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论文类型：期刊论文

发表时间：2014-11-01

发表刊物：ENGINEERING FRACTURE MECHANICS

收录刊物：SCIE、EI、Scopus

卷号：131

页面范围：687-701

ISSN号：0013-7944

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

摘要：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.