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Initial cracking strength and initial fracture toughness from three‐point bending and wedge splitting concrete specimens
Author(s) -
Yao Xianhua,
Li Lielie,
Guan Junfeng,
Zhang Min,
Liu Zepeng,
Han Ruicong,
He Shuanghua
Publication year - 2021
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13381
Subject(s) - materials science , cracking , fracture toughness , wedge (geometry) , composite material , fracture (geology) , flexural strength , fracture mechanics , bending , three point flexural test , toughness , structural engineering , geometry , mathematics , engineering
In this study, a concept of initial cracking strength of concrete was elaborated. A fracture model and associated methods for determining independent initial cracking strength and initial fracture toughness by the three‐point bending (3‐p‐b) and wedge splitting (WS) concrete specimens are presented. The initial cracking strength and initial fracture toughness can be simultaneously determined using a curve fitting method from the proposed fracture model. All of the initial fracture curves were obtained by the determined concrete materials. The initial loads of the 3‐p‐b and WS specimens were predicted on the basis of the curves with ±15% ranges. Furthermore, the initial cracking strength and the initial fracture toughness of concretes were directly determined by analytical functions. The determined values within ±15% ranges cover most of the initial loads of the 3‐p‐b and WS specimens.