Abstract
This study developed a mesoscale mechanical model capable of reproducing the volumetric deformation behaviour of cementitious materials in deep-sea environments. In the analysis, the rigid-body spring model (RBSM), a mesoscale mechanical model, was integrated with a truss network model (TNM) capable of evaluating mass transport, forming the RBSM-TNM framework. To assess the volumetric change of the skeleton under hydrostatic pressure, a creep model was applied to the mechanical springs representing the mechanical response of the skeleton. Additionally, the truss network model was employed to evaluate water penetration from the surface. Furthermore, based on the concept of poromechanics, the model was designed to generate mechanical springs representing the stress contribution of pore water, depending on the water penetration amount. By assuming that the volumetric strain of the skeleton induced by hydrostatic pressure is equivalent to the volumetric change of the pore, the pressure exerted by the pore water on the skeleton was calculated based on the strain and elastic modulus of the skeleton. Consequently, the proposed model demonstrated its capability to reproduce, to some extent, the characteristic volumetric deformation behaviour of cementitious materials in deep-sea environments.
Keywords
deep-sea, water penetration, hydrostatic pressure, volumetric change, mesoscale discrete model.
DOI
10.5703/1288284318116
Recommended Citation
Miura, Taito; Hatta, Ryosuke; Amatsubo, Ryuta; Kawabata, Yuchiro; and Takahashi, Keisuke, "Development of Mesoscale Model for Volumetric Deformation of Cementitious Materials in Deep-Sea Environment" (2025). International Conference on Durability of Concrete Structures. 3.
https://docs.lib.purdue.edu/icdcs/2025/cms/3
Development of Mesoscale Model for Volumetric Deformation of Cementitious Materials in Deep-Sea Environment
This study developed a mesoscale mechanical model capable of reproducing the volumetric deformation behaviour of cementitious materials in deep-sea environments. In the analysis, the rigid-body spring model (RBSM), a mesoscale mechanical model, was integrated with a truss network model (TNM) capable of evaluating mass transport, forming the RBSM-TNM framework. To assess the volumetric change of the skeleton under hydrostatic pressure, a creep model was applied to the mechanical springs representing the mechanical response of the skeleton. Additionally, the truss network model was employed to evaluate water penetration from the surface. Furthermore, based on the concept of poromechanics, the model was designed to generate mechanical springs representing the stress contribution of pore water, depending on the water penetration amount. By assuming that the volumetric strain of the skeleton induced by hydrostatic pressure is equivalent to the volumetric change of the pore, the pressure exerted by the pore water on the skeleton was calculated based on the strain and elastic modulus of the skeleton. Consequently, the proposed model demonstrated its capability to reproduce, to some extent, the characteristic volumetric deformation behaviour of cementitious materials in deep-sea environments.
