负弯矩下蜂窝组合梁腹板屈曲研究

贾连光; 唐康; 焦禹铭; 赵一民

doi:10.13204/j.gyjzg21081705

负弯矩下蜂窝组合梁腹板屈曲研究

doi: 10.13204/j.gyjzg21081705

1. 沈阳建筑大学土木工程学院, 沈阳 110168;
2. 中国中建设计集团有限公司辽宁分公司, 沈阳 110016;
3. 中房集团辽宁置业有限公司, 沈阳 110043

基金项目:

国家自然科学基金项目(51578346)

详细信息

作者简介:
贾连光,男,1961年出生,硕士,教授,博士生导师。电子信箱:syjlg@163.com

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出版历程
- 收稿日期: 2021-08-17
- 网络出版日期: 2023-02-06

Research on Buckling of Webs of Castellated Composite Beams Under Negative Bending Moment

1. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
2. China Construction Design Group Co., Ltd., Liaoning Branch, Shenyang 110016, China;
3. Liaoning Zhong Group Real Estate Co., Ltd., Shenyang 110043, China

摘要

摘要: 为了研究负弯矩及剪力共同作用下钢-混凝土蜂窝组合梁腹板屈曲性能,在对两根蜂窝组合梁和一根蜂窝钢梁试件进行静力加载试验的基础上,建立了含初始几何缺陷的蜂窝组合梁的非线性有限元模型,对经过验证的有限元模型进行参数研究,分析开孔率、腹板高厚比对蜂窝组合梁腹板屈曲性能的影响。研究表明:蜂窝梁上设置混凝土板可以提高试件屈服荷载和极限荷载,对腹板抗屈曲能力有一定提升;腹板高厚比对腹板屈曲性能影响较为显著,减小腹板高厚比可以提高组合梁的屈曲荷载,增强试件腹板抗屈曲性能;开孔率对腹板屈曲性能影响较大,减小开孔率可以提高组合梁的屈曲荷载;当高厚比在58以下时蜂窝组合梁强度破坏先于稳定破坏发生。
- 蜂窝组合梁 /
- 有限元分析 /
- 负弯矩 /
- 弯剪共同作用 /
- 腹板局部屈曲 /
- 高厚比 /
- 开孔率
Abstract: In order to study the buckling performance of webs of castellated steel-concrete composite beams under the combined action of negative bending moment and shear force, two castellated steel-concrete composite beams and one castellated steel beam were designed for static loading test. Based on the test results, the nonlinear finite element model of castellated steel-concrete composite beam with initial geometric imperfections was established. The finite element model was verified, and the effects of parameters, such as opening ratio and web height-thickness ratio, on the buckling performance of castellated steel-concrete composite beams were analyzed. The results showed that concrete slabs on beams could increase the yield load and ultimate load of specimens, and improve the buckling resistance of webs to a certain extent. The web height-thickness ratio had a significant effect on the buckling performance of webs. Reducing the web height-thickness ratio could improve the buckling load of webs and enhance the buckling performance of webs of specimens, The opening ratio had a great influence on the buckling performance of webs, the buckling load of composite beams increased with the decrease of opening ratio. When the height-thickness ratio was below 58, the strength failure of castellated steel-concrete composite beams occurred before the stability failure.
- castellated composite beam /
- finite element analysis /
- negative bending moment /
- the combined action of bending and shear /
- local buckling of web /
- height-thickness ratio /
- opening ratio

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