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Indexed by:会议论文

Date of Publication:2014-01-01

Included Journals:Scopus

Volume:106

Abstract:An elliptical ring test method is proposed to replace circular ring test methods recommended by ASTM and AASHTO for faster and more reliable assessment of the cracking tendency of concrete. A numerical model is also proposed to simulate stress development and crack initiation in restrained concrete rings subject to circumferential drying. Cracking age and position of a series of circular and elliptical, thin and thick rings are obtained from numerical analyses which agree reasonably well with the experimental results. Compared with circular rings, elliptical rings with certain geometry can shorten the ring test duration. It is also found that there are multiple cracks in the elliptical rings with some cracks initiated but not propagated through the concrete ring wall. In thin rings, cracks initiate at their inner circumference and propagate towards their outer one while in thick rings cracks initiate at the outer circumference and propagate towards their inner one. ? Civil-Comp Press, 2014.