塔式起重机塔身是支承其整个上部质量的基础。塔机起吊过程中,承载着起吊物垂直方向的压力和塔机上部回转时产生的转动力矩。因此,组成塔身的标准节要有足够的强度和刚性。标准节广泛采用焊接桁架结构,其主弦杆一般选用钢管或角钢。主弦杆采用角钢时,焊接变形量更大。本文以主弦杆为角钢的标准节作为研究对象,通过分析其焊接变形的 Tower crane tower body is to support the entire upper part of the basis of quality. Tower crane lifting process, bearing the lifting of the vertical pressure and tower crane upper part of the rotation torque generated. Therefore, the standard section of the tower body should have sufficient strength and rigidity. The standard section widely welded welded truss structure, the main chord generally use steel or angle steel. The main chord angle, the welding deformation greater. In this paper, the main section of the standard chord as the angle of the research object, by analyzing the welding deformation