(45)梁曲げ降伏するRC内部梁・柱接合部の力学的挙動への補強筋の影響

概要

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This paper discusses the influence of joint reinforcement on mechanical behavior of interior beam-column joints which fail with flexure of beam and with shear of joint after beam yielding so as to evaluate the requisite amount of joint reinforcement. Experimental work was carried out in order to clarify the role of joint reinforcement. Using the previous experimental data, the influence of the amount of joint reinforcement on envelope curves of story shear-story drift relations after beam flexural yielding is analyzed. The relationship between the joint reinforcement and the deterioration of the joint shear strength after beam flexural yielding is discussed from the shear resistance mechanism. Obtained major findings are as follows: 1)The role of the joint hoop reinforcement is the confinement of concrete in a joint core after beam flexural yielding. 2)Ductility factor of story drift does not depend on the amount of joint reinforcement, but it depends on the input joint shear stress level. 3)As the depth of the concrete compressive zone in beam and column sections at the end of the joint increases with the bond deterioration after beam flexural yielding, the compressive stress in the concrete strut mechanism decreases and the deterioration of joint shear strength gradually progresses.
一般社団法人日本建築学会の論文
1999-03-10