轮扣式支模架结构整体稳定性分析

doi:10.16265/j.cnki.issn1003-3033.2022.07.1917

摘要/Abstract

摘要：

为解决轮扣式支模架结构在施工过程中安全性差、施工方案难以确定的问题,基于轮扣式支模架正常工作的受力状况,进行单双层中心杆、边杆、角杆3种工况立杆的稳定承载力试验,并对比分析试验结果与有限元分析结果,相互验证其可行性与正确性;基于验证的有限元模型和半刚性连接节点的非线性特性,通过轮扣式支模架结构一阶屈曲模态和非线性屈曲分析,研究节点抗弯刚度及加载方式等参数对轮扣式支模架结构整体稳定性的影响特征。结果表明:随着节点抗弯刚度的增加,临界荷载越来越大,结构整体稳定性越好;采用中心加载方式的结构稳定性最好。

关键词: 轮扣式支模架, 节点半刚性, 稳定性, 抗弯刚度, 屈曲分析

Abstract:

In order to address problems like poor safety of wheel coupler formwork support and difficulty in determining construction scheme, stability bearing capacity of central pole, side pole and corner pole at single layer and double layers was experimentally carried out based on normal operation stress state of the formwork support. The experiment results were analyzed and compared with finite element analysis results, and their feasibility and correctness were verified. Then, based on verified finite element model and nonlinear characteristics of semi-rigid connection joints, first-order buckling modal analysis and nonlinear buckling analysis of wheel coupler formwork support were carried out, and influence of joint bending stiffness and loading method on the support's stability was studied. The results show that along with increase of joint bending stiffness, critical load will grow bigger while overall stability of the support is better, which will be the best when central loading method is adopted.

Key words: wheel coupler formwork support, semi-rigid connection joint, stability, bending stiffness, buckling analysis

董金凤, 刘海卿, 雷明, 陈子木, 程杨, 徐红武. 轮扣式支模架结构整体稳定性分析[J]. 中国安全科学学报, 2022, 32(7): 85-92.

DONG Jinfeng, LIU Haiqing, LEI Ming, CHEN Zimu, CHENG Yang, XU Hongwu. Overall structural stability analysis on wheel coupler formwork support[J]. China Safety Science Journal, 2022, 32(7): 85-92.

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试件编号	层数	工况	立杆数量/根	水平杆数量/根
SJ1	单层	中心杆	5	4
SJ2	单层	边杆	4	3
SJ3	单层	角杆	3	2
SJ4	双层	中心杆	10	8
SJ5	双层	边杆	8	6
SJ6	双层	角杆	6	4

试件编号	标距	厚度	弧度	外径
SJ1	50	3.0	10.48	47.93
SJ2	50	3.0	10.48	47.93
SJ3	50	3.0	10.48	47.93