[WORLDKINGS] On this day – April 5, 2023 - The 25th Anniversary of Akashi Kaikyo Bridge - The world's longest suspension bridge was inaugurated in Japan (1998)


(Kyluc.vn - Worldkings.org) Akashi Kaikyo Bridge was inaugurated and opened to traffic on April 5, 1998. It was the longest suspension bridge in the world at that time.

The Akashi Kaikyo Bridge, also known in English as the Pearl Bridge, is a suspension bridge which links the city of Kobe on the Japanese island of Honshu to Iwaya on Awaji Island. It is part of the Kobe-Awaji-Naruto Expressway, and crosses the busy and turbulent Akashi Strait. It was put into operation in 1998, and at that time, was the longest central span of any suspension bridge in the world, with a main span of 1991m. The total length of the bridge is 3911m. Currently, it is only the second-longest, behind the 1915 Çanakkale Bridge that was opened in March 2022.


Before the Akashi Kaikyo Bridge was built, ferries carried passengers across the Akashi Strait. A major passageway for shipping, it is also known for its gale, heavy rain, storms, and natural disasters. After several catastrophic accidents, public outrage convinced the Japanese government to develop plans for a bridge to cross the strait.

It cost an estimated 500 billion Japanese yen (U.S. $3.6 billion) to build the bridge. Construction began in 1988 and involved more than 100 contractors. Construction was finished on time in September 1996. In spite of the dangers associated with this type of construction project, elaborate safety procedures paid off. A couple of accidents resulted in six injuries and no deaths, a world-class safety record.

On April 5, 1998, 10 years after construction began, the ribbon was cut to open the world's longest suspension bridge, the Akashi Kaikyo Bridge in Japan. Following a parade of the 1,500 invited guests across the bridge, the Crown Prince and Princess of Japan officiated the formal ceremony.


The bridge was designed with a dual-hinged stiffening girder system, allowing the structure to withstand winds of 286 kilometres per hour (178 mph), earthquakes measuring up to magnitude 8.5, and harsh sea currents. The bridge also contains tuned mass dampers that are designed to operate at the resonance frequency of the bridge to dampen forces. The two main supporting towers are 282.8 m (928 ft) high above sea level.


According to Wikipedia & highways.dot.gov

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