비가새 강구조 골조 기둥재 설계식의 B₂계수 평가 = The Evaluation of B₂ Factor in Beam-Column Formula in the Case of Unbraced steel Frames

다국어 초록 (Multilingual Abstract)

The objective of this study is to evaluate the validity of B₂factor in beam-column equations of limit state design code of steel structures in Korea(LSD). B₂factor is a moment amplification factor that considers P-Δ effect of beam-columns. However, it is not clearly defined that the effect of B₂factor in various cases. Therefore, B₂factor need to evaluate the validity in various cases.
The two-dimensional second order elastic analysis was performed in the case of symmetric frames in this study. The results of analysis are compared with the results of LSD code that B₂factor is used to verify the validity of it. The parameters of study are the length of inner span, the height of base story and the ratio of axial and lateral load.
The results show that B₂factor properly considers P-Δ effect in the bottom part of frames but it does not in the middle part of frames.

목차 (Table of Contents)

• 1.서론
• 1.1 연구의 방법
• 2.B₂계수의 이론적 배경
• 3.연구대상 변수 및 해석과 기준식에의 적용
• 3.1 연구대상 골조
• 3.2 연구대상 변수
• 3.3 2차탄성해석 적용
• 3.4 LSD의 B₂계수 적용
• 4.결과 분석
• 4.1 Case 1의 경우
• 4.2 Case 2의 경우
• 4.3 Case 3의 경우
• 4.4 Case 4의 경우
• 4.5 Case 5의 경우
• 4.6 Case 6의 경우
• 4.7 Case 7의 경우
• 4.8 B₂계수의 P-Δ효과 과소평가
• 4.9 기둥재의 열의 변화에 따른 영향
• 5.결론