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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

40卷

期数:

2023年04期

页码:

107-116

栏目:

建筑结构

出版日期:

2023-07-10

文章信息/Info

Title:

Study on the in-plane stability of high-strength steel members under combined axial compression and bending based on member direct analysis method

文章编号:

1673-2049(2023)04-0107-10

作者:

李中汉¹,刘占科^2,3

(1. 甘肃省交科建设有限公司,甘肃 兰州 730030; 2. 兰州大学 西部灾害与环境力学教育部重点实验室,甘肃 兰州 730000; 3. 兰州大学 土木工程与力学学院,甘肃 兰州 730000)

Author(s):

LI Zhonghan¹, LIU Zhanke^2,3

(1. Gansu Communications Sci-Tech Construction Co., Ltd., Lanzhou 730030, Gansu, China; 2. Key Laboratory of Mechanics on Disaster and Environment in Western China, The Ministry of Education of China, Lanzhou University, Lanzhou 730000, Gansu, China; 3. College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, Gansu, China)

关键词:

构件直接分析法;  高强钢压弯构件;  平面内稳定;  等效弯矩系数;  C_mx系数

Keywords:

member direct analysis method;  high-strength members under combined axial compression and bending;  in-plane stability;  equivalent moment factor;  C_mx factor

分类号:

TU391

DOI:

10.19815/j.jace.2022.11060

文献标志码:

A

摘要:

基于构件直接分析法,建立了横向荷载作用下两端简支初弯曲压弯构件平面内稳定的通用分析过程,得到了挠度的一般表达式和二阶弯矩的一般表达式。以全跨均布荷载、跨中集中荷载作用下初弯曲压弯构件为研究对象,采用数形结合法确定了最大二阶弯矩的位置,得到了对应的最大二阶弯矩、C_mx系数的表达式,基于边缘屈服准则确定了轴压力-弯矩相关方程。对比了C_mx系数与《钢结构设计标准》(GB 50017—2017)中的等效弯矩系数,并通过数值算例验证了分析结果的正确性。结果表明:对于横向荷载作用下两端简支初弯曲压弯构件的平面内失稳,不需要采用等效弯矩概念和等效弯矩系数进行内力的确定,GB 50017—2017中的等效弯矩系数未实现等效的效果; 当采用《高强钢结构设计标准》(JGJ/T 483—2020)设计压弯构件的平面内稳定时,建议采用C_mx系数代替GB 50017—2017中的等效弯矩系数。

Abstract:

Based on the member direct analysis method, the general analysis process of in-plane stability of simply supported initial bending members under combined axial compression and bending was established, and the general expressions of deflection and second-order moment were obtained. Taking the initial bending members under combined axial compression and full-span uniform load or mid-span concentrated load as the research object, the position of the maximum second-order moment was determined by the combination of expressions and figures, and the corresponding expressions of the maximum second-order moment and C_mx factor were obtained. Based on the first yield criterion, the axial force-moment correlation equation was proposed. C_mx factor was compared with the equivalent moment factor in the Standard for Design of Steel Structure(GB 50017—2017), and the correctness of the analysis results was verified by numerical examples. The results show that for the in-plane stability of simply supported initial bending members under combined axial compression and bending, it is not necessary to use the concept of equivalent moment and the equivalent moment factor to determine the internal force, and the equivalent moment factor in GB 50017—2017 does not achieve the equivalent effect. When the in-plane stability of simply supported initial bending members under combined axial compression and bending is designed according to the Standard for Design of High Strength Steel Structure(JGJ/T 483—2020), it is recommended to use C_mx factor instead of the equivalent moment factor in GB 50017—2017.

