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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 1999, Vol. 18 ›› Issue (2): 20-26.

• • 上一篇    下一篇

砼材料非线性多级疲劳损伤方程的建立

赵永利1, 孙伟2   

  1. 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
  • 收稿日期:1998-07-18 出版日期:1999-04-20 发布日期:2016-10-31
  • 作者简介:赵永利,男,1971年生,硕士.
  • 基金资助:
    国家自然科学基金资助项目(59372104)

Establishment of the Non-linearity Multistage Fatigue Damage Equation of the Concrete Material

Zhao Yongli1, Sun Wei2   

  1. 1. Department of Transportation Engineering, Southeast University, Nanjing 210096;
    2. Department of Materials Science and Engineering, Southeast University, Nanjing 210096
  • Received:1998-07-18 Online:1999-04-20 Published:2016-10-31

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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.

关键词: 多级疲劳, 损伤, 寿命, 超载

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.

Key words: multistage fatigue, damage, life expectancy, overloading