Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Experimental Study on the Top- Lateral Bracing of U-Type Steel Box Girders Using Real Size Specimen: Torsional Stiffness

실물모형 시험를 이용한 U형 강박스거더의 상부 수평브레이싱에 관한 실험적 연구: 비틂강성

  • 심낙훈 (명지대학교 토목환경공학과) ;
  • 박영석 (명지대학교 토목환경공학과)
  • Received : 2006.04.12
  • Accepted : 2006.07.05
  • Published : 2006.08.27
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Abstract

In this study, a torsional test for U-type steel box girders was performed to observe the effects of the kind of panel for top lateral walateral bracings on the torsional behavior of the U-type steel girder system. For the structural tests, the test specimen with a two-thirds scale of the system actually constructed in the field was used. In the torsional test to observe the efects of top lateral bracings, the most economical arrangement of the top lateral bracing was found to be the panel width to length ratio of 1:1.5 with the inclined angle of $40^{\circ}$.

본 논문에서는 실내실험을 통하여 U형 강박스거더의 상부 수평브레이싱이 비틂거동에 미치는 영향을 파악하고 기존의 제안식에 대한 적정성을 검토하기 위하여, 실제 시공되고 있는 U형 강박스거더 단면 크기의 2/3 정도 되는 캔틸레버보 형식의 시험체를 제작하여 상부 수평브레이싱의 형태 및 패널 간격에 따른 비틂강성의 효과를 파악하였다. 그 결과, 상부 수평브레이싱을 설치함으로써 거더의 비틂강성이 상당히 증가함을 알 수 있었으며, 브레이싱의 패널 구성을 가장 경제적으로 설계하기 위해서는 폭과 길이의 비가 약 1:1.5 즉, 대각선브레이싱과 상부 플랜지의 경사 예각이 약 $40^{\circ}$로 설치하는 것이 바람직할 것으로 판단되었다.

Keywords

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