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发表时间：2022-10-06

发表刊物：水利与建筑工程学报

期号：4

页面范围：168-172

ISSN号：1672-1144

摘要：The restrained ring test recommended by AASHTO and ASTM has been used for assessing the crack resistance of early-age concrete .In order to investigate the fracture mechanics of concrete in the ring test ,shrinkage was simulated through applying the fictitious temperature filed on concrete based on thermal and structural analysis module in ANSYS . Combining with the stress analysis results ,the crack location of concrete ring was determined ,combining with the ficti-tious crack model ,the crack propagation after initiation of ring specimens with circumference exposed was simulated .At the same time ,the proposed method is proved feasible because concrete cracking time from numerical results and experi -mental results agree well .It was found that concrete directly go into unstable propagation stage after crack initiation in the restrained circular ring test ,and the sudden drop of steel compressive strain represents onset of crack unstable propaga -tion .

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