KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Initial Shape Determination of Steel Cable-Stayed Bridges Using Nonlinear Analysis

비선형 해석을 이용한 강사장교의 초기형상 결정

Song, Weon-Keun;Kim, Sung-Eock;Ma, Sang-Soo
송원근;김승억;마상수

  • Published : 2005.01.31

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Abstract

A method of initial shape analysis of steel cable-stayed bridges using nonlinear analysis procedure is presented. A geometrical nonlinear analysis considering updated structural configuration is conducted for determining an initial equilibrium static state. The geometrical nonlinearity by using the stability function is considered for beam-column members. Cable sag effect is considered by the use of an equivalent modulus of elasticity for cable members. Verifications of a three-dimensional steel frame and of a cable member subjected to tensile force are presented. Case studies are illustrated for two and three dimensional fan type steel cable-stayed bridges. Iteration continues until the magnitudes of nodal displacement become less than a prescribed acceptable limit.

본 논문에서는 비선형 해석을 이용한 강사장교의 초기형상해석 방법을 제시하였다. 초기형상해석을 위하여 각 단계마다 개선된 구조형상을 고려한 기하학적 비선형 해석을 수행하였다. 이를 위하여 보-기둥 부재는 안정함수가 사용되었으며 케이블 새그(sag)로 인한 비선형성은 등가탄성계수를 사용하여 고려하였다. 3차원 보-기둥 요소로 형성된 강뼈대 구조물과 양단수평하중을 받는 케이블 부재를 사용하여 수치해석 결과의 신뢰성을 검증하였다. Fan type 2차원 강사장교와 3차원 강사장교에 대해 각각 예제 해석을 수행하였다. 모든 절점 변위 값의 합이 허용치를 만족하면 초기형상해석이 종료되도록 하였다.

Keywords

References

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