3rd Croatian Conference on Earthquake Engineering 3CroCEE

The structural behavior of reinforced concrete (RC) structures with and without infill is investigated in this work under axial and horizontal loading scenarios. Using sophisticated software and micro modelling approaches, the structural performance of RC frames of various lengths both bare and infilled is assessed, with a focus on rigidity, ductility, and load-bearing capacity. The RC frames was designed according to Eurocode (EC) standards to ensure compliance with current design regulations, providing a reliable basis for analysis. The analysis thoroughly examines the structural behavior of these frames and how they react to combined loading situations. The findings imply that the length of the frame and the presence of infill have a major impact on the structures' lateral stiffness and load-bearing capability. Infill-filled frames are more resistant to horizontal forces, which results in less displacement. On the other hand, bare frames with no infill show less stiffness and load-bearing ability. This highlights how important frame length and infill integration are to enhancing the overall structural performance of RC frames. The investigation further emphasizes how important these elements are to improving the seismic resistance of RC frames. Across all frame lengths, infilled frames provide better stability and resistance to lateral stresses than only concrete frames. In order to ensure better performance, structural stability, and safety under both axial and lateral loading circumstances, this research advances optimum design methodologies for RC frames in seismic regions. The findings give engineers and designers important new information by showing how the thoughtful application of infill and frame length variations can significantly improve the structural behavior of RC frames. These findings offer useful advice for enhancing stability and resilience in real-world engineering applications, and they can be applied to both new construction and retrofit projects.