Väster pedestrian and cycle bridge

Abstract

ABSTRACTThis pedestrian and cycle bridge spans the river in Eskilsuna connecting the historic industrial area of Munktellstaden with the town centre, forming part of a rehabilitation of the area. The bridge was completed in 2016 on behalf of the Eskilstuna municipality. The final design was chosen from three alternatives presented by the design team to the municipality; the Landmark, the Industrial and the Transparent. All three options proposed were of steel, and all designs had to provide a 4.5m free deck width, maintain an unobstructed navigation channel of 5m wide by 3.35m high and a maximum slope of 5%. The Landmark proposal was an asymmetric cable stayed bridge with a 27m high, A‐shaped, inclined steel pylon located on one bank with two planes of cables towards the steel deck and one plane of cables towards the back anchorage. The Industrial proposal was a variable height optimized truss. The two lateral trusses, also forming the guardrail, were inclined outwards to provide a sensation of openness to the bridge user. The design finally chosen by the client was the Transparent. This bridge, unlike the other two, has two supports within the river that allows for a very slender deck. There is a central, low arch spanning 32m and an overall length of 65m. The arches are formed from two inclined box sections which are slightly curved on plan towards the supports. The railing is made up of a series of thin, steel plates connected via a stainless‐steel handrail. The overall effect of transparency thus allows for a largely unobstructed view along the river. Due to the slender deck section a detailed dynamic analysis was carried out to check for possible pedestrian‐induced vibrations.