| 砼材料非线性多级疲劳损伤方程的建立 |
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| 引用本文： | 赵永利,孙伟.砼材料非线性多级疲劳损伤方程的建立[J].重庆交通大学学报(自然科学版),1999,18(2):20-26. |
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| 作者姓名： | 赵永利 孙伟 |
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| 作者单位： | 1. 南京,东南大学交通运输工程系,210096
2. 南京,东南大学材料科学与工程系,210096 |
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| 基金项目： | 国家自然科学基金;59372104; |
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| 摘 要： | 利用损伤力学的基本概念，在砼材料疲劳损伤方程的基础上，对砼材料的多级疲劳损伤过程进行了深入的理论分析，给出了具有独立性和连续性的多级疲劳损伤路径，推导出了砼材料的非线性多级疲劳损伤方程，方程明确的反映了加载次序对疲劳累积寿命的影响；利用此方程，笔者分析了超载对材料使用寿命的影响．
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| 关 键 词： | 多级疲劳 损伤 寿命 超载 |
| 修稿时间： | 1998－07－18 |
Establishment of the Non-linearity Multistage Fatigue Damage Equation of the Concrete Material |
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| Zhao Yongli,Sun Wei.Establishment of the Non-linearity Multistage Fatigue Damage Equation of the Concrete Material[J].Journal of Chongqing Jiaotong University,1999,18(2):20-26. |
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| Authors: | Zhao Yongli Sun Wei |
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| Abstract: | With the basic concept of damage
mechanics and based on the fatigue damage equation of concrete materials,the multistage
fatigue damage process of concrete materials is deeply and theoretically
analyzed.Accordingly the pathway of multistage fatigue damage with the characteristics of
independence and continuance is provided,and the non-linearity multistage fatigue damage
equation of concrete materials is inferred.The equation clearly reflects that the loading
sequence has an effect on the fatigue accumulating life expectancy;with the use of this
equation the effect of overloading on the material life expectancy is analyzed. |
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| Keywords: | multistage fatigue damage life expectancy overloading |
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