Web Crippling Capacity of Cold-Formed Stainless Steel SHS and RHS

doi:10.16183/j.cnki.jsjtu.2022.291

Abstract

Abstract:

This paper investigates the ultimate capacities of domestic cold-formed stainless steel square and rectangular hollow sections (SHS and RHS) undergoing web crippling. The finite element (FE) software Abaqus was employed during the investigation. It verifies the validity of FE models against experimental results available in the literature and performs an extensive parametric study comprised of 224 FE analyses to obtain the web crippling capacities of cold-formed stainless steel SHS and RHS, considering various materials, cross-sectional dimensions, bearing lengths and loading conditions in the parametric study. Based on the obtained FE results, the applicability of existing web crippling design provisions to domestic cold-formed stainless steel SHS and RHS is evaluated. The results indicate that the technical code of cold-formed steel structures (exposure draft) cannot be used for the studied cold-formed stainless steel SHS and RHS. On the other hand, it is shown that the American Specification SEI/ASCE 8-22 and proposed direct strength method (DSM) can lead to safe and accurate design predictions. Therefore, the SEI/ASCE 8-22 and DSM can be used to predict the capacities of domestic cold-formed stainless steel SHS and RHS undergoing web crippling.

Key words: stainless steel, cold-formed steel, web crippling, local bearing, design method

CLC Number:

TU392

ZHAN Kejiang, LI Haiting, WANG Miao, ZHOU Feng, ZHAO Jincheng. Web Crippling Capacity of Cold-Formed Stainless Steel SHS and RHS[J]. Journal of Shanghai Jiao Tong University, 2023, 57(12): 1619-1630.

Figures/Tables 15

Fig.1

Fig.2

Tab.1

Fig.3

Fig.4

Tab.2

FEA results and test results[22]

试件编号	P_Exp/kN	P_FEA/kN	$P E x p P F E A$	试件编号	P_Exp/kN	P_FEA/kN	$P E x p P F E A$
EOF-A150×150×3-N150	47.2	44.6	1.06	ETF-A150×150×3-N150	28.2	27.5	1.03
EOF-A150×150×3-N75	28.8	30.4	0.95	ETF-A150×150×3-N75	20.0	20.3	0.99
EOF-A150×150×6-N150	184.6	209.4	0.88	ETF-A150×150×6-N150	148.3	140.9	1.05
EOF-A150×150×6-N75	124.3	132.3	0.94	ETF-A150×150×6-N75	95.8	89.7	1.07
EOF-D140×80×3-N75	37.6	38.3	0.98	ETF-D140×80×3-N75	23.4	26.3	0.89
EOF-D140×80×3-N50	33.6	32.9	1.02	ETF-D140×80×3-N50	20.6	23.0	0.90
EOF-D160×80×3-N75	32.4	35.3	0.92	ETF-D160×80×3-N75	23.1	24.4	0.95
EOF-D160×80×3-N50	29.6	29.8	0.99	ETF-D160×80×3-N50	20.7	21.7	0.95
IOF-A150×150×3-N150	59.3	56.7	1.05	ITF-A150×150×3-N150	62.1	65.3	0.95
IOF-A150×150×3-N75	51.4	47.2	1.09	ITF-A150×150×3-N75	54.1	52.1	1.04
IOF-A150×150×6-N150	228.9	205.6	1.11	ITF-A150×150×6-N150	275.1	251.4	1.09
IOF-A150×150×6-N75	207.0	185.0	1.12	ITF-A150×150×6-N75	223.7	197.1	1.14
IOF-D140×80×3-N75	51.4	54.5	0.94	ITF-D140×80×3-N75	61.1	62.4	0.98
IOF-D140×80×3-N50	49.0	50.7	0.97	ITF-D140×80×3-N50	56.1	56.6	0.99
IOF-D160×80×3-N75	52.5	51.3	1.02	ITF-D160×80×3-N75	63.1	59.5	1.06
IOF-D160×80×3-N50	49.1	47.6	1.03	ITF-D160×80×3-N50	56.6	53.6	1.06

