Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Computers and Concrete Volume 21, Number 2, February 2018 , pages 209-217 DOI: https://doi.org/10.12989/cac.2018.21.2.209 |
|
|
|
Compressive behavior of concrete under high strain rates after freeze-thaw cycles |
||
Xudong Chen, Chen Chen, Zhiheng Liu, Jun Lu and Xiangqian Fan
|
||
| Abstract | ||
| 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. | ||
| Key Words | ||
| concrete; dynamic compressive behavior; freeze-thaw; fractal theory; strain rate | ||
| Address | ||
| Xudong Chen and Chen Chen and Zhiheng Liu: College of Civil and Transportation Engineering, Hohai University, Nanjing, 210098, China Jun Lu and Xiangqian Fan: Department of Materials and Structural Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210024, China | ||