Large Scale Buckling Tests of Bar Bundle Columns

Abstract Bar bundle columns are a new type of composite column. For this purpose, high‐strength reinforcing bars with yield strength 670 N/mm 2 is set in steel tube and then grouted mortar. Due to the lower cross‐sectional thickness threaded bars, no reduction due material effects required compared solid core cross‐section. The bundling results high content relation total cross‐section; as result, novel column achieves load‐bearing capacities that usually typical for significantly larger dimensions. In addition, bar exhibit better heating behavior cross sections, only touch at certain points. As part AiF research project IGF‐ 20352 N, 10 buckling tests lengths between 3.5 m 8 were carried out. Cross sections 1, 3, 7 19 investigated. experimental setup, measurement technique shown here.