Crack Control Design of R/C Beams in Flexure


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Title: Crack Control Design of R/C Beams in Flexure

Author(s): W. M. Ashmawi, M. H. Baluch, and a. K. Azad

Publication: Special Publication

Volume: 134


Appears on pages(s): 133-146

Keywords: beams (supports); cracking (fracturing); crack propagation; crack width and spacing; fracture properties; models; moments; tension; reinforced concrete; Design

Date: 9/1/1992

Proposes a fracture mechanics approach to crack control design of reinforced concrete beams in flexure (Mode I). The model yields the minimum area of tension steel required of a concrete beam of rectangular cross section to safely sustain a design moment within the prescribed limit of permissible crack height. An iterative procedure is developed by satisfying simultaneously the fracture criterion of crack growth and the equilibrium condition at incipient fracture.