Proposal of Shear transfer mechanism between the anchor bolt and RC footing beam

采用许用应力的概念，对基础配筋和墙体配筋的钢筋混凝土构件的结构性能进行了估算。因此，该等估值方法并无考虑改装表现。为了澄清单层抗剪钢筋混凝土构件结构性能评价中的一个问题，对采用180 °弯钩和屈服抗剪强度钢筋单元作为抗剪钢筋的梁进行了弯剪试验，掌握了其结构性能。此外，通过与钢筋约束的钢筋混凝土梁构件试验结果的对比分析，指出了传统的抗拉强度估算方法存在的问题：对于后锚固件的抗拉强度，抗拉强度的设计形式使混凝土强度成为重要的影响因素。然而，混凝土强度对后锚固锚锚固的影响及锚固机理还存在许多未知点。此外，近年来，高层住宅等大量使用高强混凝土，施工下的可用性和结构性能的评估是一个重要的课题。为了评估后安装锚的抗拉强度，本文旨在阐明嵌入混凝土中的机械和粘结锚的结构性能。作为结论，获得了以下知识。粘结锚的破坏形式为混凝土锥体和预埋锚侧粘结劈裂破坏。粘结锚在混凝土角破坏模式下的抗拉试验值略小于常规估值方案的计算值，在劈裂粘结破坏模式下的抗拉试验值较小。

The structure performance of RC members with one layer of shear reinforcement used by the RC foundations and the wall RC members is estimated on Allowable stress concept. Therefore, the modification performance is not taken into consideration by those valuation methods. In this paper, in order to clarify a problem when evaluating the structure performance of RC members with one layer of shear reinforcement, the flexural-and-shear experiment of the beam which used 180-degree hook and the steel unit with yielded shear strength for the shear reinforcement was conducted, and structure performance has been grasped. Moreover, the problem when applying the conventional valuation method was shown by comparing with the experimental result of RC beam component confined the shear reinforcement.As for the tensile resistance of these post-installed anchors, the design type of tensile resistance makes strength of concrete the important factor. However, many unknown points are left behind about the influence strength of concrete has on the embedment and the bond resistance mechanism of a post-installed anchor. Furthermore, high strength concrete is used abundantly by the high-rise apartment building etc. in recent years, and evaluation of the usability under the construction and structural performance is an important subject.In order to estimate the tensile resistance of the post-installed anchor, this paper aims at clarifying about the structural performance of the mechanical and bonded anchor embedded in concrete.As a conclusion, the following knowledge was acquired. The failure mode of bonded anchor is concrete cone and the splitting bond failure by the side of the embedded anchor. The experimental tensile resistance of the bonded anchor in the case of concrete corn failure mode is slightly smaller than the calculated value of a conventional valuation plan, and it in the case of splitting-bond failure is small.