鋼繊維とせん断補強筋との複合抵抗機構に基づく鋼繊維補強鉄筋コンクリート柱のせん断耐力

概要

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There have been reported many reserches on effectiveness of steel fibers on structural performance of concrete members. However, there has been no research which presents shear reinforcement mechanism of steel fibers in reinforced concrete members with both of conventional web reinforcement and steel fibers This paper describes a method for evaluating effects of steel fibers on the shear capacity of rein- forced concrete columns with steel fibers in addition to conventional hoop bars. The significant points in this paper are as follows : 1) The shear capacity shared by steel fibers was assumed to be the pullout capacity of steel fibers across diagonal cracks, which was evaluated with use of the results obtained from the direct tension tests on steel fiber reinforced concrete. 2) It has been verified that the shear capacity by steel fibers can be considered to be additional to the shear capacity of conventional reinforced concrete column with hoops alone. 3) The method is useful in shear design for ensuring ductility of columns, because the additional shear capacity can be estimated according to the allowable width of diagonal cracks related to the strain level of hoop bars which is considered as a measure of the ductility of column.
社団法人日本建築学会の論文
1990-04-30