A novel approach to estimate the evolution of fracture energy and tensile softening curve of concrete from very early age. (1st June 2018)

• Record Type: Journal Article
• Authors: Nguyen, Duy H.; Dao, Vinh T.N.
• Is Part Of: Engineering fracture mechanics. Volume 196(2018)
• Page Start: 43
• Page End: 55
• Publication Date: 2018-06-01
• Subjects: Early-age concrete -- Fracture energy -- Tensile softening curve -- Centroid coordinate -- Bi-linear approximation -- Power approximation; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2018.02.026
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: A novel approach for estimating of the evolution of fracture energy and tensile softening curve of concrete from early age is proposed. The proposed approach is based on three fundamental and logical criteria, each of which is thoroughly assessed on the basis of a rich collection of test data from different studies. The capability and reliability of the approach are demonstrated through practical examples. Abstract: Concrete fracture properties and their evolution over time are critical inputs for numerous engineering aspects. Despite substantial efforts invested, there exists a crucial need to establish a comprehensive model for reliable estimation of such evolution. In this paper, combining reliable experimental data and in-depth analysis, a novel approach for proper estimation of the evolution of fracture energy and tensile softening curve of concrete from early age is proposed. Fundamentally, the approach relies on three key criteria related to (i) tensile strength, (ii) tensile strength-fracture energy correlation and especially, (iii) centroid coordinates of the area under the stress-crack opening curve. The capability and reliability of the proposed approach are clearly demonstrated through a detailed assessment of these criteria and examples of practical applications.