Effect of specimen size on fracture energy and softening curve of concrete: Part II. Inverse analysis and softening curve

被引：83

作者：

Kwon, Seung Hee ^{[2
]}

Zhao, Zhifang ^{[3
]}

Shah, Surendra P. ^{[1
]}

机构：

[1] Northwestern Univ, Evanston, IL 60208 USA

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

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

来源：

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

关键词：

softening curve; inverse analysis; size effect; fracture process zone;

D O I：

10.1016/j.cemconres.2008.03.014

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The size effect of fracture energy was observed in experiments presented in the preceding paper. in this paper, the softening curve representing the relationship between the crack opening and the gradual stress drop after tensile strength was found for each specimen of the experiments by an inverse analysis. The effect of the size-dependent fracture energy on the softening curve was then investigated. It was found that the first steep branch of the softening curve is very similar for different size specimens whereas the tail of the curve becomes longer with increased specimen size. The observed size-dependent fracture energy can be explained by the features identified on the softening curve, and a possible mechanism of the fracture process zone with respect to the size effect is discussed herein. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1061 / 1069

页数：9

共 16 条

[1]

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[2]

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[3]

BAZANT ZP, 1988, ASME, V55, P287

[4]

BROWN KM, 1970, 320 IBM PHIL SCI CTR