Fracture criteria for concrete: Mathematical approximations and experimental validation

✍ Scribed by J. Planas; M. Elices

• Book ID: 103072349
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 684 KB
• Volume: 35
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(90)90186-k

✦ Synopsis

Three well known fracture models (Cohesive Crack, Bazant's Size-Effect Law, and Two-Parameter Shah's Model) were analysed, and their size-effect prediction compared in the light of general and asymptotic size-effect equations previously developed by the authors. For notched three point bend specimens of usual laboratory sizes, the three fracture criteria are experimentally indistinguishable when usual scatter values are taken into account. For larger sizes, the fracture loads predicted by the models diverge appreciably and in the asymptotic limit Shah's and Bazant's model are more conservative than the Cohesive Crack Model by roughly 30%.