Numerical simulation on time-dependent mechanical behavior of concrete under coupled axial loading and sulfate attack
| Autor: | Xiao-Bao Zuo, Guang-Ji Yin, Olawale Ayinde, Wang Jialin, Yu-Juan Tang |
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| Rok vydání: | 2017 |
| Předmět: |
Ettringite
Environmental Engineering Gypsum Materials science Computer simulation business.industry Constitutive equation 0211 other engineering and technologies 020101 civil engineering Ocean Engineering 02 engineering and technology Structural engineering engineering.material 0201 civil engineering Stress (mechanics) chemistry.chemical_compound chemistry Damage mechanics 021105 building & construction engineering Bearing capacity Sulfate Composite material business |
| Zdroj: | Ocean Engineering. 142:115-124 |
| ISSN: | 0029-8018 |
| DOI: | 10.1016/j.oceaneng.2017.07.016 |
| Popis: | This paper numerically simulates time-dependent mechanical behaviors, such as stress redistribution and bearing capacity degradation, of concrete subjected to the coupled axial loading and sulfate attack. Based on Fick's law and chemical reaction kinetics, a diffusion-reaction model was proposed to obtain the spatial and time-dependent concentration distribution of sulfate ion, gypsum and ettringite. From previous study, a chemical damage, characterized by the volumetric expansion from ettringite formation, is introduced to reflect the influence of sulfate attack on concrete performance. Furthermore, using the plasticity theory and damage mechanics, a coupled chemo-mechanical damage constitutive model was determined by introducing the chemical damage. Finally, a concrete prism is regarded as a research object, to investigate the time-dependent stress and bearing capacity degradation of concrete structures subjected to the coupled axial compression and sulfate attack. |
| Databáze: | OpenAIRE |
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