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| 高等级沥青路面基层底裂缝扩展规律 | |
| 引用本文： | 王宏畅,李国芬,侯曙光,黄晓明.高等级沥青路面基层底裂缝扩展规律[J].南京林业大学学报(自然科学版),2007,31(2):78-82. |
| 作者姓名： | 王宏畅 李国芬 侯曙光 黄晓明 |
| 作者单位： | 1. 南京林业大学土木工程学院,江苏,南京,210037 2. 南京工业大学土木工程学院,江苏,南京,210009 3. 东南大学交通学院,江苏,南京,210096 |
| 基金项目： | 南京林业大学高学历人才项日 |
| 摘 要： | 在断裂力学理论基础上,应用有限元软件ABAQUS,采用20结点等参元有限元模型,对路面基层裂缝进行数值计算.并采用P-M准则和Paris公式预测了基层裂缝扩展寿命,分析探讨了应力强度因子K1和K2在基层裂缝扩展过程中的变化规律及路面结构参数对基层疲劳寿命的影响.计算结果真实反映路面结构的现象和规律,可为高等级公路抗裂设计提供依据. |
| 关 键 词： | 沥青路面 基层 裂缝 有限元法 断裂力学 高等级公路 沥青 路面基层 裂缝扩展规律 Course Base Asphalt Pavement Bottom Extension Crack 抗裂设计 现象 路面结构参数 结果真实 数值计算 影响 疲劳寿命 变化规律 扩展过程 力强度因子 |
| 文章编号： | 1000-2006(2007)02-0078-05 |
| 修稿时间： | 2006-01-10 |
Research on Crack Extension at Bottom of Asphalt Pavement Base Course |
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| WANG Hong-chang,LI Guo-fen,HOU Shu-guang,HUANG Xiao-ming.Research on Crack Extension at Bottom of Asphalt Pavement Base Course[J].Journal of Nanjing Forestry University(Natural Sciences ),2007,31(2):78-82. | |
| Authors: | WANG Hong-chang LI Guo-fen HOU Shu-guang HUANG Xiao-ming |
| Institution: | 1. College of Civil Engineering Nanjing Forestry University, Nanjing 210037 ,Chinas2. College of Civil Engineering Nanjing University of Technology,Nanjing 210009,China;3. College of Transportation Southeast University,Nanjing 210096,China |
| Abstract: | A finite element analysis model of 20-node isoparametric elements was established by the commerce FEM software ABAQUS based on the of fracture mechanics theory.The crack at the bottom of the semi-rigid base course was numerically analyzed,and the crack extension life was evaluated by P-M rule and Paris formula.In the course of base crack extension the change of the stress intensity factor(SIF)(K1 and K2) was discussed,and the effect of pavement parameters on base fatigue life was studied.The results reflected that the law of pavement could provide scientific basis for anti-crack design of highway engineering. |
| Keywords: | Asphalt pavement Base course Crack Finite element method Fracture mechanics |
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