三角形钢管的准静态轴向压缩性能

为研究三角管的失效模式和能量吸收特性,对其进行了准静态轴向压缩试验,通过试验揭示其变形曲线和失效模式。基于2个基本折弯构件的不同组合,提出4个潜在的失效模式并进行比较,从理论上预测管的平均破碎力。利用数值模拟提出平均破碎力的拟合公式。理论分析和数值预测结果均与试验进行了比较,从而建立预测三角管平均破碎力的有效方法。

Quasi-Static Axial Compression of Triangular Steel Tubes

To study the collapse mode and energy absorption of triangular tubes , quasi-static axial compression experiments were carried out.Deformation curves and collapse modes were revealed by the experiments.Based on various combinations of the two basic folding elements , four potential collapse modes were proposed and compared to predict the mean crushing force of the tube theoretically.Numerical simulations were applied to suggest a fitted formula of the mean crushing force.Both the analytical and numerical predictions were compared with the experiments to build an effective method to predict the mean crushing force of the triangular tube.