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在建造海洋钢结构的过程中,一般是采用焊接方式而成,但是它本身的结构形式非常复杂,服役的环境也非常恶劣,在焊接过程中容易出现因为热循环不均匀导致的残余应力或是集中应力等因素,由此出现失效现象。随着钢板厚度的增加焊接接头的韧性逐渐下降,这样就带来工期延长和建造难度增大等问题,在整体热处理大型钢结构的导管架时就会出现不经济的问题。按照相关标准对导管架的危险部分进行焊接接头力学性能实验,确保实验结果合乎规定,这是当前最为经济和切实可行的方法。
In the process of building marine steel structure, it is generally made by welding, but its own structure is very complex, the service environment is very harsh, prone to welding process due to thermal cycling caused by uneven residual stress or Focus on stress and other factors, resulting in failure phenomenon. With the increase of the thickness of the steel sheet, the toughness of the welded joint gradually decreases, which leads to the problems of prolonged construction period and increased difficulty of construction, and the uneconomical problem occurs when the overall heat treatment is performed on the jacket of a large steel structure. It is the most economical and practicable method to carry out the mechanical property test of the welded joints on the dangerous part of the jacket in accordance with relevant standards to ensure the experimental results are in compliance.