高大模板支撑系统构件重要性分析

摘要

以某工程A座高大模板支撑架为工程背景，提取一阶屈曲模态作为结构的几何初始缺陷，采用生死单元法拆除指定构件，对其进行承载能力极限分析，之后对竖杆进行理论上的分析，得出板式架体的不同种类构件的重要性系数，结果表明板式架体竖向斜撑重要性系数最高，竖杆的屈曲荷载沿角部竖杆、边部竖杆和内部竖杆依次升高。%This paper is based on the engineering background of high-supported formwork in a building,using element add or remove,taking the first mode of eigenvalue analysis as the initial geometrical imperfections to analyze ultimate bearing capacity,then the importance coefficients of different kind of components can be got,after that some theoretical analysis of vertical bars is done,the results show that the importance coefficient of vertical bracing is the highest,and the buckling load of vertical bar is increased along the corner vertical bar,side vertical bar and inter-nal vertical bar.