Reinforced concrete (RC) buildings built in the 1980s are vulnerable to seismic behavior because they were designed without any consideration of seismic loads. These buildings have widely spaced transverse reinforcements and a short lap splice length of longitudinal reinforcements, which makes them vulnerable to severe damage or even collapse during earthquakes. The purpose of this study is to investigate the impact of bidirectional lateral loads on RC columns with deficient reinforcement details. An experimental test was conducted for two full-scale RC column specimens. The test results of deficient RC columns revealed that bidirectional loading deteriorates the seismic capacity when compared with a column tested unidirectionally. Modeling parameters were extracted from the tested load-displacement response and compared with those proposed in performance-based design standards. The modeling parameters proposed in the standards underestimated the deformation capacity of tested specimens by nearly 50% and overestimated the strength capacity by 15 to 20%.

A B S T R A C T
1. 서 론
2. 짧은 겹침이음을 갖는 RC 기둥 실험 계획
    2.1 실험 계획
    2.2 실험체 설치
3. 균열 및 파괴양상
4. 실험체의 하중-변위 응답
    4.1 최대강도 및 최대변위비 비교
    4.2 하중-변위 응답
    4.3 부착강도 저하
    4.4 강성 저하 및 에너지 소산
5. 모델링파라메터 비교
6. 결 론
REFERENCES

• 이창석(한양대학교 건축공학과) | Lee Chang Seok (Department of Architectural Engineering, Hanyang University) Corresponding author
• 박이슬(한양대학교 건축공학과) | Park Yi Seul (Department of Architecture Engineering, Hanyang University)
• 한상환(한양대학교 건축공학과) | Han Sang Whan (Department of Architectural Engineering, Hanyang University)