The New Årsta Railway Bridge in Stockholm, Sweden, which is under construction at this very moment, will be opened for traffic in 2006. The bridge is part of the overall upgrading to four tracks, compared to today’s two tracks on the old bridge, between Stockholm South and a new station called Årstaberg. The purpose of the extension is to increase track capacity. The structure is a very slender and complex prestressed concrete bridge without any ballast. Therefore, the Swedish National Railway Administration (Banverket) has initiated a measuring program to follow up and evaluate/verify stresses and deformations during construction and operation. Static and dynamic measurements/analyses are being conducted.

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