Large Deformability of 2D Framed Structures Connected by Flexible Joints
Large Deformability of 2D Framed Structures Connected by Flexible Joints
复制标题
柔性接头连接的二维框架结构的大变形能力
DOI：
10.1299/jmmp.2.1037
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Y. Shibutani
中科院分区：
文献类型：
--
作者：
Hiro Tanaka;Y. Shibutani
在本文中，我们提出了一个有限位移建模技术的基础上的总拉格朗日公式的结构分析的二维（2D）框架结构连接的柔性节点。我们提出的模型包括梁段与三节点单元和柔性关节与多个旋转节点，具有更高的旋转自由度的变形相比，一个经典的连续梁模型。因此，该模型的范畴可以看作是一个分段C1连续梁模型的旋转不连续的关节。本研究的目的是了解框架结构的屈曲模态和后屈曲行为，这是理解框架结构完整性的关键问题。大弹性变形模拟表明，一个2D重复结构与有限的正方形网格具有双轴对称屈曲作为一个高阶模式在单轴压缩下，并具有冗余的后屈曲变形，刚性连接结构可能没有。
In this paper, we propose a finite displacement modeling technique based on the total Lagrangian formulation for the structural analysis of two-dimensional (2D) framed structures connected by flexible joints. Our proposed model consists of beam segments with three-node elements and flexible joints with multi-rotational nodes, which have higher rotational degrees of freedom for deformation compared with those of a classical continuum beam model. Therefore, the category of this model can be regarded as a piecewise C1 continuum beam model with rotational discontinuity on the joints. The objective of this study is to understand both the buckling modes and the post-buckling behaviors, which are key issues to understanding the integrity of the framed structures. Large elastic deformation simulations of the proposed model reveal that a 2D repetitive structure with finite square grids has biaxial symmetry buckling as a higher-order mode under uniaxial compression and has redundant post-buckling deformability, which rigid-jointed structures might not have.