Nutzungsdauer von Tragwerken unter Berücksichtigung der CC-Versagensfolgeklassen

Service life of structures considering consequence classes (CC) of failure: Tunnel constructions

The growing importance of the sustainable use of engineering structures necessitates innovative approaches to extend the service life and enhance the resilience of concrete structures. Aging, operational demands, environmental and climatic impacts present significant challenges, requiring a thorough analysis of quality and safety criteria to ensure the long-term functionality of these structures. The aim of this paper is to explore the application of identity and conformity methods for quality assurance in construction and evaluate their influence on the service life of concrete structures in critical infrastructure. Particular emphasis is placed on identifying safety margins and their potential contribution to extending service life. The paper includes an analysis of relevant design codes and the variability of material properties, with a focus on the coefficient of variation (COV) of concrete. In addition, the application of reliability-based safety concepts using partial safety factors is examined. These studies are intended to encourage a re-evaluation of current quality control practices, as well as the application of conformity assessments and acceptance testing for concrete structures.