Determination of tensile strength and fracture toughness of concrete using notched 3-p-b specimens

被引：108

作者：

Wang, Yusuo ^{[1
,2
]}

Hu, Xiaozhi ^{[1
]}

Liang, Li ^{[3
]}

Zhu, Wancheng ^{[4
]}

机构：

[1] Univ Western Australia, Sch Mech & Chem Engn, Perth, WA 6009, Australia

[2] Southwest Jiaotong Univ, Sch Civil Engn, Chengdu 610031, Peoples R China

[3] Northeastern Univ, Coll Resources & Civil Engn, Shenyang 110809, Peoples R China

[4] Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110809, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2016年 / 160卷

基金：

澳大利亚研究理事会; 中国国家自然科学基金;

关键词：

Three-point-bend (3-p-b) test; Tensile strength; Fracture toughness; Microcracking; Fracture process zone (FPZ); QUASI-BRITTLE FRACTURE; EFFECTIVE CRACK MODEL; DOUBLE-K CRITERION; PROCESS ZONE; ACOUSTIC-EMISSION; ENERGY; SIZE; BEAMS; LOAD; PROPAGATION;

D O I：

10.1016/j.engfracmech.2016.03.036

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Maximum loads of notched three-point-bend specimens with constant height are used to determine the tensile strength and fracture toughness of concrete. Normally the tensile strength and fracture toughness cannot be obtained from small three-point-bend specimens because of the highly heterogeneous composite structures of concrete and formation of fictitious crack prior to the maximum load. A simple fracture model is established, linking fictitious crack to the maximum aggregate size so that the concrete structure and fictitious crack formation can be considered together. Maximum loads of three-point-bend specimens with different initial notches containing different influence of the tensile strength and fracture toughness are then analyzied. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：67 / 77

页数：11

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