竹胶板/薄壁钢管约束收尘石粉混凝土组合柱轴压性能

Subjects: Mechanics >> Applied Mechanics submitted time 2023-03-20 Cooperative journals: 《应用力学学报》

赵卫锋 罗宗健 周靖 黎亚军 补国斌

Abstract： A new type of bamboo-plywood and thin-walled steel tube-encased dust-powder concrete com-posite column (BSDCC) was proposed.Ten BSDCC specimens were used to perform the axial compressiontest.'The damage and failure mode were investigated , and the influences of dust-powder concrete ( DPC)content ratio, concrete strength , slenderness ratio , restraint mode of sectional combination and binding-bars , and spacing ratio of binding-bars on the ultimate bearing capacity and deformation of specimens wereanalyzed.The results show that the compressive failure modes of BSDCC are mainly glue failure of the bamboo plywood and the thin-walled steel tube between the binding bars , and the material broken damageof the bamboo plywood in the middle of the specimen.The concrete content ratio has no significant effecton the ultimate bearing capacity , but has an important effect on the deformation under the same condition,which leads to the change of the failure mode of the specimen. The bearing capacity of specimens decrea-ses with the increase of the slendeness ratio and the spacing ratio of the binding bars , and increases withthe increasing concrete strength and the constraint of sectional combination and binding bars restraint modeon the bamboo plywood.A calculating model for the axial compression bearing-capacity of BSDCC is pro-posed through the regression analysis.

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