Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Prediction Models for the Prying Action Force and Contact Force of a T-stub Fastened by High-Strength Bolts

고력볼트로 체결된 T-stub의 지레작용력 및 부재 접촉력 예측모델

  • Received : 2013.01.11
  • Accepted : 2013.07.30
  • Published : 2013.08.27
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Abstract

A T-stub connection with high-strength bolts under tensile force is affected by prying action force and the contact force, among others, between members. If a design equation that does not consider such prying action force and contact force between members is not proposed, the T-stub under tensile force is liable to be fractured under the strength lower than the estimated design strength. To prevent it, many studies have proposed contact force estimation equations between members as well as the prying action force of the T-stub connection with high-strength bolts. However, no design equations based on such research have been proposed in South Korea. Therefore, this study aims to propose an estimation model for more accurate prying action force and contact force, and improve on previously proposed estimation models by implementing the three-dimensional, nonlinear finite element analysis. Throughout the results of three-dimensional, nonlinear finite element analysis, the prediction model proposed in this research for the prying action force and contact force of a T-stub provided much more accurate estimation than that of a existing prediction model previously suggested.

인장력을 받는 고력볼트로 체결된 T-stub는 지레작용력과 부재 사이의 접촉력 등의 영향을 받는다. 이러한 지레작용과 부재 사이의 접촉력 등이 고려된 설계식이 제안되지 않는 경우, 인장력을 받는 T-stub는 예측한 설계강도 보다 더 작은 강도에도 파괴될 가능성이 있다. 이를 방지하기 위하여 지금까지 많은 연구를 통하여 고력볼트로 체결된 T-stub의 지레작용력과 부재 사이의 접촉력 예측모델이 제안되었다. 그러나 아직도 우리나라에서는 이를 반영한 설계식의 제안이 이루어지고 있지 않다. 따라서 이 연구는 3차원 비선형 유한요소해석법을 적용하여 그동안 제안된 예측모델을 개선한 보다 정확한 지레작용력 및 접촉력 예측모델을 제안하고자 진행하였다. 3차원 비선형 유한요소 해석 결과, 이 연구에서 제안한 지레작용력 및 접촉력 예측모델은 기존의 예측모델보다 더 근사적인 예측값을 제공하였다.

Keywords

References

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