| 多级变幅荷载作用下的横张预应力砼梁疲劳剩余寿命估算 |
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| 引用本文： | 郑怡,向阳开,周志祥,王涛.多级变幅荷载作用下的横张预应力砼梁疲劳剩余寿命估算[J].重庆交通大学学报(自然科学版),2005,24(6):51-54. |
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| 作者姓名： | 郑怡 向阳开 周志祥 王涛 |
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| 作者单位： | 重庆交通学院,土木建筑学院,重庆,400074;贵州路桥总公司,贵州贵阳,550000 |
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| 基金项目： | 交通部优秀青年专业技术人才专项基金
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教育部科学技术研究项目 |
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| 摘 要： | 在研究传统的疲劳寿命及疲劳强度估算方法的基础上,应用Bui Quoc.T非线性累积损伤法则,推导出横张预应力砼梁的疲劳寿命的计算公式,并对其中的受损态的无量纲疲劳持久限瞬时值难确定的问题,结合数学知识和利用计算机编程,求解出m.同时,通过实例计算结果与实验数据的比较,验证了公式的正确性.
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| 关 键 词： | 横张预应力砼 疲劳寿命 损伤度 寿命循环分数 |
| 文章编号： | 1001-716X(2005)06-0051-04 |
| 修稿时间： | 2004年9月20日 |
The method on estimating fatigue surplus life of transversely tensioned prestressed concrete in the loading of mutil-leveling changing scope |
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| ZHENG Yi,XIANG Yang-kai,ZHOU Zhi-xiang,WANG Tao.The method on estimating fatigue surplus life of transversely tensioned prestressed concrete in the loading of mutil-leveling changing scope[J].Journal of Chongqing Jiaotong University,2005,24(6):51-54. |
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| Authors: | ZHENG Yi XIANG Yang-kai ZHOU Zhi-xiang WANG Tao |
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| Abstract: | Comparing with the estimating method of fatigue life and fatigue strength in the past, It is deduced that the formula of fatigue life of transversely tensioned prestressed concrete. To the problem that it is difficult for determining damaged fatigue lasting limit instantaneous value with no unit in the formula, m is determined, combining with mathematics and writing program, so the difficulty mentioned is avoided. And it is computed that the part of data from fatigue tests of transversely tensioned prestressed concrete, and reasonable result is gained. So correction of the formula is verified. |
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| Keywords: | transversely tensioned prestressed concrete fatigue life degree of damage cyclic life percent |
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