Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Experimental Study on the Fracture Parameters of Concrete

Version 1 : Received: 27 November 2020 / Approved: 30 November 2020 / Online: 30 November 2020 (10:58:49 CET)

A peer-reviewed article of this Preprint also exists.

Wang, Z.; Gou, J.; Gao, D. Experimental Study on the Fracture Parameters of Concrete. Materials 2021, 14, 129. Wang, Z.; Gou, J.; Gao, D. Experimental Study on the Fracture Parameters of Concrete. Materials 2021, 14, 129.

Journal reference: Materials 2020, 14, 129
DOI: 10.3390/ma14010129

Abstract

Abstract: This study was aimed to determine the influence of the volume fraction of steel fibers and on fracture parameters of concrete. Fifty notched steel fiber reinforced concrete (SFRC) beams and ordinary concrete beams with dimensions of 100mm×100mm×515mm were cast and tested via three-point bending test. Among them, the type of steel fiber is milling type (MF), and the volume fraction of steel fiber added is 0%, 0.5%, 0.5%, 1.5%, 1.5%, 2%, respectively. The effects of the steel fiber volume fraction (VF) on the critical stress intensity factor (KIC), fracture energy (GF), the deflection at failure(δ0), the critical crack mouth opening displacement (CMODC) and the critical crack tip opening displacement (CTODC)were studied. Through the analysis of test phenomena and test data such as load-deflection (P-δ) curve, load-crack mouth opening displacement (P-CMOD) curve and load-crack tip opening displacement (P-CTOD) curve following conclusions are drawn: With the increase of steel fiber volume fraction, some fracture parameters increase gradually and maintain a certain linear growth. The gain ratio of fracture parameters increases significantly, and the gain effect is obvious. Through this law of growth, the experimental statistical formulas of fracture energy and critical stress intensity factor are summarized.

Subject Areas

steel fiber; three-point bending; fracture parameters; gain ratio

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