Overall structural stability analysis on wheel coupler formwork support

doi:10.16265/j.cnki.issn1003-3033.2022.07.1917

Abstract

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

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

工况		试验值		模拟值		误差/ %
工况		稳定承载力/kN	下降比例/ %	稳定承载力/kN	下降比例/ %	误差/ %
单层	中心杆	88	0	57	0	35
	边杆	82	7	53	7	35
	角杆	73	11	50	6	32
双层	中心杆	76	0	80	0	5
	边杆	62	18	60	25	3
	角杆	42	32	43	28	2