EXPERIMENTAL STUDY ON PERFORMANCE OF STEEL-BAMBOO COMPOSITE COLUMN UNDER AXIAL COMPRESSION

Three column specimens have been produced in this study, and structural adhesive has been used to combine cold-formed thin-walled C steel and bamboo plywood together. An axial-compression experiment is made to observe and analyze the deformation and damage forms, and explore the failure mechanism. Besides that, a propositional calculation formula about the limit bearing capacity is put forward. By making a different deal with upper loading ends of specimens, the effects of process errors on bearing capacity of specimens are taken into consideration. Results have shown that: 1) deformation of cold-formed steel and bamboo plywood is basically consistent under axial compression, which is actually the plane-section assumption, and the unitary mechanical behavior of columns is very good; 2) in the whole loading process, specimens show an ideal elastic-perfectly performance, but the plasticity-enhancement impact is not obvious, thusly disregard the contribution of plastic enhancement on bearing capacity; 3) when specimens are damaged, it has a phenomenon that shape of bamboo plywood is locally bulgy and curved convexly as a waist drum, and the inner steel is yielding; 4) process errors have a great influence on the bearing capacity.