Reliability index and partial factors for fatigue design of steel crane girders

被引：0
|
作者：
Pan C. [1 ,2 ]
Tong L. [1 ,2 ]
机构：
[1] State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai
[2] College of Civil Engineering, Tongji University, Shanghai
来源：
| 1600年 / Science Press卷 / 37期
关键词：
High-cycle fatigue; Limit state design method; Partial factor; Reliability index; Steel crane girder;
D O I：
10.14006/j.jzjgxb.2016.07.010
中图分类号：
学科分类号：
摘要：
The definition of fatigue failure limit state for steel structures was given. The statistical parameters of both fatigue strength and fatigue load effect were analyzed on the basis of both literature investigation and site tests for fatigue load effect of steel crane girders. First-order second-moment method was used to calculate the fatigue reliability index. The values of partial factors for fatigue reliability design were investigated. It is concluded that fatigue strength standard deviations for twelve kinds of structural details (including influence of stress ratio) in steel crane girders are in the range of 0.025 1 to 0.079 2, and the standard deviation of equivalent stress range is 0.014 8 when its probability distribution follows lognormal distribution. The following design values are suggested: 2.9 for the fatigue reliability index, 1.0 for the partial factor of fatigue strength and 1.14 for the partial factor of fatigue load effect, respectively. © 2016, Editorial Office of Journal of Building Structures. All right reserved.
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页码：82 / 88
页数：6
相关论文
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