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Indexed by:期刊论文

Date of Publication:2014-11-01

Journal:ENGINEERING FRACTURE MECHANICS

Included Journals:SCIE、EI、Scopus

Volume:131

Page Number:687-701

ISSN No.:0013-7944

Key Words:Brittle fracture; Concrete; Crack initiation; Environmental cracking; R-curves; Residual stresses; Stress intensity factor; Test standards

Abstract:A new experimental method, utilizing elliptical ring specimens, is developed for assessing the likelihood of cracking and cracking age of concrete subject to restrained shrinkage. To investigate the mechanism of this new ring test, a fracture mechanics-based numerical approach is proposed to predict crack initiation in restrained concrete rings by using the R-curve method. It has been found that numerical results accord well with experimental results in terms of cracking ages for both circular and elliptical concrete rings, indicating that the proposed fracture mechanics-based numerical approach is reliable for analyzing cracking in concrete ring specimens subject to restrained shrinkage. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.