| 带裂纹钢吊车梁剩余寿命评估 |
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| 引用本文： | 郭春红,弓俊青,惠云玲,杨建平,汪海,陈秀华.带裂纹钢吊车梁剩余寿命评估[J].钢结构,2010,25(11):15-18. |
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| 作者姓名： | 郭春红 弓俊青 惠云玲 杨建平 汪海 陈秀华 |
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| 作者单位： | 1. 国家工业建筑诊断与改造工程技术研究中心,北京,100088
2. 上海交通大学,上海,200240 |
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| 基金项目： | 科技部科研院所技术开发研究专项资金项目(NCSTE-2006-JKZX-032) |
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| 摘 要： | 论述了钢结构疲劳裂纹计算分析的基本理论,针对工业厂房的重级工作制钢吊车梁,建立了采用非等幅荷载谱对带裂纹钢吊车梁剩余寿命的分析评估方法,计算分析了不同应力幅值及初始裂纹尺寸条件下钢吊车梁剩余疲劳寿命。计算表明:钢吊车梁剩余疲劳寿命受应力幅值大小及裂纹长度影响较大,按照指数形式衰减,受裂纹深度的影响相对较小。采用NASGRO公式可对存在初始裂纹的钢吊车梁进行剩余疲劳寿命评估,效果良好,应用前景广阔。
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| 关 键 词： | 钢吊车梁 疲劳寿命 评估 裂纹 |
ASSESSMENT OF CRANE GIRDER FATIGUE LIFE WITH INITIAL CRACK |
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| Guo Chunhong,Gong Junqing,Hui Yunling,Yang Jianping,Wang Hai,Chen Xiuhua.ASSESSMENT OF CRANE GIRDER FATIGUE LIFE WITH INITIAL CRACK[J].Steel Construction,2010,25(11):15-18. |
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| Authors: | Guo Chunhong Gong Junqing Hui Yunling Yang Jianping Wang Hai Chen Xiuhua |
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| Affiliation: | Guo Chunhong1 Gong Junqing1 Hui Yunling1 Yang Jianping1 Wang Hai2 Chen Xiuhua2 (1.National Engineering Research Center on Diagnosis and Rehabilitation of Industrial Building,Beijing 100088,China,2.Shanghai Jiaotong University,Shanghai 200240,China) |
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| Abstract: | The basic theories of calculation and analysis of the steel structural fatigue cracks were presented.The assessment method for the rest fatigue life of crane girder by adopting the unequal amplitude load spectrum was established.The rest fatigue life of crane girder under the different stress amplitude and initial crack size were calculated and the calculation results showed that the rest fatigue life of crane girder was influenced more by stress amplitude and initial crack length and relatively less by the... |
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| Keywords: | steel crane girder fatigue life assessment crack |
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