| 沥青路面结构两阶段寿命预估 |
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| 引用本文： | 范安俊,黄晓明,王宏畅.沥青路面结构两阶段寿命预估[J].水运科技信息,2009(4):72-74. |
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| 作者姓名： | 范安俊 黄晓明 王宏畅 |
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| 作者单位： | 东南大学交通学院,南京210096 |
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| 摘 要： | 基于传统疲劳强度理论，用修正系数的方法来估计裂缝扩展阶段的寿命没有任何的理论依据。提出两阶段方法预估沥青路面结构的疲劳寿命，运用有限元方法对沥青路面进行疲劳断裂分析，研究沥青路面裂缝的扩展规律。
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| 关 键 词： | 疲劳寿命 两阶段 裂缝扩展 应力强度因子 |
Two-stage Life Predict of Asphalt Pavement |
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| Fan Anjun,Huang Xiaoming,Wang Hongchang.Two-stage Life Predict of Asphalt Pavement[J].Transportation Science & Technology,2009(4):72-74. |
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| Authors: | Fan Anjun Huang Xiaoming Wang Hongchang |
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| Institution: | (Transportation College of Southeast University, Nanjing 210096, China) |
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| Abstract: | Based on the traditional fatigue theory, there is no theoretical basis for using the correction factor method to predict the life of crack propagation phase. In this paper, two-stage method is proposed to predict the fatigue life of asphalt pavement. The fatigue rupture of asphalt pavement is analyzed with finite element method andthe crack propagate law of pavement is studied. In the crack appearance phase fatigue law gained from the laboratory tests is used, meanwhile in the crack propagation phase, fatigue law of crack propagation based on Fracture Mechanics is used. Two-stage method can be used to guide the asphalt pavement design and explore ways to lengthen the pavement service life in practice. |
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| Keywords: | fatigue life two-stage crack propagation stress intensity factor |
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