利用焊接变形控制预制框架柱吊装质量

• 作 者: 吴永祥
• 出 处: 建筑工人
• 发表日期: 1982年06期
• 关键词: 焊接变形 焊接变形控制 相对尺寸 构件 工程质量 焊接应力 支座 高宽比 偏差 节点

装配式建筑的预制框架柱安装,支座节点经过焊接后,往往出现垂直偏差增大的现象,这是由焊接变形所引起的。因为焊接不均匀冷缩,牵动了构件,在高宽比很大的构件顶部就会反映出来。如一般3米高的框架柱,四角预留主钢筋在焊接过程中改变相对尺寸0,5毫米,柱顶就会偏移3～5毫米。因此,在吊装中控制好焊接变形,是提高工程质量的一个重要环节。

Prefabricated frame columns of prefabricated buildings are installed. After the welding of support nodes, vertical deviations often increase. This is caused by welding deformation. Because of the uneven shrinkage of welding, the components are affected and reflected on the top of the component with a large aspect ratio. For example, for a frame column with a height of 3 meters, the main reinforcing bars at the four corners will change the relative size of 0,5 mm during welding and the top of the column will be offset by 3 to 5 mm. Therefore, controlling the welding deformation in lifting is an important part of improving the quality of the project.