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本文结合太钢(集团)有限公司第二炼钢厂主厂房由于生产工艺改造要求,加大多台重型吊车吨位后,对钢吊车梁系统进行检测鉴定与加固设计的实际工程,介绍了一种在不停产情况下采用钢斜撑方案加固在用钢吊车梁的方案设计与可行性分析;并结合对已经加固施工并投产使用的三榀钢吊车梁的现场实际动测结果,按考虑下部钢斜撑与钢吊车梁二者协同工作的原理对钢吊车梁与下部斜撑之间的荷载分配比例以及加固后钢吊车梁的承载能力进行了进一步的计算验证和对比分析,论证了采用钢斜撑方案加固已有钢吊车梁的可行性。计算分析及试验研究结果表明,采用钢斜撑加固钢吊车梁以满足吊车吨位增加要求的方案设计是经济合理、切实可行的。本文提出的按协同工作方法对钢吊车梁采用钢斜撑方案进行加固的设计与计算方法可行,可以在今后的工业厂房吊车梁系统改造工程中推广应用。
In this paper, the actual project of steel crane girder system testing and identification and reinforcement design is introduced in the light of the requirements of production process modification and the increase of tonnage of several heavy-duty cranes in the main plant of No. 2 steel mill of TISCO (Group) The scheme design and feasibility analysis of the steel crane girder reinforced with steel bracing under non-stop production are analyzed. Based on the actual field test results of the Sanken steel crane girder which has been strengthened and put into operation, And the principle of the crane and the steel crane beam work together to carry out further verification and comparative analysis of the load distribution ratio between the steel crane beam and the lower braces and the bearing capacity of the reinforced steel crane girder. Feasibility of Reinforcing Existing Steel Crane Beams. The results of calculation and analysis show that it is economically reasonable and practicable to design a steel crane girder with steel braces to meet the requirement of increasing the tonnage of the crane. The method proposed in this paper is feasible and feasible for the design and calculation method of the steel crane girder using the steel brace to reinforce the steel crane girder according to the collaborative working method and can be applied in the future reconstruction project of the crane girder system in the industrial plant.