]. International Journal of Geomechanics, 2002, 2(3):353-376.

[9] 李新贺. 沥青路面不同层间接触状态对路面结构受力的响应研究[D]. 西安:长安大学, 2012. LI Xinhe. Merchanical response of asphalt pavement under different contact condition among interfacials[D]. Xi'an:Chang'an University, 2012.(in Chinese)

[10] 黄仰贤. 路面分析与设计[M]. 北京:人民交通出版社, 1998. HUANG Yangxian. Pavement analysis and design[M]. Beijing:People Communications Press,1998.(in Chinese)

[11] 陈洪兴. 基于路面平整度时域模型的沥青路面车辙计算方法研究[D]. 重庆:重庆交通大学, 2008. CHEN Hongxing. Study on the method to calculate the rutting of asphalt pavement based on the time domain model of roughness[D]. Chongqing:Chongqing Jiaotong University, 2008.(in Chinese)

[12] 广东省公路路面典型结构应用技术指南[Z]. 广州:广东省交通运输厅,2008. Guangdong Province highway pavement typical structure application technical guide[Z]. Guangzhou:Guangdong Provincial Department of Transportation, 2008.(in Chinese)

[13] 肖川, 邱延峻, 黄兵. 基于车辆加载试验的沥青路面动力响应分析[J]. 公路交通科技, 2014,31(12):12-19. XIAO Chuan, QIU Yanjun, HUANG Bing. Analysis on dynamic response of asphalt pavement based on vehicle loading test[J]. Journal of Highway and Transportation Research and Development, 2014, 31(12):12-19.(in Chinese)

[14] 谢平, 唐亚松, 李彬彬, 等. 基于相关系数的水文趋势变异分级方法[J]. 应用基础与工程科学学报, 2014, 22(6):1089-1097. XIE Ping, TANG Yasong, LI Binbin, et al. Classification method of hydrological trend variation based on correlation coefficient[J]. Journal of Basic Science and Engineering, 2014, 22(6):1089-1097.(in Chinese)