A general framework for determining fracture parameters of concrete based on fracture extreme theory

被引：14
作者：
Li, Yang [1 ]
Qing, Longbang [1 ]
Cheng, Yuehua [1 ]
Dong, Mowen [1 ]
Ma, Guowei [1 ]
机构：
[1] Hebei Univ Technol, Coll Civil Engn & Transportat, Tianjin 300401, Peoples R China
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2019年 / 103卷
基金：
中国国家自然科学基金;
关键词：
Concrete; Fracture extreme theory; Initial fracture toughness; Tensile strength; Three-point bending beam; CRACK EXTENSION RESISTANCE; TENSILE-STRENGTH; COHESIVE CRACK; TOUGHNESS; PROPAGATION; BEHAVIOR; ROCK; MODEL; CRITERION; MIXTURES;
D O I：
10.1016/j.tafmec.2019.102259
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A general theoretical framework for determining the fracture parameters of concrete was presented based on fracture extreme theory (FET). The method for determining tensile strength f(t) and initial fracture toughness K-I(ini) was established using nil-stress intensity factor (nil-SIF) criterion and initial fracture toughness criterion, respectively. Using the nil-SIF criterion, the f(t) was determined by the proposed method and verified by experimental values. In addition, the values of K-I(ini) calculated using the initial fracture toughness criterion were compared with those using an existing analytical method. The influence of the cohesive stress distribution on K(I)(ini )was analyzed. With FET, only the experimental peak load of one specimen was needed, and the measurement of the critical crack mouth opening displacement was not required for the calculation.
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页数：16
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