参考文献/References:

[1] 李国强,闫晓雷,陈素文.Q460高强钢焊接箱形压弯构件极限承载力试验研究[J].土木工程学报,2012,45(8):67-73.
LI Guoqiang,YAN Xiaolei,CHEN Suwen.Experimental study on the ultimate bearing capacity of welded box-section columns using Q460 high strength steel in bending and axial compression[J].China Civil Engineering Journal,2012,45(8):67-73.
[2]李国强,闫晓雷,陈素文.Q460高强度钢材焊接H形截面弱轴压弯柱承载力试验研究[J].建筑结构学报,2012,33(12):31-37.
LI Guoqiang,YAN Xiaolei,CHEN Suwen.Experimental study on bearing capacity of welded H-section columns using Q460 high strength steel under bending and axial compression[J].Journal of Building Structures,2012,33(12):31-37.
[3]班慧勇,施 刚,石永久.高强钢焊接箱形轴压构件整体稳定设计方法研究[J].建筑结构学报,2014,35(5):57-64.
BAN Huiyong,SHI Gang,SHI Yongjiu.Research on design method for overall buckling behavior of welded box columns fabricated from high-strength steels[J].Journal of Building Structures,2014,35(5):57-64.
[4]班慧勇,施 刚,石永久.不同等级高强钢焊接工形轴压柱整体稳定性能及设计方法研究[J].土木工程学报,2014,47(11):19-28.
BAN Huiyong,SHI Gang,SHI Yongjiu.Overall buckling behavior and design method for axially compressed welded Ⅰ-sectional columns constructed with different grades of high-strength steels[J].China Civil Engineering Journal,2014,47(11):19-28.
[5]李国强,李天际,王彦博.Q690高强钢焊接箱形轴压构件整体稳定研究及设计建议[J].建筑结构学报,2017,38(10):1-9.
LI Guoqiang,LI Tianji,WANG Yanbo.Overall buckling behavior and design of Q690 high-strength steel welded box-columns subjected to axial compression[J].Journal of Building Structures,2017,38(10):1-9.
[6]班慧勇,施 刚,石永久.960 MPa高强度钢材轴压构件整体稳定性能试验研究[J].建筑结构学报,2014,35(1):117-125.
BAN Huiyong,SHI Gang,SHI Yongjiu.Overall buckling behavior of 960 MPa high strength steel welded section columns subjected to axial compression[J].Journal of Building Structures,2014,35(1):117-125.
[7]施 刚,朱 希.高强钢压弯和受弯构件计算模式不定性研究[J].工业建筑,2016,46(7):32-40.
SHI Gang,ZHU Xi.Research on resistance model uncertainties of high-strength steel members subjected to combined axial load and bending and flexural members[J].Industrial Construction,2016,46(7):32-40.
[8]高强钢结构设计标准:JGJ/T 483—2020[S].北京:中国建筑工业出版社,2020.
Standard for design of high strength steel structure:JGJ/T 483—2020[S].Beijing:China Architecture & Building Press,2020.
[9]钢结构设计标准:GB 50017—2017[S].北京:中国建筑工业出版社,2018.
Standard for design of steel structures:GB 50017—2017[S].Beijing:China Architecture & Building Press,2018.
[10]周期石,周绪红,刘永健,等.交错桁架结构二阶效应简化分析方法[J].建筑科学与工程学报,2011,28(4):35-38.
ZHOU Qishi,ZHOU Xuhong,LIU Yongjian,et al.Simplified analysis method of second-order effect on staggered truss structure[J].Journal of Architecture and Civil Engineering,2011,28(4):35-38.
[11]范 浩,王 新,董卫国,等.基于屈曲模态的弹性压弯构件平面内二阶弯矩计算[J].工程力学,2022,39(2):37-50.
FAN Hao,WANG Xin,DONG Weiguo,et al.Calculation of second-order in-plane bending moment of elastic compression-bending members based on buckling modes[J].Engineering Mechanics,2022,39(2):37-50.
[12]AUSTIN W J.Strength and design of metal beam-columns[J].Journal of the Structural Division,1961,87(4):1-34.
