Structural Behavior of Concrete Filled Bamboo Columns Under Axial Loads

Civil and environmental research Pub Date : 2020-08-01 DOI:10.7176/cer/12-8-05

Shitabuleh Stephen, Sabuni Bernadette, K. Bruce

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引用次数: 1

Abstract

This paper investigates the load carrying capacity development of concrete filled bamboo columns when subjected to static axial loads. Concrete Mix C20 and C30 were used to fill bamboo of different diameters and slenderness ratios. Compression tests were performed using Uniaxial Compression Machine under a loading rate of 31 Kn/s. Results revealed that increase in concrete grade had significant effect on the carrying capacity and crushing stresses with C20 increasing the load capacity of concrete filled bamboo by 0.8 times while C30 by 1.5 times. The carrying capacity increases as the diameter of the column is increased but decreases as the slenderness ratio is increased due to reduced stiffness of the column. Increase in column diameter reduces the crushing stresses due to increased carrying area. Deformation behavior showed that specimens filled with concrete mix C20 are more ductile and undergoes large displacements before failure while C30 specimens showed brittleness characteristics in all samples. Keywords: Bamboo. Concrete column, Ductility, Buckling, Deformation, Ultimate failure. DOI: 10.7176/CER/12-8-05 Publication date: August 31 st 2020

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竹混凝土柱轴向荷载作用下的结构性能

本文研究了竹混凝土柱在静轴向荷载作用下的承载能力发展。采用混凝土配合比C20和C30填充不同直径和长细比的竹材。在加载速率为31 Kn/s的单轴压缩机上进行压缩试验。结果表明，混凝土等级的增加对竹材混凝土的承载能力和破碎应力有显著影响，C20可使竹材混凝土的承载能力提高0.8倍，C30可使竹材混凝土的承载能力提高1.5倍。承载力随柱径的增大而增大，但随长细比的增大而减小。随着柱径的增大，承载面积增大，破碎应力减小。变形行为表明，C20混凝土试件在破坏前具有较强的延性和较大的位移，而C30试件在破坏前均表现出脆性特征。关键词:竹子。混凝土柱，延性，屈曲，变形，极限破坏。出版日期:2020年8月31日

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Civil and environmental research

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