Volume 39 Issue 5
May  2024
Turn off MathJax
Article Contents
Keyang Ning, Meng Xiao, Kwok-Fai Chung. Experimental Study on Overall Buckling Behavior of Q690 High Strength Steel Cold-Formed Square Tube Columns Under Axial Compression[J]. STEEL CONSTRUCTION(Chinese & English), 2024, 39(5): 1-7. doi: 10.3724/j.gjgS24050101
Citation: Keyang Ning, Meng Xiao, Kwok-Fai Chung. Experimental Study on Overall Buckling Behavior of Q690 High Strength Steel Cold-Formed Square Tube Columns Under Axial Compression[J]. STEEL CONSTRUCTION(Chinese & English), 2024, 39(5): 1-7. doi: 10.3724/j.gjgS24050101

Experimental Study on Overall Buckling Behavior of Q690 High Strength Steel Cold-Formed Square Tube Columns Under Axial Compression

doi: 10.3724/j.gjgS24050101
  • Received Date: 2023-05-01
    Available Online: 2024-06-22
  • Publish Date: 2024-05-22
  • One of the strategies for decarbonizing the construction industry is to enhance the efficiency of engineering design in order to minimize the demand for building materials. Recent advancements in the production of high-strength steel have enabled this possibility. The effective utilization of high strength steel in engineering structures can decrease the dimensions of components and the usage amount of steel, consequently leading to reduced manufacturing, transportation, and construction expenses, which aids in resource conservation and contributes to the reduction of carbon emissions. Compared to the ordinary carbon steel Q355, the Q690 high strength steel exhibits excellent strength to self-weight ratios despite its high yield-to-tensile strength ratio and low elongations at fracture. The properties of high strength steel Q690 can greatly influence structural performance. Therefore, it is crucial to quantify the impact of these properties on structural performance in order to determine their suitability for use in building structures. The calculation method for the overall buckling bearing capacity of axial compression members in the current main structural steel design codes is primarily based on research data for ordinary carbon steels Q235 and Q355, and their applicability to Q690 high strength steel needs to be further verified. So it is very necessary to check the applicability of these design methods for axial compression members made of Q690 high strength steel using various fabrication processes. To investigate the overall buckling of cold-formed square columns made of Q690 high strength steel under axial compression, a total of eight specimens were designed. These specimens included four different cross-sectional sizes and eight slenderness ratios. The plate thicknesses used were 6 mm and 10 mm. The overall buckling of these specimens was examined through axial compression tests. Prior to the tests, measurements were taken to determine the geometrical initial bending, load initial eccentricity, and longitudinal residual stress distribution of the sections. Residual stress measurements revealed large residual tensile strain on both the inner and outer surfaces at the welded seams of the cold-formed square section. Additionally, significant residual tensile and compressive strains were found at the outer and the inner surfaces respectively of the round corners of section. It was found that all specimens exhibited overall buckling as the primary mode of failure under axial compression. The test results were compared with the calculation results of Chinese code GB 50017—2017 and European code Eurocode 3. The results indicate that the calculation results based on the design curves suggested by the Chinese code and Eurocode are conservative, and the Chinese code being more conservative compared to the European code. Based on the comparison of test results and design curves in the design code, it is recommended to use the column curve a in GB 50017—2017 and Eurocode 3 for the design of Q690 high strength steel cold-formed square tube columns.
  • loading
  • [1]
    Li T J, Li G Q, Wang Y B. Residual stress tests of welded Q690 high-strength steel box-and H-sections[J]. Journal of Constructional Steel Research, 2015, 115:283-289.
    [2]
    Khan M, Paradowska A, Uy B, et al. Residual stresses in high strength steel welded box sections[J]. Journal of Constructional Steel Research, 2016, 116:55-64.
    [3]
    Hu Y F, Chung K F, Ban H, et al. Investigations into residual stresses in S690 cold-formed circular hollow sections due to transverse bending and longitudinal welding[J/OL]. Engineering Structures, 2020, 219[2020-09-15]. https://doi.org/10.1016/j.engstruct.2020.110911.
    [4]
    Xiao M, Hu Y F, Jin H, et al. Prediction of residual stresses in high-strength S690 cold-formed square hollow sections using integrated numerical simulations[J/OL]. Engineering Structures, 2022, 253[2020-09-15]. https://doi.org/10.1016/j.engstruct.2021.113682.
    [5]
    班慧勇, 施刚, 石永久, 等. Q460 高强钢焊接箱形截面轴压 构件整体稳定性能研究[J]. 建筑结构学报, 2013, 34(1):22-29.
    [6]
    李国强, 王彦博, 陈素文. 高强钢焊接箱形柱轴心受压极限 承载力试验研究[J]. 建筑结构学报, 2012, 33(3):8-14.
    [7]
    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.
    [8]
    Yang L, Yin F, Wang J, et al. Local buckling resistances of coldformed high strength steel SHS and RHS with varying corner radius[J/OL]. Thin-Walled Structures, 2022, 172[2022-03-01]. https://doi.org/10.1016/j.tws.2022.108909.
    [9]
    Yin F, Yang L, Wang J, et al. Testing and design of cold-formed high strength steel square hollow section columns[J/OL]. Constructional Steel Research, 2024, 213[2024-09-01]. https://doi.org/10.1016/j.jcsr.2023.108394.
    [10]
    中华人民共和国住房和城乡建设部. 钢结构设计标准:GB 50017-2017[S]. 北京:中国建筑工业出版社,2018.
    [11]
    BSI. Eurocode 3:design of steel structures:part 1-1:general rules and rules for building:BS EN 1993-1-1[S]. London:BSI, 2005.
    [12]
    European Committee for Standardization. Metallic materials-tensile testing-part 1:method of test at room temperature:ISO 6892-1:2009[S]. Brussels, Belgium:CEN, 2009.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (83) PDF downloads(5) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return