Assessment of existing PC structures according to EN 1992-1-1:2023

The paper aims to present a number of additional standard provisions and changes included in EN 1992-1-1:2023, published in November 2023. Among other features, the new version of Eurocode 2 includes informative annexes on the assessment of existing structures and safety formats for non-linear analysis, which previously were not standardised. In addition, the paper summarises the basic changes of the new standard for the analysis of prestressed concrete structures. The paper also presents an example of the assessment of an existing post-tensioned concrete member in compliance with the recommendations of the EN 1992-1-1:2023 standard. The analyses were performed in two levels of accuracy, i.e. I – analytical method, II – nonlinear FEM analysis. Comparison of the obtained results indicates the potential of nonlinear analysis for optimal assessment of existing structures in accordance with Eurocode 2, especially for non-standard structures, such as prestressed structures.