The paper analyses the interaction between strain-softening and time-dependent behaviour in the case of quasi-static fracture of concrete. A viscous element based on a fractional order rate law is coupled with a micromecanical model for the fracture process zone. This approach makes it possible to include a whole range of dissipative mechanisms in a single rheological element. Creep fracture in mode I conditions is analysed through the finite element method, the cohesive (or fictitious) crack model and a new space and time integration scheme. The comparison with creep tests executed on three-point bending conditions shows a good agreement.
|Titolo:||Creep and Fracture in Concrete: A Fractional Order Rate Approach|
|Data di pubblicazione:||2003|
|Digital Object Identifier (DOI):||10.1016/S0013-7944(02)00041-3|
|Appare nelle tipologie:||1.1 Articolo in rivista|