Determination of size-independent specific fracture energy of normal- and high-strength self-compacting concrete from wedge splitting tests

被引：50

作者：

Cifuentes, Hector ^{[1
]}

Karihaloo, Bhushan L. ^{[2
]}

机构：

[1] Univ Seville, Escuela Tecn Super Ingn, Grp Estruct, E-41092 Seville, Spain

[2] Cardiff Univ, Sch Engn, Cardiff CF24 3AA, S Glam, Wales

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2013年 / 48卷

关键词：

Concrete; Boundary effect; Size-independent fracture energy; Transition length; Test conditions; 3-POINT BEND TESTS; PROCESS ZONE; BOUNDARY;

D O I：

10.1016/j.conbuildmat.2013.07.062

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Wedge splitting tests have been conducted on two different self-compacting concretes (normal- and high-strength) and the size-dependent fracture energy G(f) determined from the measured RILEM work of fracture. Then the specific size-independent fracture energy, G(F), has been determined using the boundary effect (BE) method of Hu and Wittmann and the simplified boundary effect (SBE) method proposed by Abdalla and Karihaloo. Tests on specimens of three different sizes and four different relative notch depths have shown that a unique value of G(F) can be obtained irrespective of the specimen size and relative notch depth. The results by both the BE and SBE methods are in very good agreement. A comparison with previous results from Abdalla and Karihaloo for normal- and high-strength vibrated concretes tested under the same conditions in the same laboratory shows that the SCC has a lower specific size-independent fracture energy than the vibrated concrete of the same strength. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：548 / 553

页数：6

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