期刊
ENGINEERING STRUCTURES
卷 198, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2019.109554
关键词
Steel-concrete composite beams; Lateral-torsional buckling; Rotational stiffness
资金
- Brazilian government agency CAPES
- Brazilian government agency CNPq
In hogging bending moment regions of continuous and semi-continuous steel-concrete composite beams, the bottom flange of the steel profile is compressed, and if the web is not rigid enough to avoid lateral bending, it will undergo distortion, causing a lateral displacement and a rotation of the compressed flange. These displacements characterize the mode of instability called lateral-torsional buckling (LTB). European Standard EN 1994.1-1:2004 presents a procedure to verify the ultimate limit state of LTB based on the elastic critical moment that depends on the rotational stiffness of the composite beam. In this paper, numerical models, simulating the inverted U-frame model for inner and edge composite beams, were developed with the support of the software ANSYS to evaluate the procedure presented by EN 1994-1-1:2004 to calculate the rotational stiffness of steelconcrete composite beams. The numerical results agreed reasonably well with the predictions of EN 1994-1-1:2004, however, the accuracy of the analytical procedure can be improved by a small adjustment in the slab rotational stiffness equation. It was also observed that, in certain situations, the rotational stiffness of composite beams can be determined in a simplified manner only as function of the value of the rotational stiffness of the web of the steel profile, without loss of precision.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据