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

Abstract

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

CLC Number:

TU33

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.

Figures/Tables 16

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References 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

Shear performance test of corroded cold-formed thin-walled steel hybrid connection

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