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자료유형
학술저널
저자정보
Xudong Chen (College of Civil and Transportation Engineering Hohai University Nanjing 210098 China) Chen Chen (College of Civil and Transportation Engineering Hohai University Nanjing 210098 China) Zhiheng Liu (College of Civil and Transportation Engineering Hohai University Nanjing 210098 China) Jun Lu (Department of Materials and Structural Engineering Nanjing Hydraulic Research Institute Nanjing 2) Xiangqian Fan (Department of Materials and Structural Engineering Nanjing Hydraulic Research Institute Nanjing 2)
저널정보
한국계산역학회 Computers and Concrete, An International Journal Computers and Concrete, An International Journal Vol.21 No.2
발행연도
2018.1
수록면
209 - 217 (9page)

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The dynamic compressive behavior of concrete after freezing and thawing tests are investigated by using the split Hopkinson pressure bar (SHPB) technique. The stress-strain curves of concrete under dynamic loading are measured and analyzed. The setting numbers of freeze-thaw cycles are 0, 25, 50, and 75 cycles. Test results show that the dynamic strength decreases and peak strain increases with the increasing of freeze-thaw cycles. Based on theWeibull distribution model, statistical damage constitutive model for dynamic stress-strain response of concrete after freeze-thaw cycles was proposed. At last, the fragmentation test of concrete subjected to dynamic loading and freeze-thaw cycles is carried out using sieving statistics. The distributions of the fragment sizes are analyzed based on fractal theory. The fractal dimensions of concrete increase with the increasing of both freeze-thaw cycle and strain rate. The relations among the fractal dimension, strain rates and freeze-thawing cycles are developed.

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