FATIGUE PERFORMANCE TESTING AND ANALYSIS OF CRANE GIRDERS FOR A STEEL MAKING PLANT
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摘要: 以某炼钢厂房吊车梁疲劳性能应力测试结果为例,结合有限元模拟,对钢吊车梁的疲劳性能进行分析。结果表明:钢吊车梁腹板截面突变处应力集中现象明显,构件疲劳性能严重;随着生产技术的进步,冶金工厂吊车运行频繁程度的大幅度提升,GB500172003《钢结构设计规范》对欠载效应等效系数的取值较实际情况偏低,建议将炼钢厂房重级工作制软钩吊车的欠载效应系数调整到0.9,以保证吊车梁的疲劳寿命。Abstract: It was carried out an analysis of fatigue performance of crane girder using FE simulation according to the result of fatigue performance stress testing of crane girder for a steel plant. The result indicate that stress concentration is obvious on the mutation section of the crane girder and fatigue performance is serious. With the advances in production technology, the cranes are increasing the frequency of operation which will make the under-load effect coefficient increase significantly. The value in the existing Code of Design of Steel Structures (GB 500172003) may be is lower than that of the actual situation, leading to insecurity. Therefore, it was recommended that 0.9 should be taken as the value of under-load effect coefficient for the heavy duty work system of crane hook in order to ensure the fatigue security of crane girders.
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Key words:
- steel crane girder /
- under-load effect coefficient /
- stress test /
- finite element analysis /
- fatigue
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幸坤涛.在役钢结构吊车梁疲劳可靠性与安全控制研究[D].大连: 大连理工大学,2002. [2] 杨建平.冶金工厂重级工作制钢吊车梁欠载效应等效系数的取值[J].建筑结构,2009,39(1):78-79. [3] 路志浩,徐峰,何庆祥.变截面吊车梁圆弧式和直角式突变支座的受力性能分析[J].结构工程师,2010,26(1):22-27. [4] 杨建平,常好诵,王新泉.钢柱吊车肢柱头的疲劳破坏[J].建筑结构,2002,32(9):24-26. [5] GB 500172003 钢结构设计规范[S]. [6] YB 925796 钢结构检测评估与加固技术规程[S].
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