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引用次数: 0
摘要
为了研究 H 型钢构件在单调和循环荷载作用下发生局部屈曲之前的断面塑性应力和双轴弯矩的发展机理,在 ABAQUS 中建立了大量参数分析模型。这些模型明确考虑了不同加载角度下的不同轴力比、板宽厚比,并根据现有实验数据验证了其适用性。在有限元分析结果的基础上,深入研究了各种因素对截面法向应力发展的影响。考虑到双向位移、法向应力分布形式以及双轴弯矩之间的关系,建立了一个半经验半理论计算模型,以解决 H 型钢构件的双轴荷载问题。通过将该模型与有限元结果进行比较,发现该模型能有效预测 H 型钢构件在双轴荷载作用下的双轴弯矩发展过程。该模型为在双向抗弯设计中考虑横截面的部分塑性发展提供了更便捷的设计方法。
A Theoretical Calculation Model of H-Section Steel Members for Biaxial Bending Moments
To investigate the development mechanism of sectional plastic stress and biaxial bending moments of H-section steel members prior to local buckling subjected to monotonic and cyclic loading, extensive parametric analysis models were established in ABAQUS. These models explicitly accounted for different axial force ratios, plate width-thickness ratios under different loading angles, verifying the applicability against existing experimental data. Based on the results of finite element analysis, the effects of various factors on the development of normal stresses in the cross-section were thoroughly investigated. A semi-empirical semi-theoretical calculation model was established to address biaxial loading in H-section steel members, considering bidirectional displacement, the form of normal stress distribution, and the relationship between the biaxial bending moments. By comparing the model with finite element results, it was observed that the model effectively predicted the progression of biaxial bending moments development subjected to biaxial loading in H-section steel members. This model provides a more convenient design approach for considering the partial plastic development of the cross-section in bidirectional flexural design.
期刊介绍:
The International Journal of Steel Structures provides an international forum for a broad classification of technical papers in steel structural research and its applications. The journal aims to reach not only researchers, but also practicing engineers. Coverage encompasses such topics as stability, fatigue, non-linear behavior, dynamics, reliability, fire, design codes, computer-aided analysis and design, optimization, expert systems, connections, fabrications, maintenance, bridges, off-shore structures, jetties, stadiums, transmission towers, marine vessels, storage tanks, pressure vessels, aerospace, and pipelines and more.