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The article discusses the analyses of a numerical model of an extradosed bridge built as part of the project called “Construction of S7 expressway connecting Miłomłyn and Olsztynek, together with construction of Ostróda Bypass as a section of national road no. 16.” The constructed facility fits in with the global trends of construction of next generation concrete bridges with tensioned tendons. The bridge is the best in its class in Europe in terms of the length of its main span. It is also one of the first concrete bridges in Poland which have been built using cantilever technology in which the extradosed tendons were stressed during construction process. The article contains, in particular, the selected results of the analyses related to changes of forces and normal stresses in extradosed tendons depending on live loads to which the bridge was exposed during the service phases, while accounting for environmental and rheological as well as passage of time.

Analysis of Changes of Forces and Normal Stress in Extradosed Tendons of the MS-3B Bridge Located on the Ring Road in Ostróda