コアコンクリートの挙動に着目したRC梁部材のせん断破壊メカニズムに関する実験的研究

概要

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The result of previous experimental models with much shear reinforcement shows the different values from the calculation ones given by the truss-strut model. In this paper, nine specimens are tested under statically loading, and the relation between strength degradation and behavior of core concrete is investigated. To measure the deformation of core concrete, both the strain and the curvature of shear reinforcement for those specimens are calculated. It is found that when the ultimate strength degrades, the stress of truss strut decreases and the expansive deformation of core concrete increases. In addition, the possibility of the compressive failure of concrete strut is investigated using the truss-strut model proposed in the design guidelines of AIJ. Consequently, it is thought that three dimensional deformation of core concrete should be considered to calculate the ultimate shear strength accurately when shear reinforcement does not yield, and then the new shear failure mechanism considering the expansive deformation of core concrete is proposed.
一般社団法人日本建築学会の論文
2004-03-20