쐐기작용과 프라이거동의 영향을 고려한 확대머리 철근의 TTC 절점 내 정착성능평가

In this study, anchorage capacity of headed bars without transverse reinforcement was evaluated. To conduct evaluation of anchorage capacity in realistic anchorage condition of flexural members, where shear force exists, TTC node test, which can consider the cut-off region, was conducted. The vertical tensile stress occurs by the prying action and the wedge action on the anchorage zone. The test results show that all specimens were failure due to concrete tensile failure around head. In this study, we were analyzed presence of wedge action and prying action impact on the anchorage strength, and focused on the increase ratio of vertical tensile stress caused by using the large diameter bars with big flexural stiffness. As a result of analyzing evaluation on anchorage capacity in TTC Node considering the effect of wedge action and prying action.