高温后方形泡沫铝填充钢管轴向压缩力学性能

Axial compression mechanical performance of square foam aluminum-filled steel pipe after high temperature

为了研究高温后泡沫铝填充钢管轴向压缩性能,将制作好试件进行加温,自然冷却后进行静态轴向压缩试验,研究其承载能力和变形情况;分析加温温度、泡沫铝密度等参数对性能的影响。研究表明:在高温后压缩情况下,构件屈曲褶皱波瓣数量增加,其压缩变形模式从对称模式变成了非对称模式;其平均压溃载荷随加温温度的增加而减小,随着泡沫铝相对密度和外围钢管厚度的增大而增大;在平均压溃载荷理论公式中考虑外围钢管与填充的泡沫铝产生交互效应的影响,相关理论公式与试验结果吻合较好。

In order to study the axial compression performance of foam aluminum-filled steel pipes after high temperature,the pipes were heated.After natural cooling,the static axial compression test was carried out to study the bearing capacity and deformation;Effects of heating temperature,density of foam aluminum on the performance were analyzed.The results show that in the case of compression after high temperature,the number of buckling folded lobes of the component increases,its compression deformation mode changes from symmetric mode to asymmetric mode;The average crushing load decreases with the rise of heating temperature,which increases along with the higher relative density of foam aluminum and the thickness of peripheral steel pipe;In the theoretical formula of average crushing load,the interaction effect between the peripheral steel pipe and the filled foam aluminum is considered,and the relevant theoretical formula is in good agreement with the test results.