Rhine Bridge Cologne-Mülheim: balance between engineering heritage and replacement strategies for existing highway bridges

Abstract

Around 40% of the 40000 bridges of the German federal highway network were built between 1960 and
1970, and were designed for the traffic loads required in the codes of the time, which did not require a
fatigue check. The landmark Bridges over the river Rhine have suffered specially the increase of loads
and traffic volume since the 80s. We are facing the challenge of stablishing systematic procedures for the
inspection, assessment, and strengthening or replacement of existing structures. The example of the
German system is presented, particularly the learnings gained with the assessment and refurbishment of
Cologne-Mülheim suspension Bridge.