Abstract
The purpose of this study is to elucidate how each factor takes part in the strength and ductility of reinforced concrete columns. For this purpose columns subjected to bending moment, shearing force and axial force were tested with emphasis on deflection, strain and bond slip measurements. From the test results the effect of material behavior of a column member was studied (Part 1, 2) and further investigation is made by comparing test results with the results of the analysis using some of the test results. Two identical specimens are tested with emphasis on the monotonous load on No.1 and the cyclic loads on No.2. Measurements were as follows, 1. Deflections by displacement meters and dial gauges 2. Strain of reinforcing bars and concrete by wire strain gauges 3. Average strain of concrete by contact gauge 4. Bond slip measured directly by contact gauge and calculated from strain. 5. Observation of cracks Load-deflection relationships, curvature distributin diagrams, flexural deflections and load-strain relationships are shown and discussed in comparison with the results of the analysis.
