Multiscale analysis and application of modified PVA fiber reinforced rubber concrete in frame structures

The paper presents a multiscale analysis of PVA fiber-reinforced rubber concrete modified with KH-560. Through a combined approach of experiments and numerical simulations, the feasibility of applying PVA fiber-reinforced rubber concrete in frame structures is validated. Firstly, utilizing molecular dynamics simulations with MS software, the modification effect of KH-560 on PVA fiber material is explored at the molecular level, confirming its ability to effectively enhance the bonding strength between PVA fibers and rubber concrete. Subsequently, a portal frame structure experiment is conducted, validating the actual strength and stiffness of the material through mechanical performance measurements. Lastly, employing Abaqus finite element software, a numerical simulation of the material's application in concrete frame structures is conducted, analyzing its mechanical response and performance in real engineering environments. The research findings indicate that by fully exploiting the deformation characteristics of PVA fiber-reinforced rubber concrete after modification, the use of this material in structural frameworks can maintain or even slightly increase the load-bearing capacity. This study pioneers new prospects for the application of PVA fiber-reinforced rubber concrete in concrete frame structures, providing a more reliable and secure option for structural engineering practice. It offers concrete and innovative solutions for the sustainable development of actual engineering projects.