鉄骨鉄筋コンクリートに関する実験的研究(その4) : 剪断力を受ける梁の実験

概要

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Many tests on beams subject to shear have been held abroad, but the character of beams subject to bending has not yet been cleared. On the composite section which is our object of study, the conditions of failure are more complicated than those of ordinary reinforced concrete and there have been only a few experimental investigations held in Japan. In this investigation, we initially held shearing tests on ordinary reinforced concrete sections and investigated its characteristics. Next, we conducted tests on composite sections of the same size as those initially tested and investigated the cooperative action of the steel section as well as the ultimate strength of the beams. We specified several groups within which elements governing the shearing strength of beams were individually varied. The relation between the elements and shearing strength τ=Q/bj for concrete reinforced with bars are shown in Fig.3・9〜3・15. The experimental formula obtained for concrete reinforced with bars are (3・9) and (3・9)' and after simplification become (3・10) and (3・10)' which are for small and middle size respectively. The experimental formula obtained for composite beam are (3・11)' and (3・11)" which are for middle size and large size respectively. The effect of the amount of tie plates is similar to the case of the stirrups but efficiency is rather low being only about one-half that of stirrups.
社団法人日本建築学会の論文
1957-03-25