Structural Engineering and Mechanics

  • 제72권4호
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  • Pages.503-512
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  • 2019
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Cost optimization of segmental precast concrete bridges superstructure using genetic algorithm

  • Ghiamat, R. (Civil Engineering group, Pardis College, Isfahan University of Technology) ;
  • Madhkhan, M. (Department of Civil Engineering, Isfahan University of Technology) ;
  • Bakhshpoori, T. (Faculty of Technology and Engineering, Department of Civil Engineering, East of Guilan, University of Guilan)
  • 투고 : 2018.08.21
  • 심사 : 2019.07.09
  • 발행 : 2019.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

The construction of segmental precast concrete bridge is an increase due to its superior performance and economic advantages. This type of bridge is appropriate for spans within 30 to 150 m (100 to 500 ft), known as mega-projects and the design optimization would lead to considerable economic benefits. A box-girder cross section superstructure of balanced cantilever construction method is assessed here. The depth of cross section, (variable along the span linearly), bottom flange thickness, and the count of strands are considered as design variables. The optimum design is characterized by geometry, serviceability, ductility, and ultimate limit states specified by AASHTO. Genetic algorithm (GA) is applied in two fronts: as to the saving in construction cost 8% and as to concrete volume 6%. The sensitivity analysis is run by considering different parameters like span/depth ratio, relation between superstructure cost, span length and concrete compressive strength.

키워드

참고문헌

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