Title: Optimization of Reinforced Fibrous Concrete Beams

Author(s): A. Samer Ezeldin and Cheng-Tzu Thomas Hsu

Publication: Structural Journal

Volume: 89

Issue: 1

Appears on pages(s): 106-118

Keywords: beams (supports); flexural strength; metal fibers; microcomputers; optimization; reinforced concrete; shear strength; Structural Research

DOI: 10.14359/1273

Date: 1/1/1993

Abstract:
Steel fiber reinforced concrete is increasingly used as a construction material. Studies have shown that steel fibers can be used to increase the bending moment capacity and shear strength of reinforced concrete beams. A computer algorithm that analyzes the combined contribution of steel fibers to flexural and shear strengths of reinforced fiber concrete beams is presented. The algorithm conducts a systematic direct search in the space of six variables--beam width, beam depth, fiber content, bending reinforcing bars, shear stirrups, and stirrup spacing--to yield an optimum solution for a given cost objective function. The algorithm can simplify the combined use of concrete, conventional reinforcement, and steel fibers as construction materials.