Wednesday, October 11, 2023

1995 Shiosai Pedestrian Bridge over Kikukawa River in Enshunada, Japan

(Satellite, 829 photos)

This bridge is another example of Japan using significant resources to support pedestrian and bike traffic.

Highway Engineering Discoveries posted
amazing Bridge
[Several comments pointed out that it is better for a concrete arch to be in compression instead of tension.]
SZ Abidin: SHIOSAI BRIDGE IN JAPAN - The Shiosai Bridge in Shizuoka, Japan, is a prestressed concrete four-span stress-ribbon bridge with roadway slab decks, which forms a so-called inverted suspension bridge. The bridge, for cyclists and pedestrians, was completed in 1995. The superstructure consists of roadway slab decks, columns which support the slab decks, and stress ribbons forming the lower cord. The bridge length is 232 m, the clear width is 3.0 m, and the span lengths are 55, 61, 61 and 55 m.
In this structure, loads are transferred via the slab decks into the columns, which are supported by the stress ribbons that in turn are supported by the piers and abutments. Overall stiffness was increased using elastic connections with horizontal neoprene bearings, which were installed between the ends of the roadway slabs and the abutments. Most of the superstructures were precast using lightweight concrete, in order to minimize the horizontal forces acting on the abutments, thus making the structure more economical. To ensure corrosion protection, epoxy-coated prestressing strands were used for bearing cables and prestressing cables for the stress ribbon.
SZ Abidin I see there are multiple sources for that description. This one has a lower resolution copy of the posted photo. https://www.youngcivilengineering.com/2017/01/shiosai-bridge-in-japan.html

Dennis DeBruler commented on Abidin's comment
SZ Abidin And here is the photo from the reference from which you copied:
 https://iabse-bd.org/old/43.pdf

I presume the structure in the left background is a floodgate.
guidoor

This view confirms that the river has levees on both banks.
Street View, Jun 0223

Alpsdake, License: Creative Commons Attribution-Share-Alike (CC BY-SA)

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