SHEAR STRENGTH OF POST-INSTALLED DIAGONAL ANCHOR AND APPLICATION TO SEISMIC RETROFIT FOR CONCRETE STRUCTURES

后锚固锚在既有钢筋混凝土和型钢混凝土建筑抗震加固中得到广泛应用。通常，锚杆垂直安装在混凝土表面中。然而，我们认为，后安装锚使用对角锚杆提高抗剪强度。本研究通过结构试验确定了斜向锚筋后锚固锚的抗剪强度，并提出了各种破坏模式下抗剪强度的评估方法。此外，还对后贴斜锚加固带外翼墙钢筋混凝土柱的结构性能进行了试验研究。试验结果表明，后贴斜锚加固带翼墙钢筋混凝土柱的最大承载力较大。

Post-installed anchor is widely spread for the seismic retrofit in existing RC and SRC buildings. Usually, anchor bars are vertically installed in a concrete surface. However, we think that post-installed anchor using diagonal anchor bars improves shear strength. In this research, we confirmed the shear strength of post-installed anchor using diagonal anchor bars through the structural test, and we proposed the evaluation method of shear strength for various failure modes. In addition, we carried out the structural test to structural performance of RC columns with extended wing wall strengthened by post-installed diagonal anchor. It was found from the tests result that the maximum strength of RC columns with extended wing wall strengthened by post-installed diagonal anchor was large.