An Experimental Method to Determine the Tensile Strength of Concrete at High Rates of Strain

被引：152

作者：

Erzar, B. ^{[1
]}

Forquin, P. ^{[1
]}

机构：

[1] Univ Paul Verlaine Metz, Lab Phys & Mecan Mat, F-57045 Metz 1, France

来源：

EXPERIMENTAL MECHANICS | 2010年 / 50卷 / 07期

关键词：

Mortar and concrete; Dynamic fragmentation; Spall strength; Hopkinson bar; Strain-rate sensitivity; FRACTURE ENERGY; FRAGMENTATION; BEHAVIOR;

D O I：

10.1007/s11340-009-9284-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present work, dynamic tensile strength of concrete is experimentally investigated by means of spalling tests. Based on extensive numerical simulations, the paper presents several advances to improve the processing of spalling tests. The striker is designed to get a more uniform tensile stress field in the specimen. Three methods proposed in the literature to deduce the dynamic strength of the specimen are discussed as well as the use of strain gauges and a laser extensometer. The experimental method is applied to process data of several tests performed on wet micro-concrete at strain rates varying from 30 to 150/s. A significant increase of the dynamic tensile strength with strain-rate is observed and compared with data of the literature. In addition, post-mortem studies of specimens are carried to improve the analysis of damage during spalling tests.

引用

页码：941 / 955

页数：15

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