Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4913811 | Construction and Building Materials | 2017 | 8 Pages |
Abstract
A comparative study on the dynamic properties of dam and sieved concrete was conducted based on dynamic biaxial tensile-compressive tests. Specimens were designed to be prismatic shape with a size of 250Â ÃÂ 250Â ÃÂ 400Â mm for dam concrete and 150Â ÃÂ 150Â ÃÂ 300Â mm for sieved concrete, respectively. Each specimen was biaxially loaded by constant tensile-compressive (T-C) stress ratios (0:â1, 0.05:â1, 0.1:â1, 0.25:â1, 0.5:â1, and â) at the strain rate of 10â5Â sâ1, 10â4Â sâ1, 10â3Â sâ1, and 10â2Â sâ1 by a servo-hydraulic multi-axial testing machine. The failure modes of specimens have been compared under various biaxial T-C loading conditions at each strain rate, thus the fracture surface of sieved concrete specimen is smoother than dam concrete. The dynamic strength of dam concrete is lower than sieved concrete under the same loading condition, and the ratio of them is insensitive to strain rate. The growth rates of dynamic strength for dam concrete is consistent with sieved concrete, whereas much larger than ordinary concrete. By regression of the test results, the dynamic T-C failure criterions for dam and sieved concrete were proposed after considering the combined effects of strain rate and stress ratio.
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Authors
Lu Shen, Licheng Wang, Yupu Song, Linlin Shi,