| 沥青路面荷载型竖向反射裂缝疲劳断裂分析 |
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| 引用本文： | 元松,谈至明.沥青路面荷载型竖向反射裂缝疲劳断裂分析[J].同济大学学报(自然科学版),2007,35(10):1352-1357. |
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| 作者姓名： | 元松 谈至明 |
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| 作者单位： | 同济大学,道路与交通工程教育部重点实验室,上海,200092 |
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| 摘 要： | 根据疲劳断裂理论,分析了车辆荷载作用下半刚性基层开裂处沥青面层反射裂缝的形成机理,指出了在反射裂缝扩展过程中,荷载作用位置、层间结合状态、边界效应、材料参数等对应力强度因子的影响规律,并且建立了各结构参数下应力强度因子对裂缝扩展拟合参数的RBF(径向基函数)神经网络模型.最后,采用广义Paris公式,对路面剩余寿命进行了预估及分析.
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| 关 键 词： | 反射裂缝 疲劳断裂 应力强度因子 径向基函数 |
| 文章编号： | 0253-374X（2007）10-1352-06 |
| 修稿时间： | 2006-05-09 |
Analysis of Fatigue Fracture on Vertical Reflective Crack Under Traffic Load on Asphalt Pavement |
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| YUAN Song,TAN Zhiming.Analysis of Fatigue Fracture on Vertical Reflective Crack Under Traffic Load on Asphalt Pavement[J].Journal of Tongji University(Natural Science),2007,35(10):1352-1357. |
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| Authors: | YUAN Song TAN Zhiming |
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| Institution: | Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China |
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| Abstract: | The theory of fatigue fracture is adopted to analyze the asphalt pavement under traffic load when reflective crack appeared in the bottom of semirigid base.The impacts of loading location,bonded states,boundary effect,material parameters on the stress intensify factor(SIF) are presented.Then,radial basic function(RBF) neural net is established to simulate the fitting parametersof stress intensify factor and crack lengths of lots of pavement construction.Finally,the residual life of pavement is predicted on the basis of generalized Paris formula. |
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| Keywords: | reflective crack fatigue fracture stress intensify factor radial basic function |
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