Journal of Korean Association for Spatial Structures (한국공간구조학회논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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A Study on Optimum design of Corrugated web girder using Eurocode

유로코드를 이용한 주름웨브보의 최적설계 연구

  • Shon, Su-Deok (School of Arch. Eng., Korea Univ. of Tech. & Education) ;
  • Yoo, Mi-Na (School of Arch. Eng., Korea Univ. of Tech. & Education) ;
  • Lee, Seung-Jae (School of Arch. Eng., Korea Univ. of Tech. & Education)
  • 손수덕 (한국기술교육대학교 건축공학부) ;
  • 유미나 (한국기술교육대학교 대학원, 건축공학부) ;
  • 이승재 (한국기술교육대학교 건축공학부)
  • Received : 2012.08.20
  • Accepted : 2012.11.30
  • Published : 2012.12.15
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Abstract

This paper describes the structural design and optimization of sinusoidally corrugated web girder by using EUROCODE (EN 1993-1-5). The optimum design methodology and characteristics of the optimal cross-section are discussed. We investigate a shear buckling and the concerned standards for corrugated web and explain the equations to obtain a critical stress according to buckling type. In order to perform optimization, we consider an objective function as minimum weight of the girder and use the constraint functions as slenderness ratio and stresses of flanges as well as corrugated web and deflection. Genetic Algorithm is adopted to search a global optimum solution for this mathematical model. For numerical example, the clamped girder under the concentrated load is considered, while the optimum cross-sectional area and design variables are analyzed. From the results of the adopted example, the optimum design program of the sinusoidally corrugated web girder is able to find the suitable solution which satisfied a condition subject to constraint functions. The optimum design shows the tendency to decrease the cross-sectional area with the yielding strength increase and increase the areas with load increase. Moreover, the corrugated web thickness shows a stable increase concerning the load.

Keywords

References

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