KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

An Improved Three-dimensional Finite Element Analysis Model for the Structural Analysis of Cable Stayed Bridges

사장교의 구조해석을 위한 개선된 3차원 유한요소해석모델

Kim, Sun-Hoon;Song, Myung-Kwan;Kim, Kyeong-Ho
김선훈;송명관;김경호

  • Published : 2005.01.31

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Abstract

In this study, the improved three-dimensional analysis model for more accurate analysis of cable stayed bridges is presented. In this improved analysis model, frame elements, of which the stability function is stabilized by the use of Taylor's series expansions, are used to model pylons and girders, and truss elements, of which equivalent modulus of elasticity is evaluated on the assumption that the deflected shape of the cable have the catenary function, are used to model the cable. Nonlinear static analysis is carried out for simple cable supported structures and a three-dimensional cable stayed bridge using the proposed three-dimensional analysis model. The numerical results are compared with the existing results by other researchers and show good agreement. And natural vibration analysis is carried out for a three-dimensional cable stayed bridge and the characteristics of the dynamic behavior are examined.

본 연구에서는 사장교의 보다 정확한 해석을 위한 개선된 3차원 해석모델을 제시하였다. 개선된 3차원 해석모델에서는 사장교의 주탑과 형강의 모형화를 위한 프레임요소의 안정함수를 Taylor 급수 전개를 통하여 안정화시켰으며, 케이블의 모형화 시에는 케이블의 현수선 처짐 형상에 의해 유도된 등가탄성계수를 갖는 트러스 요소를 개발하여 모델링에 사용하였다. 제안된 3차원 해석모델을 이용하여 간단한 케이블지지 구조물과 3차원 사장교에 대한 비선형 정적해석을 수행하였으며 기존의 해석결과와 비교하여 좋은 결과를 나타내었다. 또한 3차원 사장교에 대한 고유진동해석을 수행하여 동적거동 특성을 파악하였다.

Keywords

References

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