鉄骨鉄筋コンクリート長柱の弾塑性安定に関する実験的研究 (その1)

Abstract

In order to obtain the information on the elasto-plastic instability characteristics of longsteel reinforced concrete columns, parametric experimental study carried out on the strength, deflection curve and failure mechanism under eccentrically axial load, using 15 columnspecimens. Variables chosen for experiments are the effective column length and eccentricityat each end. All column specimens are of the same square cross section (10x10 cm) withH-shaped steel component. On the basis of the experimental and theoretical researches onthe moment-curvature relationships of the column section under constant axial compressionand monotonous applied pure bending, the stress-strain relationship of concrete is formulated.In the instability theoretical analysis, the shape of column deflection is assumed to be a partof cosine wave. From the comparision between the results of the test and the analysis, it isrecognized that instability strength of steel reinforced concrete column can be estimatedwith a sufficient accuracy by the analysis, but that load-deflection relationships from theanalysis does not predicted perfectly on the experimental result.