超高装饰施工脚手架受力分析

Mechanical analysis on beyond-height-limitation decoration operation scaffolding

为研究超高装饰施工满堂脚手架在使用过程中的内力和变形规律,确保施工安全,以郑州市民中心Ⅰ标段科技馆精装修项目为背景,建立有限元模型进行分析计算。结果表明:立杆加固范围为脚手架搭设高度的1/3～1/2左右,受力较合理;水平剪刀撑和竖向剪刀撑均参与工作,竖向剪刀撑承担的内力大于水平杆,最大是水平杆的2. 3倍;超高脚手架整体倒塌的初始部位位于架体上部,脚手架中、上部应与主体结构"抱柱拉结"以及加密水平剪刀撑。

In order to study the internal force and deformation law of the scaffolding in the process of super-high decoration construction and ensure the construction safety,a finite element model was established to analyze and calculate the fine decoration project of the Science and Technology Museum of Zhengzhou Civil Center.The results show that the reinforcement range of the pole is about 1/3~1/2 of the scaffolding height,and the force is reasonable.The horizontal scissors support and the vertical scissors support are involved in the work,the internal force of the vertical scissors support is greater than the horizontal pole,and the maximum is 2.3 times than the horizontal pole.The initial part of the overall collapse of the super-high scaffold is located in the upper part of the frame body,and the middle and upper part of the scaffold should be"pull-knotted"with the main structure and the encrypted horizontal scissors.