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Cost-optimum design for shear reinforced concrete beams
Faculty
Engineering
Year:
1999
Type of Publication:
Article
Pages:
122-126
Authors:
Azmy, AM, Eid, MH
Journal:
ACI STRUCTURAL JOURNAL AMER CONCRETE INST
Volume:
96
Research Area:
Construction \& Building Technology; Engineering; Materials Science
ISSN
ISI:000079857700014
Keywords :
beams, optimization, reinforced concrete, shear, stirrups, structural design
Abstract:
An optimization procedural method for the shear design of rectangular beams is presented. The optimization procedure is formulated as finding the minimum cost of design with constraints imposed based on ACI code provisions. The cost of concrete, shear reinforcement, and formwork is included in the formulation of the objective function. The behavioral constraints, i.e., ACI requirements for shear strength, and practical constraints, ie., cross-sectional dimensions of beams, are included in the formulation. A closed-form solution of the optimization problem expresses the optimal values of the shear reinforcement, spacing, and section dimensions in terms of material costs, strength and ductility parameters. A complete flow chart and a computer program of the algorithm is presented and several numerical examples are given to show the validity of the proposed optimization method.
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