This study proposes empirical formulas for predicting the nonlinear behavior of GIR beam-to-column connections in timber structures to evaluate their structural performance. A database comprising 59 experimental results of GIR connections was collected, and the normality of data distribution was verified. Statistical analysis were conducted to investigate the correlations between input and output parameters. Based on input parameters with high correlation, derived variables were formulated and utilized in a multiple regression analysis to develop empirical formulas for moment capacity and rotation. The R-squared values of the proposed formulas exceeded 0.9, and the predicted initial stiffness and strength closely matched those of experimental results not used in the regression analysis. So the suggested empirical formulas exhibit excellent predictive performance for the nonlinear behavior of GIR beam-to-column connections in timber structures.

Abstract
1. 서론
2. GIR 접합부 거동 특성 영향요인
    2.1 GIR 접합부 실험 데이터베이스
    2.2 예측식 도출을 위한 영향요인 분석
3. GIR 접합부의 비선형 거동 예측
    3.1 하중-변위 응답 모델 매개변수 예측
    3.2 모델 매개변수 예측식의 검증
4. 결론
감사의 글
References

• 강성훈(부산대학교 건축공학과, 박사과정) | Kang Seong-Hun (Dept. of Architectural Engineering, Pusan National University)
• 김지훈(부산대학교 건축공학과, 학사과정) | Kim Ji-Hun (Dept. of Architectural Engineering, Pusan National University)
• 정현재(부산대학교 건축공학과, 학사과정) | Jeong Hyeon-Jae (Dept. of Architectural Engineering, Pusan National University)
• 오근영(한국건설기술연구원, 수석연구원, 공학박사) | Oh Keun-Yeong (Korea Institute of Civil Engineering and Building Technology)
• 이태훈(부산대학교 건축공학과, 석사과정) | Lee Tae-Hun (Dept. of Architectural Engineering, Pusan National University)
• 신동현(부산대학교 건축공학과 조교수, 공학박사) | Shin Dong-Hyeon (Dept. of Architectural Engineering, Pusan National University) Corresponding author