chapter
Fracture Models
Pages 51

A FRACTURE MECHANICS MODEL FOR R . C . BEAMS UNDER REPEATED LOADINGS

Andrea CARPINTERI, Francesco ZAUPA

Istituto di Scienza e Tecnica delle Costruzioni,

Universita di Padova, Via Marzolo 9, 35131 Padova, Italy

ABSTRACT

When a reinforced concrete beam cross section is subjected to a cyclic

bending moment, the maximum bending moment being higher than that of

slippage or yielding of steel and lower than that of concrete fracture, a

shake-down phenomenon due to slippage or plastic deformation of the steel

reinforcement occurs. Up to a certain value of the bending moment the

shake-down is elastic; above this value, it becomes plastic and dissipa­

tive .