Reinforced Concrete Beams Under Load Reversals


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Title: Reinforced Concrete Beams Under Load Reversals

Author(s): Russell H. Brown and James O. Jirsa

Publication: Journal Proceedings

Volume: 68

Issue: 5

Appears on pages(s): 380-390

Keywords: beams (supports) ; bending moments;bond (concrete to reinforcement) : concretes; cyclic loads; deflection; failure mechanisms;reinforced concrete; reinforcing steels: research; shear strength; stirrups; stress-strain relationships.

Date: 5/1/1971

A series of 12 reinforced concrete cantilever beams were subjected to reversals of overload to determine the effect of load history on the strength, ductility, and mode of failure of the beams. The results of the study showed that the behavior of the specimens under load reversal was influenced primarily by shear. Changes in beam geometry or load history which reduced the shear force or increased the shear capacity of the beam significantly increased the energy city and the number of cycles to failure.