FRACTURE ENERGY AND TENSION PROPERTIES OF HIGH-STRENGTH CONCRETE

被引：75

作者：

MARZOUK, H ^{[1
]}

CHEN, ZW ^{[1
]}

机构：

[1] SHAWMONT NEWFOUNDLAND LTD,ST JOHNS,NF,CANADA

来源：

JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 1995年 / 7卷 / 02期

关键词：

D O I：

10.1061/(ASCE)0899-1561(1995)7:2(108)

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A test setup and adequate instrumentation were developed to record the tension properties of high-strength concrete, including the postpeak softening response. The direct uniaxial tension tests were performed under a strain-controlled mode through a close-loop testing machine. The splitting tensile strength and modulus of rupture were also recorded conforming to standard ASTM test procedures. Test results revealed that high-strength concrete exhibits a more brittle and stiffer behavior with a large initial modulus of elasticity and a more sharply descending branch of the stress-deformation curve beyond the peak load. The unique softening behavior and the more brittle nature of high-strength concrete were expressed in terms of a stress-displacement (crack width) diagram and fracture energy. The fracture energy of high-strength concrete is estimated to be about five times the area under the ascending portion of the stress-deformation curve, compared to a corresponding value of 10 estimated for normal-strength concrete. Based on the test results, a constitutive relationship is recommended for the behavior of high-strength concrete in tension, including postpeak softening response.

引用

页码：108 / 116

页数：9

共 18 条

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