FE Models of Cold-Formed Steel Panels with Burring Holes for the Seismic Retrofit of Existing Buildings

Sustainability has become an indispensable feature of future development in all sectors, including construction, both in new buildings and in the renovation of existing structures. To be effective, sustainability must not only consider environmental aspects, but must also include structural safety in addition to resilience. In recent years, integrated and holistic approaches based on the principles of sustainability and life cycle thinking have been proposed, aiming to define retrofit strategies to reduce the impact along the life cycle of buildings. To address the need for effective renovation of existing buildings, structural retrofit solutions for RC buildings have been studied and developed in recent years. In this paper, the behavior of CFS panels with burring holes when used as a strengthening solution is further investigated. Finite element models of the panel are developed to capture its experimental behavior. Subsequently, the FE model and the effectiveness of the retrofit system in the application of CFS panels are verified on a case study building.