吊车桁架铆接节点板疲劳强度验算
- 摘 要
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幸坤涛1 杨建平2 陈 超3 常好诵2（1 大连理工大学土建学院结构研究室 116023； 2 国家工业建筑诊断与改造工程技术研究中心 北京 100088； 3 上海宝钢集团上海五钢有限公司 200940）
[提要] 利用有限元方法对某钢吊车桁架节点板进行了计算分析，并与现场实测应力结果进行了对比。在此基础上，确定了节点板疲劳计算应力。对钢吊车桁架的下弦节点板进行了疲劳强度验算，结果显示，按扩散角计算节点板疲劳强度偏于危险。
[关键词] 钢吊车桁架 疲劳强度 扩散角The stress of a certain crane truss is analysed by FEM method, and the results of FEM are compared with the test results. The fatigue strength of gusset of bottom chord, which is sensitivity to fatigue, is calculated by FEM method. Fatigue strength checking computations are carried out for this crane truss. It is inclinable to danger when fatigue strength of gusset of this crane truss is calculated by pervasion angle.
Keywords: steel crane truss; fatigue strength; safety control; pervasion angle
