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首页> 外文期刊>Journal of structural engineering >Behavior and Design of Steel-Concrete Composite Columns Subjected to Combined Axial Compression and Biaxial Moment
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Behavior and Design of Steel-Concrete Composite Columns Subjected to Combined Axial Compression and Biaxial Moment

机译：轴向压缩和双轴矩阵钢混凝土复合柱的行为与设计

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摘要

Steel-concrete composite columns are strong and efficient structural members. However, their strength is not consistently recognized within design standards. In particular, current provisions regarding the strength of composite columns under combined axial compression and biaxial bending are overly simplistic and conservative. This paper presents a study of the biaxial behavior of square and rectangular, filled and encased composite columns and methods of evaluating their strength. Analyses of composite cross sections confirm the conservative nature of current design provisions and form the basis for modified strength equations that better capture the shape of the three-dimensional interaction surface. Analyses of composite columns confirm that the proposed design equations are suitable for use within the direct analysis method for evaluating members with length effects. The proposed design equations are further validated against published experimental results. This paper provides key insights on the behavior of composite columns subjected to axial compression and biaxial bending and offers an improved yet practical method of evaluating strength under these conditions that will enable more efficient designs. (C) 2021 American Society of Civil Engineers.
机译：钢混凝土复合柱是强大而有效的结构构件。但是，它们的实力在设计标准中并不一致。特别地，关于组合轴向压缩和双轴弯曲下的复合柱强度的当前规定是过于简单的和保守的。本文介绍了正方形和矩形，填充和包装柱的双轴行为以及评估其强度的方法。复合横截面的分析证实了当前设计规定的保守性，并形成了更好地捕获三维相互作用表面形状的改进强度方程的基础。复合柱的分析确认所提出的设计方程式适用于直接分析方法，用于评估具有长度效应的成员。提出的设计方程进一步验证了出版的实验结果。本文提供了对经过轴向压缩和双轴弯曲的复合柱的行为的关键见解，并在这些条件下提供了一种评估强度的改进但是能够更有效的设计。 （c）2021年美国土木工程师协会。

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