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石海峡大橋 ? )
Akashi Kaikyō Bridge from the air Other name(s) Pearl bridge Carries 6 lanes of roadway Crosses Akashi Strait [1]
Locale Awaji Island and Kobe [1]
Maintained by Honshu-Shikoku Bridge Authority Design Suspension bridge [1]
Total length 3,911 meters (12,831 ft)
Height 282.8 metres (928 ft) (pylons) [1]
Longest span 1,991 meters (6,532 ft) [1]
Clearance below 65.72 metres Construction begin 1988 [1]
Construction end 1998 [1]
Opened April 5, 1998 Toll ¥2,300 Coordinates 34°36′59″N 135°01′13″E
The Akashi-Kaikyō Bridge (明石海峡大橋 Akashi Kaikyō Ō-hashi ? ), also known as the Pearl Bridge, has the longest central span of any suspension
bridge, [2] at 1,991 metres (6,532 ft). It is located in
Japan and was completed in 1998. [1] The bridge links the city of Kobe on the mainland of Honshu to Iwaya on Awaji Island by crossing the busy Akashi Strait. It carries part of the Honshu-Shikoku Highway.
The bridge is one of the key links of the Honshū-Shikoku Bridge Project, which created three routes across the Inland Sea.
Hide History
Before the Akashi Kaikyō Bridge was built, ferries carried passengers across the Akashi Strait in Japan. This dangerous waterway often experiences severe storms and, in 1955, two ferries sank in the strait during a storm, killing 168 people. The ensuing shock and public outrage convinced the Japanese government to develop plans for a suspension bridge to cross the strait. The original plan called for a mixed railway-road bridge, but when construction on the bridge began in April 1988, the construction was restricted to road only, with six lanes. Actual construction did not begin until May 1988, and the
bridge was opened for traffic on April 5, 1998. [3] The Akashi Strait is an international waterway that necessitated the provision of a 1,500-metre (4,921 ft)-wide shipping lane.
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Hide Architecture
Main supporting towers
The bridge has three spans. The central span is
1,991 m (6,532 ft), [1] and the two other sectionsare each 960 m (3,150 ft). The bridge is 3,911 m (12,831 ft) long overall. The central span was originally only 1,990 m (6,529 ft), but the Great Hanshin earthquake on January 17, 1995, moved the two towers sufficiently (only the towers had been erected at the time) so that it had to be increased by
1 m (3.3 ft). [1]
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 298 m (978 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. Each anchorage required 350,000 tonnes (340,000 long tons; 390,000 short tons) of concrete. The steel cables have 300,000 kilometres (190,000 mi) of wire: each cable is 112 centimetres (44 in) in diameter and contains 36,830
strands of wire. [2][4]
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. The RGB model and computer technology make for a variety of combinations. Currently, 28 patterns are used for occasions as national or regional holidays, memorial days or
festivities. [citation needed]
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Hide Use
The total cost is estimated at 500 billion yen, and is expected to be repaid by charging drivers a toll to cross the bridge. The toll is 2,300 yen and the bridge
is used by approximately 23,000 cars per day
Akashi Kaikyō Bridge from the air Other name(s) Pearl bridge Carries 6 lanes of roadway Crosses Akashi Strait [1]
Locale Awaji Island and Kobe [1]
Maintained by Honshu-Shikoku Bridge Authority Design Suspension bridge [1]
Total length 3,911 meters (12,831 ft)
Height 282.8 metres (928 ft) (pylons) [1]
Longest span 1,991 meters (6,532 ft) [1]
Clearance below 65.72 metres Construction begin 1988 [1]
Construction end 1998 [1]
Opened April 5, 1998 Toll ¥2,300 Coordinates 34°36′59″N 135°01′13″E
The Akashi-Kaikyō Bridge (明石海峡大橋 Akashi Kaikyō Ō-hashi ? ), also known as the Pearl Bridge, has the longest central span of any suspension
bridge, [2] at 1,991 metres (6,532 ft). It is located in
Japan and was completed in 1998. [1] The bridge links the city of Kobe on the mainland of Honshu to Iwaya on Awaji Island by crossing the busy Akashi Strait. It carries part of the Honshu-Shikoku Highway.
The bridge is one of the key links of the Honshū-Shikoku Bridge Project, which created three routes across the Inland Sea.
Hide History
Before the Akashi Kaikyō Bridge was built, ferries carried passengers across the Akashi Strait in Japan. This dangerous waterway often experiences severe storms and, in 1955, two ferries sank in the strait during a storm, killing 168 people. The ensuing shock and public outrage convinced the Japanese government to develop plans for a suspension bridge to cross the strait. The original plan called for a mixed railway-road bridge, but when construction on the bridge began in April 1988, the construction was restricted to road only, with six lanes. Actual construction did not begin until May 1988, and the
bridge was opened for traffic on April 5, 1998. [3] The Akashi Strait is an international waterway that necessitated the provision of a 1,500-metre (4,921 ft)-wide shipping lane.
↑Jump back a section
Hide Architecture
Main supporting towers
The bridge has three spans. The central span is
1,991 m (6,532 ft), [1] and the two other sectionsare each 960 m (3,150 ft). The bridge is 3,911 m (12,831 ft) long overall. The central span was originally only 1,990 m (6,529 ft), but the Great Hanshin earthquake on January 17, 1995, moved the two towers sufficiently (only the towers had been erected at the time) so that it had to be increased by
1 m (3.3 ft). [1]
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 298 m (978 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. Each anchorage required 350,000 tonnes (340,000 long tons; 390,000 short tons) of concrete. The steel cables have 300,000 kilometres (190,000 mi) of wire: each cable is 112 centimetres (44 in) in diameter and contains 36,830
strands of wire. [2][4]
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. The RGB model and computer technology make for a variety of combinations. Currently, 28 patterns are used for occasions as national or regional holidays, memorial days or
festivities. [citation needed]
↑Jump back a section
Hide Use
The total cost is estimated at 500 billion yen, and is expected to be repaid by charging drivers a toll to cross the bridge. The toll is 2,300 yen and the bridge
is used by approximately 23,000 cars per day
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