冷弯薄壁C型钢绕强轴偏心受压构件的极限承载力
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TU392.1

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国家自然科学基金(51678060)


Ultimate strength of C-shaped cold-formed steel members in compression and major axis bending
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    摘要:

    冷弯薄壁型钢结构多采用有效截面法对构件承载力进行计算,该方法计算繁杂且未考虑构件的畸变屈曲性能。直接强度法采用全截面计算各类参数,能够考虑各种单独屈曲模式及其相关屈曲对构件稳定性能的影响,但目前该方法并不能应用于压弯构件。对冷弯薄壁C形钢绕强轴偏压构件的稳定性能进行参数分析,探讨了构件长度、偏心距、腹板高厚比、翼缘宽厚比和卷边高厚比等因素对构件承载力的影响规律。结合有限元分析结果,基于轴压构件和纯弯构件的直接强度法公式,提出了冷弯薄壁型钢绕强轴偏压构件的极限承载力计算方法。

    Abstract:

    Effective section method (ESM) is widely used in the design of cold-formed steel structures. However, the influence of distortional buckling of members was hot considered. A new method for the load carrying capacity of cold-formed steel members, direct strength method (DSM), can effectively estimate the ultimate strength for local, distortional buckling and interactive buckling. However, it is not used for beam-columns. The stability behavior of C-shaped cold-formed members eccentrically compressed around the major axis was analyzed. The effects of Length of member, eccentricity and width-thickness ratio of webs, flanges and edge stiffeners on ultimate strength of members were examined in this study. A calculation method of ultimate strength was proposed based on the original DSM axial compression/bending formulas and the finite element analysis results.

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程睿,刘松松,黄宗明,石宇,崔佳,李哲刚.冷弯薄壁C型钢绕强轴偏心受压构件的极限承载力[J].土木与环境工程学报(中英文),2018,40(1):9-16. Cheng Rui, Liu Songsong, Huang Zongming, Shi Yu, Cui Jia, Li Zhegang. Ultimate strength of C-shaped cold-formed steel members in compression and major axis bending[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2018,40(1):9-16.10.11835/j. issn.1674-4764.2018.01.002

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  • 收稿日期:2017-02-26
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  • 在线发布日期: 2017-12-27
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