Cost optimum design of doubly reinforced concrete beams

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Abstract

An algorithm to calculate the optimum dimensions and the amount of reinforcements for a doubly reinforced rectangular beam is presented. The method is based on ultimate strength design using rectangular stress block for concrete. Dead weight of the beam is incorporated as a variable. Cost of Concrete, cost of steel and cost of formwork are considered. The procedure is based on some logical assumptions made using the available literature on singly reinforced beams. A simple equation to determine whether a doubly reinforced concrete beam is more economical than the singly reinforced cross section has also been presented. A flow chart represents the sequence of operations. A numerical example is worked out to further clarify the design steps involved.

Original languageEnglish (US)
Pages (from-to)219-222
Number of pages4
JournalBuilding and Environment
Volume15
Issue number4
DOIs
StatePublished - Jan 1 1980

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Building and Construction

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