In this study, load transfer tests based on KCI-PS101 were conducted to verify the performance of spiral anchorage zone reinforcement for banded post-tensioning (PT) monostrands. With results, the compressive strength of spiral reinforcement was increased by about 20% than that of specimens with two horizontal steel bars and 8% than that of U-shaped bars. Advanced spiral reinforcement for corner increases compressive strength and can resist the spalling forces or fall-out effect at the corner by shear. The ratio of maximum load to amount of steel of the spiral reinforcement is about twice than that of U-shaped reinforcement. With increase of compressive strength capacity and improvement of constructability, the spiral reinforcement is considered to have advantages of promoting the performance of PT anchorage zone compared to conventional methods.

The objective of this study is to propose methods to design and analyze a catenary shell using a computer program without experiments and measurements. The intial idea stems from Pendergrast’s study, but his method should be improved. In this study, the process of making catenary shell using computer was reproduced by Grasshopper script. In order to enhance credibility, two models from Grasshopper script were analyzed by SAP2000; one was just a square-based catenary shell, while the other was the re-created shell originated from the Naturtheater Grötzingen. The outcome of analysis was reasonable.

KBC 2016 및 ACI 318-08에서 확대머리 철근의 순간격에 대한 지나치게 엄격한 요구 사항을 개선하기 위해 2/3 스케일의 외부 보- 기둥 접합부 실험체를 준정적 반복 하중을 적용하여 실험을 수행하였다. 내진 실험을 통해 좁은 간격의 철근 순간격과 다열 배치 확대머리 철근 적용여부를 주요 변수로 하여 내진 성능에 미치는 영향을 검토하였다. 또한, 본 실험결과를 이전 연구자들의 실험 데이터와 함께 면밀히 분석하였다. 결론적으로 외부 보-기둥 접합부에 정착된 확대머리 철근에 대해 2db의 철근 순간격 또는 2 개층의 확대머리 철근의 사용은 내진 설계에 있어 허용될 수 있는 것으로 판단된다.