Journal of Korean Association for Spatial Structures (한국공간구조학회논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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Dynamic Buckling Characteristics of 3-Free-Nodes Spatial Truss Model Under the Step Load

스텝 하중을 받는 3-자유절점 공간 트러스 모델의 동적 좌굴 특성

  • 손수덕 (한국기술교육대학교 건축공학과) ;
  • 황경주 (서울시립대학교 건축학부)
  • Received : 2020.03.28
  • Accepted : 2020.04.17
  • Published : 2020.06.15
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Abstract

In this paper, the dynamic snapping of the 3-free-nodes spatial truss model was studied. A governing equation was derived considering geometric nonlinearity, and a model with various conditions was analyzed using the fourth order Runge-Kutta method. The dynamic buckling phenomenon was observed in consideration of sensitive changes to the force mode and the initial condition. In addition, the critical load level was analyzed. According to the results of the study, the level of critical buckling load elevated when the shape parameter was high. Parallelly, the same result was caused by the damping term. The sensitive asymmetrical changes showed complex orbits in the phase space, and the critical load level was also becoming lowly. In addition, as the value of damping constant was high, the level of critical load also increases. In particular, the larger the damping constant, the faster it converges to the equilibrium point, and the occurrence of snapping was suppressed.

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References

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