Employing finite element analysis, the structural behavior of high-performance concrete is simulated and investigated. A study has been made by employing agricultural waste cellulose nanofiber as a sustainable replacement of cement in high performance concrete. It investigates the behavior of cellulose nano-fibrotic high-performance concrete beam – column joint through a comprehensive analysis utilizing the ANSYS software. High-performance concrete is a material recognized for its superior mechanical properties, durability and potential for innovative construction applications. This research investigates the structural behavior of high-performance concrete incorporating cellulose nanofibers using finite element analysis via ANSYS software. The investigation begins with an exploration of the material composition and mix design of the high-performance concrete. The ANSYS analysis is then employed to simulate the structural behavior of the high-performance concrete. The ANSYS computer program is used to implement the finite element approach. The element is utilized to model the embedded cellulose nano fibres in high-performance concrete beam-column joints. In order to confirm the precision and dependability of the numerical models, the study goes so far as to perform a comparison among the outcomes of the experimental data and ANSYS simulation. For the creation of an effective and safe building, it is essential to comprehend how these structural elements respond to loading. This study uses ANSYS analysis to examine high-performance concrete containing cellulose nanofibers beam-column joint. The findings of the beam-column joint in terms of equivalent stress, strain and deformation for structural steel and concrete are obtained. Comparing the experimental data from other researchers with the finite element solution yields results that are in good agreement. The results demonstrate that cellulose nanofibers-enhanced high-performance concrete shows superior mechanical properties, including improved equivalent stress, strain and deformation under load, compared to traditional high-performance concrete. These results highlight the potential of using agricultural waste cellulose nanofibers to enhance concrete performance, contributing to more sustainable and durable construction practices.