An Evaluation on the Shear Strength of New Type Shear Connectors for a Simple Steel-Concrete Composite Deck

초간편 강합성 바닥판 신형식 전단연결재의 전단내력 평가

  • 윤기용 (선문대학교 토목공학과) ;
  • 김상섭 (한국기술교육대학교 건축공학과) ;
  • 한득천 (선문대학교 토목공학과)
  • Received : 2008.02.12
  • Accepted : 2008.08.10
  • Published : 2008.08.10

Abstract

A simple steel-concrete composite deck is developed for preventing the lateral torsional buckling of girders that are under construction and for reducing the term of works using H-shaped rolled beams as bridge girders. A new type of shear connectors is also developed for the composite behavior between a simple steel-concrete composite deck and the rolled beams by the connecting conditions between the deck and the girders. One is a connector bolt that is lengthened and split or tightened with two nuts and the other is an I-shaped rolled beam welded on a steel plate with a number of holes punched through the web. In this study, to estimate the shear strength of those shear connectors the push-out tests are performed and the test results are compared with that of the previous studies and the codes. The result of the push-out tests of the connector bolts showed that the shear performance is similar to that of the stud connector and revealed that the equation for the shear strength in the Korean Specification of Highway Bridge overestimates the shear capacity of the connector bolt whose diameter is larger than 19mm. From the push-out tests of punched I-shaped rolled beams with varying welding amounts, with the small amount of welding, shear capacity is governed by the shear capacity of welding. On the other hand, shear capacity is governed by the size of the punched I-shaped rolled beams, regardless of the amount of welding.

Acknowledgement

Supported by : 한국건설교통기술평가원

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