Techno Press
Techno Press

Computers and Concrete   Volume 9, Number 1, January 2012, pages 1-19
DOI: http://dx.doi.org/10.12989/cac.2012.9.1.001
 
Size-effect of fracture parameters for crack propagation in concrete: a comparative study
Shailendra Kumar and S.V. Barai

 
Abstract     [Full Text]
    The size-effect study of various fracture parameters obtained from two parameter fracture model, effective crack model, double-K fracture model and double-G fracture model is presented in the paper. Fictitious crack model (FCM) for three-point bend test geometry for cracked concrete beam of laboratory size range 100-400 mm is developed and the different fracture parameters from size effect model, effective crack model, double-K fracture model and double-G fracture model are evaluated using the input data obtained from FCM. In addition, the fracture parameters of two parameter fracture model are obtained using the mathematical coefficients available in literature. From the study it is concluded that the fracture parameters obtained from various nonlinear fracture models including the double-K and double-G fracture models are influenced by the specimen size. These fracture parameters maintain some definite interrelationship depending upon the specimen size and relative size of initial notch length.
 
Key Words
    concrete fracture; fracture process zone; cohesive stress distribution; nonlinear fracture models; size-effect; three-point bending test.
 
Address
Shailendra Kumar: Department of Civil Engineering, National Institute of Technology, Jamshedpur-831 014, India; Department of Civil Engineering, Indian Institute of Technology, Kharagpur-721 302, India
S.V. Barai: Department of Civil Engineering, Indian Institute of Technology, Kharagpur-721 302, India
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2018 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: technop@chol.com