[13]MASSONNET C.Stability considerations in the design of steel columns[J].Journal of the Structural Division,1959,85(7):75-112.
[14]钢结构设计规范:GBJ 17—88[S].北京:中国建筑工业出版社,1989.
Specifications for the design of steel structures:GBJ 17—88[S].Beijing:China Architecture & Building Press,1989.
[15]钢结构设计规范:GB 50017—2003[S].北京:中国计划出版社,2003.
Code for design of steel structures:GB 50017—2003[S].Beijing:China Planning Press,2003.
[16]陈绍蕃.钢压弯构件面内等效弯矩系数取值的改进(上)——两端支承的构件[J].建筑钢结构进展,2010,12(5):1-7.
CHEN Shaofan.Improvement of the equivalent moment factor for in-plane stability calculation of steel beam-columns part(Ⅰ):members supported at both ends[J].Progress in Steel Building Structures,2010,12(5):1-7.
[17]陈绍蕃,申红侠,冉红东,等.钢压弯构件面内等效弯矩系数取值的改进(下)——端部有侧移的构件[J].建筑钢结构进展,2010,12(5):8-12.
CHEN Shaofan,SHEN Hongxia,RAN Hongdong,et al.Improvement of the equivalent moment factor for in-plane stability calculation of steel beam-columns part(Ⅱ):members with end sway[J].Progress in Steel Building Structures,2010,12(5):8-12.
[18]LIU Z K.Direct determination method for in-plane strength of nonsway beam-columns subjected to end moments or eccentric loads[J].Journal of Structural Engineering,2020,146(3):04020011.
[19]CHEN S J,WANG W C.Moment amplification factor for P-δ effect of steel beam-column[J].Journal of Structural Engineering,1999,125(2):219-223.
[20]SOHAL I S,DUAN L,CHEN W F.Design interaction equations for steel members[J].Journal of Structural Engineering,1989,115(7):1650-1665.
[21]沈祖炎,陈以一.钢压弯构件弯曲稳定验算的实用相关公式[J].结构工程师,1986,1:47-51.
SHEN Zuyan,CHEN Yiyi.Practical formulas for checking bending stability of steel bending members[J].Structural Engineers,1986,1:47-51.
[22]ZIEMIAN R D.Guide to stability design criteria for metal structures[M].6th ed.Hoboken:John Wiley & Sons,2010.
[23]刘占科,靳璐君,周绪红,等.钢构件整体稳定直接分析法研究现状及展望[J].建筑结构学报,2021,42(8):1-12.
LIU Zhanke,JIN Lujun,ZHOU Xuhong,et al.State-of-the-art on research of direct analysis method of steel members with global instability[J].Journal of Building Structures,2021,42(8):1-12.
[24]CHEN W F,LUI E M.Structural stability:theory and implementation[M].New York:Elsevier,1987.
[25]刘占科,周绪红.复合荷载作用下钢梁弯扭屈曲临界弯矩研究[J].土木工程学报,2018,51(1):76-90,99.
LIU Zhanke,ZHOU Xuhong.Research on critical moment of flexural-torsional buckling for steel beam subjected to combined loads[J].China Civil Engineering Journal,2018,51(1):76-90,99.
[26]Specification for structural steel buildings:ANSI/AISC 360-16[S].Chicago:American Institute of Steel Construction,2016.
[27]CHEN S F,SHEN H X.Improved accuracy for the C_m factor of steel beam-columns[J].Engineering Structures,2015,103:28-36.

相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2022-11-13
基金项目:国家自然科学基金项目(52278184); 中央高校基本科研业务费专项资金项目(lzujbky-2022-kb08)
作者简介:李中汉(1974-),男,高级工程师,E-mail:674538372@qq.com。
通信作者:刘占科(1981-),男,工学博士,副教授,硕士生导师,E-mail:liuzhk@lzu.edu.cn。

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更新日期/Last Update: 2023-07-01