繰返しせん断力を受ける鉄骨鉄筋コンクリート柱の履歴特性に関する実験的研究

Abstract

Tests of two series of steel-reinforced concrete columns with full-web steel section and "buttenplate" type open-web section are made to investigate the hysteretic characteristics involved in thelarge deformation range under constant axial force and alternate repeated bending and shear.One series is designed as a study of the effects of variations in the ratio of maximum momentto shear. The other series is concerned with the effects of variations in the ratio of axial force tothe ultimate compressive strength of column. All specimens are of the rectangular cross section(15 cm x 15 cm). The loading apparatus is designed to meet the state of stress in actual columns.The program of cyclic loading is such that the deflection amplitude is increased and two cyclesof loading are done at each amplitude.Main discussion is concentrated on the maximum strength, the behavior before and afterthe attainment of the maximum strength and hysteretic characteristics involved in the largedeformation range under alternate repeated loading.