Predicting unstable toughness of concrete based on initial toughness criterion

12Citations
Citations of this article
7Readers
Mendeley users who have this article in their library.

Abstract

The fracture processes of concrete were described by a cohesive crack model based on initial toughness criterion. The corresponding analytical method to predict the instability state was proposed. In this model, the initial toughness was adopted as the crack propagation criterion and the weight function method was used to calculate the stress intensity factor and the crack opening displacement caused by the cohesive stress. The unstable toughness can be easily obtained using the proposed method without measuring parameters at the critical state that was necessary in traditional methods. The proposed method was verified by existing experimental data of wedge splitting specimens with different grades of concrete and the sensitivity of the results on the tensile softening curve was discussed. The results demonstrate that the proposed method can well predict the peak load, the critical effective crack length, and the unstable toughness of concrete specimens. Moreover, the calculated unstable toughness is not sensitive to the tensile softening curve. © 2014 Zhejiang University and Springer-Verlag Berlin Heidelberg.

Cite

CITATION STYLE

APA

Qing, L. B., Tian, W. L., & Wang, J. (2014). Predicting unstable toughness of concrete based on initial toughness criterion. Journal of Zhejiang University: Science A, 15(2), 138–148. https://doi.org/10.1631/jzus.A1300261

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free