Effects of Increasing Concrete Strength on the Dimension of Beams

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Title: Effects of Increasing Concrete Strength on the Dimension of Beams

Author(s): H.J. Pam, H. Tanaka and R. Park

Publication: Special Publication

Volume: 176

Issue:

Appears on pages(s): 197-212

Keywords: Concrete; durability; fly ash; high performance; permeability; porosity;strength

Date: 10/1/1998

Abstract:
A theoretical study was carried out to investigate the effects of increasing concrete strength on the depth of rectangular beams. Two series of beams were investigated. The first series comprised reinforced concrete beams with spans from 6 to 15 m, and the second comprised prestressed concrete beams with spans from 12 to 30 m. The concrete strength ranged from 20 to 120 MPa and from 30 to 120 MPa for the reinforced and prestressed concrete beams, respectively. The results show that for rectangular concrete beams, an increase in concrete strength results in a rather significant reduction in the beam depth, whereas for rectangular prestressed concrete beams no significant reduction in the beam depth is gained from increasing the concrete strength because the deflection governs the design.