Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Computers and Concrete Volume 19, Number 2, February 2017 , pages 143-152 DOI: https://doi.org/10.12989/cac.2017.19.2.143 |
|
|
|
Modeling of time-varying stress in concrete under axial loading and sulfate attack |
||
Guangji Yin, Xiaobao Zuo, Yujuan Tang, Olawale Ayinde and Dongnan Ding
|
||
| Abstract | ||
| This paper has numerically investigated the changes of loading-induced stress in concrete with the corrosion time in the sulfate-containing environment. Firstly, based on Fick\'s law and reaction kinetics, a diffusion-reaction equation of sulfate ion in concrete is proposed, and it is numerically solved to obtain the spatial and temporal distribution of sulfate ion concentration in concrete by the finite difference method. Secondly, by fitting the existed experimental data of concrete in sodium sulfate solutions, the chemical damage of concrete associated with sulfate ion concentration and corrosion time is quantitatively presented. Thirdly, depending on the plastic-damage mechanics, while considering the influence of sulfate attack on concrete properties, a simplified chemo-mechanical damage model, with stress-based plasticity and strain-driven damage, for concrete under axial loading and sulfate attack is determined by introducing the chemical damage degree. Finally, an axially compressed concrete prism immersed into the sodium sulfate solution is regarded as an object to investigate the time-varying stress in concrete subjected to the couplings of axial loading and sulfate attack. | ||
| Key Words | ||
| time-varying stress; concrete; chemo-mechanical damage model; sulfate attack; axial loading | ||
| Address | ||
| Guangji Yin, Xiaobao Zuo, Yujuan Tang, Olawale Ayinde and Dongnan Ding: Department of Civil Engineering, Nanjing University of Science & Technology, Nanjing 210094, China | ||