冷弯不锈钢方矩管腹板压跛极限承载力

doi:10.16183/j.cnki.jsjtu.2022.291

上海交通大学学报 ›› 2023, Vol. 57 ›› Issue (12): 1619-1630.doi: 10.16183/j.cnki.jsjtu.2022.291

所属专题：《上海交通大学学报》2023年“船舶海洋与建筑工程”专题

冷弯不锈钢方矩管腹板压跛极限承载力

战科江¹^,², 李海汀¹^,²(), 王淼¹^,², 周锋³, 赵金城¹^,²

1.上海交通大学船舶海洋与建筑工程学院,上海 200240
2.上海交通大学上海市公共建筑和基础设施数字化运维重点实验室,上海 200240
3.同济大学土木工程学院,上海 200092

收稿日期:2022-07-25 修回日期:2022-09-07 接受日期:2022-09-16 出版日期:2023-12-28 发布日期:2023-12-29
通讯作者: 李海汀,副教授,博士生导师;E-mail: haiting.li@sjtu.edu.cn.
作者简介:战科江(1998-),硕士生,从事冷弯型钢结构研究.
基金资助:
国家自然科学基金(52008243);上海市青年科技英才扬帆计划(20YF1419600)

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

ZHAN Kejiang¹^,², LI Haiting¹^,²(), WANG Miao¹^,², ZHOU Feng³, ZHAO Jincheng¹^,²

1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai Jiao Tong University, Shanghai 200240, China
3. College of Civil Engineering, Tongji University, Shanghai 200092, China

Received:2022-07-25 Revised:2022-09-07 Accepted:2022-09-16 Online:2023-12-28 Published:2023-12-29

摘要/Abstract

摘要：

为研究国产冷弯不锈钢方矩管局部承压下的腹板压跛极限承载力,采用有限元软件Abaqus建立了有限元模型,基于试验结果验证了模型的准确性;进一步通过224组参数分析算例计算了不同材料、截面尺寸、承压长度的冷弯不锈钢方矩管在各典型荷载工况下的腹板压跛极限承载力;基于参数分析算例结果,对既有腹板压跛设计方法的适用性进行了评估.结果表明:我国《冷弯型钢结构技术规范》(征求意见稿)计算公式对冷弯不锈钢方矩管的腹板压跛极限承载力预测精度较差,美国《冷弯不锈钢结构设计规范》(SEI/ASCE 8-22)及文献中直接强度法的计算结果准确且安全,可用于国产冷弯奥氏体和双相型不锈钢方矩管的腹板压跛极限承载力验算.

关键词: 不锈钢, 冷弯型钢, 腹板压跛, 局部承压, 设计方法

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

中图分类号:

TU392

战科江, 李海汀, 王淼, 周锋, 赵金城. 冷弯不锈钢方矩管腹板压跛极限承载力[J]. 上海交通大学学报, 2023, 57(12): 1619-1630.

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.

图/表 15

图1

图2

表1

图3

图4

表2

有限元计算结果与试验结果[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

表2

表3

表4

表5

参数分析算例有限元结果

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

表5

表6

表7

表8

表9

图5

图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

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

荷载工况	a	b	n	λ_k	γ
EOF	0.96	0.23	0.51	0.584	1.00
IOF	0.93	0.30	0.41	0.600	0.77
ETF	0.66	0.17	0.55	0.447	0.94
ITF	0.73	0.01	0.35	0.480	1.20

冷弯不锈钢方矩管腹板压跛极限承载力

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

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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

荷载工况	统计量	奥氏体			双向型
荷载工况	统计量	P_FEA/P_ASCE	P_FEA/P_GB	P_FEA/P_DSM	P_FEA/P_ASCE	P_FEA/P_GB	P_FEA/P_DSM
EOF	平均值	1.21	1.32	0.97	1.00	1.10	1.02
	变异系数	0.079	0.114	0.056	0.086	0.144	0.070
IOF	平均值	1.40	1.08	1.07	1.17	0.90	1.03
	变异系数	0.081	0.129	0.044	0.063	0.108	0.045
ETF	平均值	1.32	1.10	1.00	1.08	0.89	1.05
	变异系数	0.091	0.189	0.090	0.067	0.125	0.067
ITF	平均值	1.27	0.94	1.04	1.07	0.78	1.05
	变异系数	0.103	0.218	0.081	0.074	0.159	0.068

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