Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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A Study on the Nonlinear Instability Behavior of Hybrid Structures(II) -Characteristic of Dynamic In-Plane Torsional Buckling under the STEP Load-

Hybrid 구조물의 비선형 불안정 거동에 관한 연구(II) -STEP 하중에서의 동적 면내비틀림 좌굴 특성-

  • Received : 2001.04.02
  • Published : 2001.10.27
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Abstract

Many papers which deal with the dynamic instability of shell-like structures under the STEP load has been published but there have been few papers related to the dynamic instability of hybrid cable domes. And also there are a few researches which treat the essential phenomenon of the dynamic buckling using the phase for investigating occurrence of chaos. In this study the indirect buckling of hybrid cable domes considering geometric nonlinearity are investigated numerically and compared it with the static critical load The dynamic critical loads are determined by the numerical integration of the geometric nonlinear equation of motion and the mechanism of the indirect buckling is examined by using the phase curves.

STEP 하중을 받고 있는 쉘형 구조물의 동적 불안정 문제를 다룬 연구 결과는 다소 발표되고 있으나 Hybrid 케이블 돔의 동적 불안정 문제를 다룬 연구는 아직 없는 실정이다. 또 카오스의 생성을 파악하기 위하여 위상면을 이용하여 동적 좌굴의 기본적 현상을 다룬 연구도 거의 없다. 본 연구에서는 기하학적 비선형을 고려한 Hybrid 케이블 돔의 간접좌굴을 수치적 기법으로 조사하고 이를 정적 임계하중과 비교하였다. 동적 좌굴하중은 비선형 운동방정식을 수치분석하여 결정하고 위상면을 이용하여 간접좌굴 현상을 규명한다.

Keywords

Acknowledgement

Supported by : 초대형 구조시스템 연구센터(STRESS)

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