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2007年 第1卷 第1期

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《结构与土木工程前沿（英文）》 >> 2007年 第1卷 第1期 doi: 10.1007/s11709-007-0009-z

Biaxial tensile-compressive experiment of concrete at high temperatures

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;

发布日期： 2007-03-05
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摘要

Biaxial tension-compression experiments of concrete of five stress ratios at high temperatures were carried out using the large static-dynamic triaxial test system in the State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology. The stress ratios s1/s3 are 0, 0.1, 0.25, 0.50, and 0.75. The temperatures are 20vH, 200vH, 300vH, 500vH, 600vH. The mechanical behavior of concrete under biaxial tension-compression at high temperatures is analyzed. It is found that both the tensile strength and strain diminished with the increase in temperature under each stress ratio. Based on the test results, the relationship between tensile strengths and stress ratios and temperature is proposed. In addition, the failure criterion of concrete under biaxial stress state of tension-compression at high temperatures is established.

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