Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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A Numerical Study on the Static Strength of Tubular X-Joints With an Internal Ring Stiffener

환보강 X형 관이음부의 정적강도에 관한 수치적 연구

  • Published : 2005.09.01
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Abstract

The objective of this paper is to numerically assess the behavior of tubular X-joints with an internal ing stiffener, and to evaluate the reinforcement effect of a ring stiffener, and to establish the strength formulae. Nonlinear finite element analysis is used to compute the static strength of axially loaded tubular joints. Numerical and experimental results are in good agreement for tubular X-joints. The chord lengths of simple and ring-stiffened X-joints are suggested to reduce chord end effect. And, internal ring stiffener is found to be efficient In improving static strength of tubular X-joints. Maximum strength ratios are calculated as $1.5\sim3.5$. Regression analyses are performed considering practical size of ring stiffener and strength estimation formulae for tubular X-joints with an internal ring stiffener are proposed.

본 논문의 목적은 내부환보강 X형 관이음부의 거동을 수치적으로 평가하여 환보강재의 보강효과를 규명하고, 강도 산정식을 제안하는 것이다. 축방향력을 받는 관이음부의 정적강도를 산정하기 위해 비선형 유한요소해석을 수행하였다 유한요소해석 결과는 실험결과와 잘 일치하였고, X형 관이음부의 주부재 단부효과를 감소시킬 수 있는 주부재의 적정길이를 제시하였다. 내부 환보강재는 단순 X형 관이음부의 정적강도를 증가시키는데 효율적임이 판명되었고, 최대 보강효과를 나타내는 최대강도비가 1.5에서 3까지 산정되었다. 환보강재의 실용적 크기를 고려한 이음부에 대해 유한요소해석 결과를 이용하여 회귀분석을 실시하고 내부 환보강 X형 관이음부의 강도산정식을 제안하였다.

Keywords

References

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