Aigawa Bridge

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Aigawa Bridge
安威川橋
Ibaraki, Osaka, Japan
(246) feet high / (75) meters high
587 foot span / 179 meter span
20??

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Aigawa Bridge has the longest corrugated beam span ever built at 179 meters. The hybrid style uses steel for the walls of an otherwise concrete box beam span and is popular due to the reduction in weight which leads to reduced seismic forces and smaller substructures lowering cost and allowing longer spans. Corrugated steel webs without additional stiffeners also have higher shear-buckling strength than that of flat plate steel webs. Corrugated steel webs are more easily fabricated and constructed than concrete webs. Less onsite concrete work saves time and money. Prestressing can be efficiently introduced into the top and bottom concrete slabs due to the so-called “accordion effect” of corrugated webs and the external post-tensioned tendons used with corrugated steel webs have many advantages over the internal bonded tendons.

The Aigawa Bridge is composed of two separate viaducts with span configurations of 636 meters (50.4+120.0+179.0+99.5+3@50.0+33.9) and 545.5 meters (65.4+142.0+170.0+120.5+44.4).

The French built the first few corrugated beams spans in the 80s and 90s but the Japanese really took off with the style with well over 200 constructed since 1993.


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Aigawa Bridge satellite image.


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Aigawa Bridge location map.