Nescio Bridge

Nescio Bridge
Nesciobrug

View of the bridge from underneath
Coordinates 52°21′20″N 4°58′16″E / 52.3555°N 4.9711°E / 52.3555; 4.9711Coordinates: 52°21′20″N 4°58′16″E / 52.3555°N 4.9711°E / 52.3555; 4.9711
Carries cyclists, pedestrians
Crosses Amsterdam–Rhine Canal
Locale Amsterdam IJburg neighbourhood
Other name(s) Palingbrug
(literally "Eel bridge")
Named for Dutch writer Nescio
Owner City of Amsterdam
ID number Amsterdam bridge № 2013
Characteristics
Material main span: steel
ramps: concrete
Total length 780 m (2,559 ft)
Longest span 163.5 m (536 ft)[1]
Clearance below 10 m (33 ft)
History
Architect Wilkinson Eyre Architects
Engineering design by ARUP; Grontmij
Constructed by VolkerWessels
Fabrication by Heerema Fabrication
Construction end 2006
Construction cost € 9.5 million[1]
or € 12.2 million[2]
Opened 7 June 2006 (2006-06-07) for cyclists
Nescio Bridge
Location in Amsterdam

The Nescio Bridge (or Nesciobrug in Dutch) is an award-winning cycle and footbridge in the Netherlands. This curved, steel suspension bridge, located in Amsterdam, is the country's first suspension bridge that carries only a cycle track and footway,[3] and at almost 800 metres length it is also one of the country's longest cycle and footbridges. Additionally, it is the longest single cable suspension bridge in the Netherlands.[1]

The bridge was designed by Jim Eyre of London-based Wilkinson Eyre Architects, in cooperation with two multinational engineering consultancy firms: London-based ARUP group and Netherlands-based Grontmij. The design stands out by using a single, self-anchored cable.

The bridge has won several awards, including the 2007 IstructE Pedestrian Bridges Award,[3] the 2007 Arthur G. Hayden Medal[nb 1] from the International Bridge Conference in Pittsburgh,[4][5] and the 2006 Dutch national award for building in steel (the Nationale Staalprijs).[4][6]

Location

The Nescio Bridge spans the Amsterdam–Rhine Canal, connecting the new residential area of IJburg, built on artificial islands in Lake IJ, with the mainland, landing very near Amsterdam Science Park, between East Amsterdam and North Diemen. On the IJburg side, the bridge touches down on the Diemerzeedijk, a 13th-century clay dike on which Dutch writer Nescio frequently made long walks that he recounted in his work, hence the occasion for the bridge's name.

Design and construction

The swooping cycle ramp at the northern (IJburg) side of the bridge.
Towards the shores, the cycle and pedestrian tracks split, and each veer off in their own directions.

Because the Amsterdam–Rhine Canal is one of the most heavily used inland waterways in Europe,[7][8][9] that connects the Port of Amsterdam, the fifth busiest port in Europe,[10] via the river Rhine to its hinterland, the bridge had to offer sufficient clearance to commercial shipping traffic for unrestricted passage. In order to achieve the needed 10 m (33 ft) clearance, while at the same time providing a conveniently shallow gradient for cyclists, the bridge has long approaches at both ends. On the north end, the long access ramp was fitted in by a long curve onto the Diemerzeedijk, whereas the southern end terminates in an expansive spiral cycle ramp.[11] The footbridge section connects to the shore with a spiral staircase at either end.[12]

The main span was constructed off-site as a single steel structure of approximately 180 m (591 ft) long, weighing some 510 t (502 long tons; 562 short tons).[9] In order to obstruct the busy shipping traffic on the canal as little as possible, it was hoisted into place within half a day on 9 July 2005. The cross-section of the bridge changes fluently from a deep triangular section at mid-span, where stiffness is needed, to a shallow section that merges into the concrete approaches. The angle of its sides makes it 'stealthy' to marine radar, again to ensure that it doesn't impede commercial shipping.[3] Additionally, tuned mass dampers have been fitted, to prevent the bridge from wobbling as people walk across.

Suspension bridges are comparatively rare in the Netherlands, because the generally soft Dutch soil makes it difficult to properly anchor the main cables at the ends. On the Nescio Bridge this was solved by anchoring the cables to the bridge itself.[13]

See also

Notes

  1. ↑ ‘For a single recent outstanding achievement in bridge engineering demonstrating innovation in special use bridges such as pedestrian, people-mover, or non-traditional structures.’

References

  1. 1 2 3 Nescio Bridge Amsterdam - A view from the cycle path (archived)
  2. ↑ A Critical Analysis of the Nescio Bridge, Amsterdam, published by the university of Bath
  3. 1 2 3 Nescio Bridge - ARUP consulting engineers (archived)
  4. 1 2 International award for Nescio Bridge - Grontmij
  5. ↑ Bridge Awards - Engineers' Society of Western Pennsylvania
  6. ↑ nl:Nationale Staalprijs
  7. ↑ "24th World Canals Conference shows richness of Dutch waterways" (PDF). World Canals Conference. 2011. p. 4. Retrieved 2015-08-30. .. the Amsterdam-Rhine Canal – the busiest canal in Europe ..
  8. ↑ Amsterdam-Rhine Canal - Britannica.com (archived)
  9. 1 2 "Amsterdam heeft grootste fiets- en voetgangersbrug" [Amsterdam has largest cycle and footbridge] (in Dutch). 2005-07-11. Archived from the original on 2015-08-29. Retrieved 2015-08-29.
  10. ↑ "Port Statistics 2013" (PDF) (Press release). Rotterdam Port Authority. 1 June 2014. p. 6. Retrieved 2014-06-28.
  11. ↑ Aerial photo of Nescio Bridge under construction (archived)
  12. ↑ Architect image (archived)
  13. ↑ Angus Lowe, lead engineering designer (2013). Nescio Bridge (Online video). Arup Group Limited. Event occurs at 00:08. Retrieved 2015-08-30.
  14. ↑ Melkwegbrug by NEXT Architects - ArchDaily (archived)
Panorama of the Nescio Bridge in 2007. Behind it the Zeeburgerbrug
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