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Akashi Kaikyo Bridge, Japan
Transcript of Akashi Kaikyo Bridge, Japan
What are bridges?
In earliest times bridges consisted of simply just a wooden plank. Today there are complex structures that can span several hundred meters.
Akashi Kaikyo Bridge
The Akashi Kaikyo Bridge is also known as the Pearl Bridge.
Since its completion, in 1998, the bridge has the longest central span of any suspension bridge in the world, at 1,991 meters (6,532 ft).
The Akashi Kaikyo bridge is in Japan.
What makes it strong?
The bridge was designed with a two hinged stiffening girder system, allowing the structure to withstand winds of 286 kilometres per hour (178 mph), earthquakes measuring to 8.5 on the Richter scale, and harsh sea currents. The bridge also contains pendulums that are designed to operate at the resonance frequency of the bridge to dampen forces. The two main supporting towers rise 282.8 m (928 ft) above sea level, and the bridge can expand because of heat by up to 2 m (7 ft) over the course of a day.
Types of bridges.
Bridges are of different kinds:
- beam bridge
- truss bridge
- arch bridge
- suspension bridge
Types of bridges
Abiha Ahmed, Alvina Liaqat, Iqra Haq & Sana Rehman
Teacher: Ma'am Amna Sharjeel
Where is it??
Who built it??
The designer of the bridge was Satoshi Kashima. It's construction began in 1988 and was completed in 1998.
What ares does it connect?
Which river does it cross??
The Akashi Kaikyo bridge connects Kobe on the mainland of Honshu to Iwaya on Awaji Island, in Japan. It crosses the busy Akashi Strait. It carries part of the Honshu-Shikoku Highway.
The bridge has three spans. The central span is 1,991 m and the two other sections are each 960 m. The bridge is 3,911 m (12,831 ft) long overall. Each anchorage required 350,000 tonnes of concrete. The steel cables have 300,000 kilometers of wire: each cable is 112 centimeters in diameter and contains 36,830 strands of wire. The Akashi-Kaikyo bridge has a total of 1,737 illumination lights: 1,084 for the main cables, 116 for the main towers, 405 for the girders and 132 for the anchorages. On the main cables three high light discharged tubes are mounted in the colors red, green and blue. Currently, 28 patterns are used for occasions and holidays.
Other name(s) Pearl bridge
Carries six lanes of roadway
Crosses Akashi Strait
Locale Awaji Island and Kobe
Maintained by Honshu-Shikoku Bridge Authority
Designer Satoshi Kashima
Design Suspension bridge
Total length 3,911 meters (12,831 ft)
Height 282.8 meters (928 ft) (pylons)
Longest span 1,991 meters (6,532 ft)
Clearance below 65.72 meters
Construction begin 1988
Construction end 1998
Opened April 5, 1998
Coordinates 34°36′59″N 135°01′13″E
Akashi Kaikyo Bridge
Why was it built?