I-거더 불연속 비틀림 브레이싱: 횡-비틂 좌굴 및 비틀림 자유진동

• 영문명: I-girder with Discrete Torsional Bracing: Lateral-torsional Buckling and Torsional Free Vibration
• 발행기관: 한국방재학회
• 저자명: 웬 간 투안 문지호 김현수 이학은 Nguyen, Cahn Tuan Moon, Ji-Ho Kim, Hyun-Soo Lee, Hak-Eun
• 간행물 정보: 『3. 한국방재학회 학술대회논문집』2010년, 85~85쪽, 전체 1쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2010.02.25

영문 초록

Discrete torsional bracing systems are widely used in practice to increase the strength of I-girders bridges. This paper proposes equations for lateral-torsional buckling strength, torsional natural frequency and stiffness requirements of I-girders with discrete torsional bracings. Firstly, the equations to calculate the critical moment of the I-girder with discrete torsional bracings are introduced. The proposed equations are then compared with the results of finite element analyses and those from previous studies. The equations to calculate the torsional natural frequency are also presented in the same manner. From the results, it is found that proposed equations agree well with results of finite element analyses regardless of the number of bracing points. Finally, the reduced formula for the total torsional stiffness requirement is proposed for the design purpose.

키워드

torsional bracing lateral-tosional buckling I-girder natural frequency