Higashimaiko-cho, Tarumi-ku, Kobe-shi, Hyogo-ken. Cross or climb the world's longest suspension bridge linking Kobe and Awaji Island. Quick Facts. Spans the width of the dramatic Akashi Strait. The bridge was opened in Illuminated by over 1, lights. You can climb to the top of the towers. How to Get There. Special sparkle. Stormy weather—a history of the bridge. Attraction Bridge Scenic Spot.
Near Akashi Kaikyo Bridge. The total weight of the super-structure is distributed as follows: Two main springs as an extension for laying the foundations of the towers were built with round and flat, the largest with a diameter of 80m and the other 78m. Drawer descending method was used for large profundad position and ocean currents in its construction. Each anchor requires, an average of , tons of concrete. Also, large deep foundation anchors were built on reclaimed land with many new technologies.
All foundations were well designed to cope with the strong earthquakes with a seismic design method of new research, together with a new kind of concrete result of a mixture of different water resistant cements and erosion.
Test your ability is to have withstood the earthquake of January 17, with almost no incidents, just the displacement of 1m of the towers, that given the strength of the movement can be considered minimal.
In the two main towers 20 mass dampers, TMDs, were placed, pivoting in the direction opposite to the wind when it blows on one side of the bridge, dampers sway in the opposite direction, effectively balancing the bridge and placed negating the influence of wind.
The bridge also contains pendulums which are designed to operate at the resonant frequency of the bridge to dampen forces.
The two main supporting towers rise Steel cables with a diameter of cm contain 36, lines of wire. The bridge is supported by two cables basically the central section, considered the toughest in the world constructed.
The primary tower is made of steel, and the shaft has a cruciform cross section which is insensitive to wind-induced oscillation. However, tuned mass damper is installed within the shafts to suppress oscillation is anticipated that during erection of the tower, and even at the stage of completing the bridge.
A shaft of the tower is divided into 30 levels and almost all levels are composed of 3 blocks. Each block was made in factories and transported to the site and then hoisted by crane climbing tower that had a lifting capacity of tons. Articulating high tension bolts were used to connect field.
A foundation of the main tower weight of , tn weighing bridge from the main towers footbed transmitted. The footbed, 60 meters under water, was excavated by a dredger bucket. To overcome the difficult conditions of the strait, including deepwater strong currents and waves that caused vibration in the dredger during excavation, high-tech devices are used, such as Remotely Operated Vehicle System.
The circular-shaped drawer has no directional property, and thus makes them more stable and easier to handle in strong currents of the Strait. Prior to the bridge's construction, it was considered one of the world's most dangerous waterways. For example, in a severe storm caused two ferries to sink resulting in the deaths of people. As a result, the Japanese government decided the strait needed a suspension bridge to cross the strait. Originally, the plan was to construct a railway along with a road bridge.
But the construction was finally restricted to a road bridge. It is a substantial 6-lane road bridge that connects Kobe on the main island of Honshu with Iwyaya on the smaller Japanese island of Awaji. The bridge is 3, meters long, has three spans supported by two main supporting towers that stand meters apiece and a series of anchoring cables. This makes Akashi Kaikyo Bridge also one of the world's tallest. The towers needed to be tall enough to anchor the cabling required to support the spans, but also tall enough to allow boat traffic pass unimpeded below her.
Her central span had originally been planned to be 1, meters long, but plans were revised following the Kobe earthquake forced the towers that were under construction apart by around 1 meter making it 1, meters today. As the bridge stands in a seismically unstable part of the world, engineers needed to ensure her design would stand the test of time. Yet despite her inherent strength, the bridge is also able to expand and contract several times a day.
In addition, engineers placed 20 tuned mass dampers TMDs in each tower. The TMDs swing in the opposite direction of the wind sway. So when the wind blows the bridge in one direction, the TMDs sway in the opposite direction, effectively "balancing" the bridge and canceling out the sway.
With this design, the Akashi Kaikyo can handle mile-per-hour winds, and it can withstand an earthquake with a magnitude of up to 8. Educators' Guide Shop. Fast Facts: The bridge is so long, it would take eight Sears Towers laid end to end to span the same distance.
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