Eccentric Compression Behavior Of Square Thin-walled Steel Tube-laminated Bamboo Composite Hollow Columns

Bamboo has excellent physical and mechanical performance, it possesses good hardness,high strength, wear resistance, and does an excellent job in compressive strength and flexuralperformance. Bamboo has been widely used as engineering structure materials in civilengineering. This paper has been design a new kind of multilayer bamboo veneer compositecolumn which named square thin-walled steel tube-laminated bamboo composite hollowcolumns (SBCC) was based on the development of bamboo/steel composite component. Thethin-walled square steel tube column core was used as the lining in SBCC, multi-layer bambooplywoods were glued together around the thin-walled stee. SBCC has high using valueand broad market prospects. It not only can be used as a support compression unit in structureengineering, but also can be used in ancient building maintenance, flood control and disasterrelief, tunnel projects and other projects which need wooden engineering material field,achieveing bamboo plywood in place of timber substitute. In this paper,9steel/bamboocomposite specimens were used to perform the eccentric compression tests. The failure modesof specimens were investigated during the process of the experiment, the load-deflection curvein the middle of column and the ultimate load were measured, and the influence factors of thecompression performance were analyzed. The test results indicate that the morphology of acompressive failure in an SBCC are primarily glue failure damage at the matrix interface on thecolumn end and damage to the internal bamboo plywood material, glue failure damage on thetension side in the middle of the column and buckling damage to the plywood material on thecompressive side, and damage of large deflection of specimens. The overall adhesive strengthbetween the matrixes is the primary decisive factor that determines the failure mode. Study theinfluence of slenderness ratio, eccentricity, hollow ratio and cross-sectional area on thecompressive bearing capacity of SBCC, Used the software ABAQUS to carry out the finiteelement simulation analysis, based on the experimental data and simulation analysis, a modelto determine the compressive capacity of an SBCC was presented, which can provide guidancefor engineering applications. An office Ribbon style interface SBCC visualization programwhich based on the platform of Microsoft Visual Studio2010by using MFC (MicrosoftFoundation Classes) for calculating the ultimate bearing capacity (SBCCDesignBox) wasdeveloped.