Tab.2

Tab.3

Tab.4

Tab.5

Finite element results in parametric study

试件系列	P_FEA/kN				试件系列	P_FEA/kN
试件系列	EOF	IOF	ETF	ITF	试件系列	EOF	IOF	ETF	ITF
A80×80×1.5-N80	8.8	11.7	5.9	11.6	D80×80×1.5-N80	14.5	19.2	9.3	19.4
A80×80×1.5-N40	5.8	9.7	4.1	10.2	D80×80×1.5-N40	9.4	15.5	6.6	17.0
A80×80×2-N80	14.2	18.7	9.9	18.8	D80×80×2-N80	24.6	30.6	16.7	31.9
A80×80×2-N40	9.6	15.6	7.0	16.4	D80×80×2-N40	15.5	24.5	11.4	26.6
A80×80×3-N80	27.5	35.1	20.1	36.9	D80×80×3-N80	33.5*	56.6	34.7	60.9
A80×80×3-N40	18.8	30.3	14.2	31.6	D80×80×3-N40	29.7	46.5	23.1	50.4
A100×100×2-N100	15.2	20.5	10.4	20.2	D100×100×2-N100	25.5	33.8	16.6	34.0
A100×100×2-N50	10.1	17.0	7.3	17.8	D100×100×2-N50	16.4	27.2	11.7	29.5
A100×100×2.5-N100	22.1	29.4	15.5	29.3	D100×100×2.5-N100	38.2	48.3	26.0	49.8
A100×100×2.5-N50	14.8	24.6	10.9	25.6	D100×100×2.5-N50	24.0	38.7	17.8	41.6
A100×100×3-N100	29.8	39.1	21.3	39.6	D100×100×3-N100	51.8	63.9	36.7	67.0
A100×100×3-N50	20.2	33.2	15.1	34.4	D100×100×3-N50	32.4	51.6	24.7	55.3
A150×150×2-N150	16.4	23.1	10.7	22.6	D150×150×2-N150	24.9	37.8	15.4	35.6
A150×150×2-N75	10.8	18.8	7.6	20.2	D150×150×2-N75	17.1	31.5	11.4	32.2
A150×150×4-N150	54.9	72.4	39.0	73.4	D150×150×4-N150	94.5	119.0	66.2	124.7
A150×150×4-N75	36.8	60.6	27.5	64.0	D150×150×4-N75	59.8	95.5	45.0	103.6
A150×150×6-N150	106.4	135.6	78.7	144.7	D150×150×6-N150	167.1*	217.4	135.6	236.8
A150×150×6-N75	72.6	118.0	55.6	123.1	D150×150×6-N75	115.5	181.4	89.9	194.6
A200×100×2-N100	11.9	20.1	8.1	23.1	D200×100×2-N100	17.7	33.5	11.7	36.1
A200×100×2-N50	8.7	16.8	6.9	18.6	D200×100×2-N50	13.8	26.9	9.9	30.0
A200×100×4-N100	40.7	63.4	30.2	71.2	D200×100×4-N100	67.8	100.8	49.6	116.8
A200×100×4-N50	29.4	54.1	24.2	59.7	D200×100×4-N50	45.8	82.2	39.1	91.8
A200×100×6-N100	81.0	123.2	61.9	136.8	D200×100×6-N100	130.9	188.4	102.2	216.6
A200×100×6-N50	58.4	107.3	48.6	118.9	D200×100×6-N50	88.1	160.6	75.7	181.1
A250×150×2-N150	12.6	22.9	8.8	23.6	D250×150×2-N150	17.4	37.9	11.0	34.3
A250×150×2-N75	9.5	18.8	6.9	20.6	D250×150×2-N75	13.9	31.1	9.3	32.3
A250×150×3-N150	27.9	45.0	19.3	49.9	D250×150×3-N150	43.7	74.8	28.6	79.5
A250×150×3-N75	20.1	37.3	15.7	40.9	D250×150×3-N75	32.4	59.7	23.5	65.7

Tab.5

Tab.6

Tab.7

Tab.8

Tab.9

Fig.5

Fig.6

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截面	平板段^[22]				弯角段
截面	E/GPa	f_0.2/MPa	f_u/MPa	n	E/GPa	f_0.2/MPa	f_u/MPa	n
A150×150×3	189	448	699	6	189	594	732	6
A150×150×6	194	497	761	6	194	647	762	6
D140×80×3	212	486	736	5	212	626	839	5
D160×80×3	208	536	766	5	208	651	836	5

荷载工况	P_Exp/P_FEA
荷载工况	平均值	变异系数
EOF^*	0.98	0.050
ETF	0.98	0.069
IOF	1.04	0.062
ITF	1.04	0.060

材料	平板段				弯角段
材料	E/GPa	f_0.2/MPa	f_u/MPa	n	E/GPa	f_0.2/MPa	f_u/MPa	n
S30408	193	205	515	6	193	438	680	6
S22053	200	450	620	5	200	527	767	5

荷载工况	C	C_r	C_N	C_h
ETF	1	0.35	2.60	0.050
ITF	4	0.21	0.75	0.010
EOF	2	0.32	1.60	0.040
IOF	1	0.04	2.30	0.001

荷载工况	C	C_r	C_N	C_h
ETF	7.5	0.08	0.12	0.048
ITF	20	0.10	0.08	0.031
EOF	4	0.14	0.35	0.020
IOF	13	0.23	0.14	0.010