Optimum Design of Composite Framed Structures Based Reliability Index

신뢰성지수를 고려한 합성 뼈대구조물의 최적설계에 관한 연구

  • 정영채 (군산대학교 토목환경공학부) ;
  • 김종길 (군산대학교 토목공학과)
  • Received : 2003.05.02
  • Accepted : 2003.07.01
  • Published : 2003.08.27

Abstract

The purpose of this study is to develop an algorithm, which can be designed the optimal sections of the composite framed structures constituted with the beams and the columns consisted of H type of steel section and concrete considering the reliability index. The optimized problem or the composite framed structures is formulated with the objective function and the constraints taking the section sizes as the design variables. The objective functions are constituted by the total costs of constructions. Also, the constraints are derived by considering the reliability index of section stress and allowable stress. The algorithm optimized the section of the composite framed structures utilizes the SUMT method using the modified Newton-Raphson direction method. The optimizing algorithm developed in this study is applied to the numerical examples with respecting a one-bay, one-story composite framed structure and a one-bay five-story one for the practical utilization of design on the composite framed structures using the reliability indices$({\beta})$ three and zero. In addition, their numerical results are compared and analyzed to examine the possibility of optimization the applicability, and the convergence this algorithm.

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