Fracture of model concrete:: 2.: Fracture energy and characteristic length

被引：81

作者：

Rossello, C. ^{[1
]}

Elices, M. ^{[1
]}

Guinea, G. V. ^{[1
]}

机构：

[1] Univ Politecn Madrid, ETSI Caminos, Dept Ciencia Mat, E-28040 Madrid, Spain

来源：

CEMENT AND CONCRETE RESEARCH | 2006年 / 36卷 / 07期

关键词：

concrete; fracture; fracture energy; toughness; debonding;

D O I：

10.1016/j.cemconres.2005.04.016

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The specific fracture energy G(F) was measured in six types of simple concrete: all from the same matrix. The aggregates were spheres of the same diameter (strong aggregates, that debonded during concrete fracture, and weak aggregates, able to break); three kinds of matrix-aggregate interface (weak, intermediate and strong) were used. All in all, 55 test results are reported. These results are intended to be used as an experimental benchmark for checking numerical models of concrete fracture. A meso-level analysis of these results showed a correlation between the measured G(F) values and the properties of the matrix, aggregates and interfaces, particularly with the actual area of the fracture surface. The strength of the matrix-aggregate interface correlates quite well with G(F), and concrete ductility, measured by means of the characteristic length, correlates also with the strength of the matrix-aggregate interface. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1345 / 1353

页数：9

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