工字形钢吊车梁上部区域疲劳性能与加固研究

Research on Fatigue Performance and Reinforcement of the Upper Area of I-shaped Steel Crane Beam

在冶金工业厂房中重级制吊车的运行区域,工字形钢吊车梁腹板与上翼缘连接处经常出现疲劳损伤,对生产安全带来了极大的威胁,所以确认钢吊车梁该处发生疲劳损伤的原因并进行加固具有重要意义。本篇文章以某实际项目为例,建立全尺寸全系统的有限元计算模型,分析吊车梁腹板与上翼缘连接处出现损伤的原因,并且确定加固方案后,对比加固前后以及不同加固方案下的腹板抗疲劳性能,为吊车梁的抗疲劳设计提供有效的指导。

In the operating area of heavy-duty cranes in metallurgical industrial plants,fatigue damage often occurs at the connection between the web plate and upper flange of the I-shaped steel crane beam,posing a great threat to production safety.Therefore,it is of great significance to confirm the cause of fatigue damage in the steel crane beam and carry out reinforcement.This article takes a practical project as an example,establishes a full size and full system finite element calculation model,analyzes the causes of damage at the connection between the web plate and the upper flange of the crane beam,and determines the reinforcement scheme.After comparing the fatigue resistance performance of the web plate before and after reinforcement and under different reinforcement schemes,it provides effective guidance for the fatigue resistance design of the crane beam.