多段配筋を有するRC造短柱の中心軸圧縮性状に関する研究

概要

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It is well known that lateral confinement reinforcement of the confined concrete is very useful in order to improve ductility for R/C columns. Already, many analytical researches have been reported and proposed by various researchers. However, up to the present, many researchers have been hardly evaluated the effect of longitudinal bar on the compressive behavior of confined concrete. The purpose of this paper is to investigate the effects of compressive strength and compressive ductility for the arrangement of longitudinal bar. The main variables are arrangement of longitudinal bar. The authors obtained the factor of amount of longitudinal bar which considered arrangement of longitudinal and transverse bars. As a test results, the compressive strength increased linearly in proportion to the amount of longitudinal bar by the arch action formed among longitudinal bars until buckling of the longitudinal bar occurred. Also, the decrease in compressive ductility due to buckling was more prominent for large amount of longitudinal bar. Furthermore, taking into account the effects of these factors, the equation for compressive strength and the stress-strain curves of confined concrete were proposed on the basis of the test results.
社団法人日本建築学会の論文
2007-08-30