Ein Ansatz zur Bewertung des Verstarkungsbedarfs von Massivbrucken: Auswertung von Bauwerks- und Schadensdaten mit Methoden der Risikobewertung

An approach to evaluate the strengthening requirement of concrete bridges - Evaluation of structural and damage data using methods of the risk assessment Due to the condition of the bridges and the constantly increasing traffic load, there is an enormous need for bridge strengthening relevant to bearing capacity in addition to the replacement construction. Therefore, the available financial resources for the maintenance of the bridge stock and for the maintenance of a functioning infrastructure must be used efficiently and effectively within the maintenance management. The presented approach to determine the basic strengthening requirement of concrete bridges provides a further feature for the decision-making which bridge categories require a strengthening and which bridges can be considered as rather uncritical with regard to a strengthening. The determination is made on the basis of risk assessment methods and on the basis of real damage data on superstructures of about 1,240 concrete bridges in the course of federal trunk roads. The risk assessment was carried out on the one hand by using level-frequency diagrams, considering the risk matrices, and on the other hand by using risk numbers, each separately for the assessment attribute of stability and durability.