Reconstruction of the road bridge on Monte Cassino Avenue in Koszalin

This article presents the process of rebuilding the bridge on Monte Cassino Avenue in Koszalin, Poland. The deterioration of the pre-cast concrete beams resulted in a decrease in the load-bearing capacity. On this basis, the decision was made to demolish and build a new structure, taking into account existing foundations and strengthening them with additional pre-cast concrete piles. However, during demolition works, the northern structure of the bridge collapsed uncontrollably. After a reanalysis of the technology and taking into account additional safety requirements, the demolition works were renewed. Due to collapse and its possible negative impact on existing piles, design changes related to the location of the pier axes were introduced. The load tests conducted on the rebuilt bridge allowed the finite element (FE) model to be verified by determining and comparing the response of the structure to static and dynamic load. The verified model, as an element of a digital twin, can be used in facility management throughout the life cycle of the structure, minimising the risk of failures of strategic elements of critical infrastructure in the future.