锈损冷弯薄壁型钢混合连接抗剪性能试验

doi:10.13229/j.cnki.jdxbgxb.20240206

摘要/Abstract

摘要：

为获得锈蚀对冷弯薄壁型钢纯自攻螺钉连接与自攻螺钉-拉铆钉混合连接抗剪性能的影响，对锈蚀状态下的上述连接试件进行剪切试验。结果表明：连接钢板的力学性能指标随失重率增加呈线性下降的趋势；同失重率下，纯自攻螺钉连接试件抗剪承载力下降幅度大于自攻螺钉-拉铆钉混合连接试件，且锈蚀时间越长此现象越明显；引入锈蚀因子确定此类连接的承载力计算公式，为锈损冷弯薄壁型钢连接承载力安全评估提供相应参考。

关键词: 锈蚀冷弯薄壁型钢连接, 剪切试验, 抗剪承载力, 退化规律, 计算方法

Abstract:

In order to obtain the influence of corrosion on the shear performance of pure self-tapping screw connection and self-tapping screw-pull rivet hybrid connection of cold-formed thin-walled steel， the shear test of the above connection specimens under corrosion condition was carried out. The results show that the mechanical properties of the connecting steel plate decrease linearly with the increase of weight loss rate. Under the same weight loss rate， the shear bearing capacity of the pure self-tapping screw connection specimen decreases more than that of the self-tapping screw-pulling rivet hybrid connection specimen， and the longer the corrosion time， the more obvious the phenomenon. The corrosion factor is introduced to determine the bearing capacity calculation formula of this kind of connection， which provides a corresponding reference for the safety assessment of the bearing capacity of corroded cold-formed thin-walled steel connections.

Key words: corroded cold-formed thin-walled steel connection, shear test, shear bearing capacity, degradation rule, calculation method

中图分类号:

TU33

褚云朋,陈雪琴,肖雅馨,夏珲. 锈损冷弯薄壁型钢混合连接抗剪性能试验[J]. 吉林大学学报(工学版), 2025, 55(11): 3476-3484.

Yun-peng CHU,Xue-qin CHEN,Ya-xin XIAO,Hui XIA. Shear performance test of corroded cold-formed thin-walled steel hybrid connection[J]. Journal of Jilin University(Engineering and Technology Edition), 2025, 55(11): 3476-3484.

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参考文献 16

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组别	试件编号	锈蚀时间/d	t/mm	连接方式
1	2-0.8-d	60	0.8+0.8	单一连接
2	4-0.8-d	120	--	--
3	6-0.8-d	180	--	--
4	2-0.8-h	60	0.8+0.8	混合连接
5	4-0.8-h	120	--	--
6	6-0.8-h	180	--	--
7	2-1.0-d	60	1.0+1.0	单一连接
8	4-1.0-d	120	--	--
9	6-1.0-d	180	--	--
10	2-1.0-h	60	1.0+1.0	混合连接
11	4-1.0-h	120	--	--
12	6-1.0-h	180	--	--
13	2-1.2-d	60	1.2+1.2	单一连接
14	4-1.2-d	120	--	--
15	6-1.2-d	180	--	--
16	2-1.2-h	60	1.2+1.2	混合连接
17	4-1.2-h	120	--	--
18	6-1.2-h	180	--	--
19	2-1.5-d	60	1.5+1.5	单一连接
20	4-1.5-d	120	--	--
21	6-1.5-d	180	--	--
22	2-1.5-h	60	1.5+1.5	混合连接
23	4-1.5-h	120	--	--
24	6-1.5-h	180	--	--
25	2-2.0-d	60	2.0+2.0	单一连接
26	4-2.0-d	120	--	--
27	6-2.0-d	180	--	--
28	2-2.0-h	60	2.0+2.0	混合连接
29	4-2.0-h	120	--	--
30	6-2.0-h	180	--	--

t/mm	锈蚀时间/d	屈服强度/MPa	抗拉强度/MPa	弹性模量/GPa	失重率/%	伸长率/%
0.8	0	272.5	360.3	200.00	0.00	30.7
	60	195.2	277.5	126.31	28.20	25.1
	120	156.3	185.2	104.32	39.47	3.1
	180	81.4	104.7	79.78	54.51	1.5
1.0	0	259.6	358.2	204.00	0.00	32.8
	60	230.0	293.7	131.40	21.66	25.2
	120	164.2	211.4	99.27	35.76	15.5
	180	152.7	185.1	82.63	43.60	6.3
1.2	0	288.2	353.4	206.00	0.00	29.5
	60	272.5	329.2	142.50	18.98	26.7
	120	225.6	271.3	130.30	25.93	21.1
	180	145.1	214.1	89.90	43.98	10.1
1.5	0	263.2	355.1	213.00	0.00	30.5
	60	235.0	301.7	140.90	19.98	23.4
	120	202.9	264.6	125.60	28.44	17.9
	180	165.1	212.4	94.90	43.31	16.5
2	0	262.4	365.8	210.00	0.00	31.2
	60	256.2	345.7	199.60	1.20	28.7
	120	244.1	322.8	185.00	1.87	28.0
	180	210.5	280.2	161.40	13.47	19.7

试件编号	0 d	60 d	120 d	180 d
0.8-d	4.75	3.90	2.7	1.20
0.8-h	5.39	5.00	4.05	3.30
1.0-d	5.03	4.46	3.83	2.00
1.0-h	7.43	7.00	4.56	2.90
1.2-d	7.18	6.60	4.81	2.40
1.2-h	8.71	8.00	5.96	4.25
1.5-d	8.93	8.30	5.73	4.90
1.5-h	9.56	9.10	7.56	6.00
2.0-d	12.14	9.35	8.44	6.70
2.0-h	11.43	10.20	9.4	7.90

t/mm	P_ns	P_t	P_t_/P_ns
0.8+0.8	4.44	4.75	1.07
1.0+1.0	6.17	5.03	0.82
1.2+1.2	8.00	7.17	0.90
1.5+1.5	11.23	8.92	0.79
2.0+2.0	15.39	12.13	0.79

t/mm	P_m	P_h	P_t	P_t/P_m	P_t/P_h
0.8+0.8	3.54	5.28	5.39	1.52	1.02
1.0+1.0	4.92	7.21	7.43	1.51	1.03
1.2+1.2	6.38	9.90	8.71	1.37	0.88
1.5+1.5	8.96	12.58	9.56	1.07	0.76
2.0+2.0	13.21	11.66	11.43	0.87	0.98