多角柱和角单元抗压能力的试验和数值分析

通过采用INSTRON材料试验机对规则多角柱和菱形柱在拟静力轴压下的耗能性能进行研究。研究圆心角对角单元的变形模式和均压力的影响。通过数值分析研究拟静力和动力轴压下多角柱和角单元的抗压能力。通过数值计算得到的多角柱的压力和变形模式与试验结果吻合较好。另外,基于试验中观察到的结果,对耗能变形机制进行讨论。

Experimental and Numerical Investigation on Crush Resistance of Polygonal Columns and Angle Elements

Energy absorption characteristics of regular polygonal columns and rhombic columns under quasi-static axial compression are investigated by using an INSTRON materials testing machine. The influence of central angle on deformation mode and mean crushing force of angle elements is studied. Numerical investigations are also carried out to study the crush resistance of polygonal columns and angle elements under quasi-static and dynamic axial compression. The numerical predicted crushing force and deformation mode of the polygonal columns are found to be in good agreement with the experimental results. In addition, based on the experiment observations, some discussion about the deformation mechanism of energy absorption is presented.