关键词: L形组合异形柱, 轴压性能, 含木率, 有限元模拟

Abstract: To meet the demands of large open spaces and flexible layouts in residential buildings, the special-shaped column structure system has undergone significant development in China, from initial research to mature application. However, existing studies have mainly focused on reinforced concrete materials, with insufficient exploration of new composite special-shaped columns. Therefore, this paper proposes a new L-shaped aluminum alloy square tube-wood-concrete composite special-shaped column structure. Through axial compression tests, it is found that the failure mode is mainly strength failure. Then, based on the test results of the special-shaped columns, a finite element model is established for simulation analysis. Finally, the test results are compared with the finite element results to verify the accuracy of the finite element model. Using the verified finite element calculation model, the influence of the wall thickness and the slenderness ratio of the aluminum alloy square tube on the axial compression performance of the column is analyzed. The research results show that with the increase of the wood content, the bearing capacity first increases and then decreases, and when the wood content is 24%, the synergy effect of the three materials is better. The bearing capacity is the largest when the wall thickness of the aluminum alloy is 6mm, which is 21.9% higher than that of the specimen with a 3mm wall thickness. Compared with other parameters, the slenderness ratio has the greatest influence on the bearing capacity of the L-shaped composite special-shaped column.

Key words: L-shaped combined irregular column, axial compression performance, wood content rate, finite element simulation