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후좌굴 변단면 기둥의 기하 비선형 해석

Geometrical Nonlinear Analyses of Post-buckled Columns with Variable Cross-section

  • 이병구 (원광대학교 토목환경공학과) ;
  • 김석기 (단국대학교 토목환경공학과) ;
  • 이태은 (원광대학교 토목환경공학과) ;
  • 김권식 (원광대학교 대학원 토목환경공학과)
  • 투고 : 2008.09.23
  • 심사 : 2008.12.15
  • 발행 : 2009.01.31

초록

이 논문은 양단회전 후좌굴 변단면 기둥의 기하 비선형 해석에 관한 연구이다. 기둥의 변단면은 변화폭, 변화깊이, 정방형 변단면으로 채택하였다. Bernoulli-Euler 보 이론을 이용하여 후좌굴 기둥의 정확탄성곡선을 지배하는 미분방정식을 유도하였다. 이 미분방정식은 두 개의 미지수를 가지며 이러한 미분방정식을 풀 수 있는 수치해석 방법을 개발하였다. 후좌굴 기둥의 수치해석 결과로 평형경로, 정확탄성곡선 및 합응력을 산정하였다. 실험을 통하여 후좌굴 거동의 이론을 검증하였다.

This paper deals with the geometrical nonlinear analyses of post-buckled columns with variable cross-section. The objective columns having variable cross-section of the width, depth and square tapers are supported by both hinged ends. By using the Bernoulli-Euler beam theory, differential equations governing the elastica of post-buckled column and their boundary conditions are derived. The solution methods of these differential equations which have two unknown parameters are developed. As the numerical results, equilibrium paths, elasticas and stress resultants of the post-buckled columns are presented. Laboratory scaled experiments were conducted for validating the theories developed in this study.

키워드

참고문헌

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