The paper summarises research about the behaviour of concrete in the case of quasi-static fracture and presents some new results about size effects on failure lifetime. The interaction between strain-softening and time-dependent behaviour is examined by means of a viscous rheological element (based on a fractional order rate law) coupled with a micromechanical model for the fracture process zone. Creep fracture in mode I conditions is analysed through the finite-element method and the cohesive crack model. Creep tests executed on three-point bending conditions (at different load levels) are investigated to assess the influence of specimen size on failure lifetime.
Failure lifetime of concrete structures under creep and fracture / Barpi, Fabrizio; Valente, Silvio. - In: MAGAZINE OF CONCRETE RESEARCH. - ISSN 0024-9831. - STAMPA. - 63:5(2011), pp. 371-376. [10.1680/macr.9.00159]
Failure lifetime of concrete structures under creep and fracture
BARPI, Fabrizio;VALENTE, Silvio
2011
Abstract
The paper summarises research about the behaviour of concrete in the case of quasi-static fracture and presents some new results about size effects on failure lifetime. The interaction between strain-softening and time-dependent behaviour is examined by means of a viscous rheological element (based on a fractional order rate law) coupled with a micromechanical model for the fracture process zone. Creep fracture in mode I conditions is analysed through the finite-element method and the cohesive crack model. Creep tests executed on three-point bending conditions (at different load levels) are investigated to assess the influence of specimen size on failure lifetime.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2413717
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