A visco-elasto-plastic fiber bundle-chain model for creep of concrete under constant loading is developed in this work. By introducing a Kelvin-Voigt element and a dashpot chain into the fiber bundle-plastic chain model, the proposed model effectively captures both the time-dependent creep and the instantaneous plastic damage of concrete. The Kelvin-Voigt element simulates the recoverable elastic creep, while the dashpot chain characterizes the irreversible plastic creep. Furthermore, by considering the randomness of micro mechanical properties of springs and dashpots, the model conveniently characterizes the mean and stochastic creep behaviors from a microstructural perspective, avoiding the complexity of multi-factor randomness in traditional approaches. It is found that the model predictions agree well with experimental results, demonstrating its reliability. Additionally, a comparative discussion with existing models in the literature confirms the advantages of the proposed approach in simulating both deterministic and stochastic creep behavior.
Zhi Shan, Zhiwu Yu — 1) School of Civil Engineering, Central South University, Changsha, China; 2) National Engineering Research Center of High-speed Railway Construction Technology, Changsha, China; 3) Engineering Technology Research Center for Prefabricated Construction Industrialization of Hunan Province, Changsha, China
Chao Huang, Hongxi Fan — School of Civil Engineering, Central South University, Changsha, China
Zhihui Zheng — School of Civil Engineering and Architecture, NingboTech University, Ningbo, China
PDF Viewer
Preview is limited to the first 3 pages. Sign in to access the full PDF.
