高強度コンクリートと高強度鉄筋を用いた十字型柱・梁接合部に関する実験的研究

概要

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Cyclic load tests on eight, half-scale interior beam-column subassemblages, each utilizing high strength materials, were carried out to investigate seismic behavior under high joint shear stress (t_p= 140-200 kg/cm^2). Concrete having three levels of specified compressive strength, 400, 600 and 800 kg/cm^2 was used. High-strength reinforcing bars with yield strength of 4 000 and 6 000 kg/cm^2 were provided for beam longitudinal reinforcement. Reinforcing bars with a yield strength of 8 700 kg/cm^2 were also used for joint reinforcement. In order to prevent premature shear failure in joints and significant slippage of beam bars through joints, four different types of joint detail were planned. The beam-column joints using 600 kg/cm^2 high-strength concrete or higher showed ductile behavior up to 5 % of story drift even under high joint shear stress^ No significant bar slippage nor bond deterioration was observed even in the joints using high-strength beam main bars. Based, on the test results, guidelines for the design of such R/C beam-column joints are presented in this paper.
社団法人日本建築学会の論文
1991-05-30