| 在役钢筋混凝土结构基于可靠性的疲劳寿命分析 |
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| 引用本文： | 赵尚传, 赵国藩, 贡金鑫. 在役钢筋混凝土结构基于可靠性的疲劳寿命分析[J]. 工程力学, 2002, 19(4): 7-11. |
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| 作者姓名： | 赵尚传 赵国藩 贡金鑫 |
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| 作者单位： | 大连理工大学海岸与近海工程国家重点试验室, 辽宁, 大连, 116023 |
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| 基金项目： | 国家自然科学基金资助项目(59878008和50078009) |
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| 摘 要： | 本文以结构的极限疲劳循环次数作为随机变量,基于可靠性理论提出了在役结构疲劳剩余寿命的预测方法,分析了多种工况下结构在未来服役期内的疲劳可靠性和疲劳剩余寿命。算例表明,通过对在役结构疲劳寿命及可靠性的分析,不仅可以预测在目标可靠度下的疲劳寿命,而且可以根据需要确定合适的交变荷载的频率、服役时间以及相应的疲劳可靠指标,从而为结构的合理利用起指导性作用。
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| 关 键 词： | 在役钢筋混凝土结构 疲劳寿命 可靠性 |
| 文章编号： | 1000-4750(2002)04-007-05 |
| 收稿时间： | 2000-12-23 |
| 修稿时间： | 2001-11-30 |
ANALYSIS OF FATIGUE LIFE OF EXISTING REINFORCED CONCRETE STRUCTURES BASED ON RELIABILITY THEORY |
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| ZHAO Shang-chuan, ZHAO Guo-fan, GONG Jin-xin. ANALYSIS OF FATIGUE LIFE OF EXISTING REINFORCED CONCRETE STRUCTURES BASED ON RELIABILITY THEORY[J]. Engineering Mechanics, 2002, 19(4): 7-11. |
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| Authors: | ZHAO Shang-chuan ZHAO Guo-fan GONG Jin-xin |
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| Affiliation: | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116023 China |
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| Abstract: | In this paper, a method to analyze remaining fatigue life for existing concrete structures is proposed based on reliability theory, in which the number of fatigue-critical cycles under stress ranges is taken as a random variable. The fatigue reliability and remaining fatigue life in different circumstances are studied. It is shown that this method is not only suitable to predicting useful remaining fatigue life with predetermined reliability index but also convenient to calculate corresponding fatigue reliability value with existing or specified frequency of varying loads in a certain service time. The results are instructive for structures in use. |
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| Keywords: | existing reinforced concrete structure fatigue life reliability |
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