Effect of specimen size on fracture energy and softening curve of concrete: Part I. Experiments and fracture energy

被引：146

作者：

Zhao, Zhifang ^{[2
]}

Kwon, Seung Hee ^{[1
]}

Shah, Surendra P. ^{[3
]}

机构：

[1] Myongji Univ, Dept Civil & Environm Engn, Yongin 449728, Gyeonggi Do, South Korea

[2] Zhejiang Univ Technol, Coll Civil Engn & Architecture, Hangzhou 310014, Zhejiang, Peoples R China

[3] Northwestern Univ, Ctr Adv Cement Based Mat, Evanston, IL 60208 USA

来源：

CEMENT AND CONCRETE RESEARCH | 2008年 / 38卷 / 8-9期

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

fracture energy; three-point bend test; wedge splitting test; size effect;

D O I：

10.1016/j.cemconres.2008.03.017

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The fracture energy of concrete G(F) is a fundamental fracture parameter, presenting the concrete's cracking resistance. However, because of the experimentally observed size dependency, it remains controversial as to whether the fracture energy can be considered as a material property. In this study, a three-point bend test for a notched beam and a wedge splitting test were performed with different size specimens for ten different concrete mixes in order to investigate the effect of specimen size and geometry on the fracture energy. A data processing method was proposed for averaging the test results of companion specimens, and the fracture energy was calculated from the averaged results. From a comparison of the fracture energies, it was found that the fracture energy increases with an increase in specimen size in both the beam and wedge splitting tests. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1049 / 1060

页数：12

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