In this study, an algorithm is developed for the optimum design of reinforced concrete frames. The design method treats the depth of cross-section of members, the area of bending and shear reinforcements as design variables while keeping the width of the section as constant. The algorithm minimizes the overall cost of reinforced concrete frames which includes the cost of concrete, reinforcement and formwork. It considers the moment and shear capacity constraints of members as well as displacement limitations. These restrictions are included in the design problem as they are defined in British Standard 8110. The solution of design problem is obtained using a mixed algorithm in two stages. In the first, the ultimate design constrains are assumed to be dominant and displacement constrains are excluded from the design problem. The optimum solution of this problem is obtained by using the sequential linear programming technique In the second, the displacement constrains are considered to be dominant and the ultimate strength constraints are excluded from the design problem. The optimality criteria method is employed to obtain the solution of this problem The greater values of design variables in two phases are adopted as the new values in the next design cycle. The experience obtained from the design examples considered has shown that up to 30 percent of saving is possible to achieve over normal design using BS 8110.

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £65 +P&P)