In the moment frame subjected to earthquake loads, beam-column joint is structurally important for ductile behavior of a system. ACI Committee 352 proposed guidelines for designing beam-column joint details. The guidelines, however, need to be updated because of the lack of data regarding several factors that may improve the performance of joints. The purpose of this study is to investigate the seismic performance of reinforced concrete exterior joints with high-strength materials and unbonded tendons. Three specimens with different joint shear demand-to-strength ratios were constructed and tested, where headed bars were used to anchor the beam bars into the joint. All specimens showed satisfactory seismic behavior including moment strength of 1.3 times the nominal moment, ductile performance (ductility factor = at least 2.4), and sufficiently large dissipated energy.

1. 서 론
 2. 실험체의 내진설계
  2.1 실험체 개요
  2.2 재료
  2.3 접합부 전단강도비
  2.4 접합부 구속 철근량과 간격
  2.5 주근의 정착 길이
  2.6 비부착 강연선
 3. 실험체 세팅 및 측정 계획
  3.1 실험체 세팅
  3.2 가력 계획
  3.3 계측 세팅
 4. 내진실험 결과 및 분석
  4.1 모멘트-층간변위 관계
  4.2 균열 및 파괴 양상
  4.3 접합부의 전단 변형
  4.4 철근의 변형률
  4.5 비부착 강연선의 거동
  4.6 ACI 374.1-05에 따른 평가
 5. 결 론
 / 감사의 글 /
 / REFERENCES /

• 권병운(서울대학교 건축학과) | Kwon, Byung Un
• 강현구(서울대학교 건축학과) | Kang, Thomas H.-K Corresponding author