#Akashi Strait Bridge Install Six Cell

Akashi Strait, which is used by over 1,400 ves-sels a day, is about 4 km-wide and has a maximum depth of 110 m.The epicenter of the main shock of the 1995 Hyogoken-Nambu earthquake was very close to the construction site of the Akashi Kaikyo Bridge, which will be a.Bridge Typeпјљ Stiffened truss suspension bridge with three spans and two hinges Ground Breaking Ceremonyпјљ ApCommenced on-Site Constructionпјљ Opened to Trafficпјљ April 5, 1998The Akashi Kaiky Bridge ( Akashi Kaiky -hashi), also known as the Pearl Bridge, links the city of Kobe on the mainland of Honshu to Iwaya on Awaji Island, in Japan.It crosses the busy Akashi Strait (Akashi Kaiky in Japanese). The Akashi Kaikyo (Strait) Bridge, constructed over Akashi Straitto link Kobe City and Awajishima Island,is the world-longest suspension bridge with a total length of 3,911 m and a center span of 1,991 m (Figs.

The bridge was designed by engineer Satoshi Kashima and built by Matsuo Bridge Co., responsible for building some of the most famous bridges to date, including the Akashi-Kaikyo Bridge. Opened on April 5, 1998, became the longest bridge of its kind in the world, surpassing the Humber Bridge in the UK that has a central span of 1,410 meters. Hanging Akashi-Kaikyo Bridge (AKB), in Japan, also known as Pearl Bridge, with a total length of 3.910m is formed by three spans, the central 1990 meters. The spectacular view of the bridge in the night resulted in the name, Pearl Bridge.The Bridge had been constructed in severe conditions such as high tidal current and deep strait by gathering bridge technologies.Full-scale measurement data observed on the AkashiKaikyo Bridge during strong typhoons were analyzed. The suspension bridge connects the city of Kobe (mainland of Honshu) to Iwaya (Awaji Island) in Japan. The height of the bridge tower is about 300 m high as well as that of Tokyo Tower (333 m high).Akashi Kaikyo is a 3.9km-long bridge built across the Akashi Strait, a 1,500m international shipping canal that connects the Pacific Ocean to the Sea of Japan.

The bridge towers have mass dampers in order to reduce vibrations in the structure during earthquakes and typhoons.The original plan for AKB, that also contained railway lines, was about to be canceled by the government, but in 1985 the decision to limit its use only as road was taken. The change in length was absorbed into the final design which slightly altered in some meters. The initial length was 1.990 meters planned for the main span, but the quake moved the towers 1 meter separating, when they had notstarted construction of the deck yet.

Akashi side strata consist of 40% of gravel of between 10-20 cm in diameter and Kobe side is a layer made вЂ‹вЂ‹of hard unconsolidated muddy and sandy silt or sandstone.The Akashi-Kaikyo suspension bridge has a length of 3,911 m and three bays. To ensure the safety of maritime traffic, has been established by law, an international waterway 1,500 meters wide for safety of maritime traffic.Geologically the floor of the strait is composed of diluvial sediments and granite. The Strait has been a productive fishing area since ancient times, and is an important waterway, used by more than 1,400 boats a day. The segment crossed by the bridge has a maximum depth of 110 meters and a maximum current speed of 4.5 meters per second.

The new distance is incorporated into the design.At its core the bridge offers a height of 97m from the water level to the bottom of the board and a light of 65.75m for the passage of vessels.In the design of AKB, there was special consideration on the effect that the structure would have on the environment. Originally the central span was designed to measure 1.990m, but the Great Hanshin Earthquake, the January 17, 1995, moved the 1m towers, so far the only thing that was up. The height of the main towers is 282.8m above the water, 297,30m until the end of the anchors, the structure is submerged 60m below the water level.

Floods, earthquakes, high tides and tsunamis.The Japanese engineer familiar with the terrible weather conditions, placed the bridge deck on a support frame formed by a complex network of triangular support below the road. Japan experiment one of the worst conditions on the planet. To reduce maintenance requirements, a final coat of paint highly resistant fluoropolymer was used to maintain the shine and prevent corrosion.The bridge was built under severe conditions, such as extremely strong currents Strait and tidal depth, using the latest technologies developed for the construction of bridges. This color was chosen because it is a modern color that blends well with a cityscape and is active, but gentle, beautifying the colors of sea and sky Strait. Design features include special shapes and exterior wall cladding.The gray-green paint used for AKB is different from the color used on other bridges Honshu-Shikoku sistma linking the islands. The anchorages are designed to make the huge concrete structures seem small and balanced.

Steel cables with a diameter of 112cm contain 36,830 lines of wire. The bridge also contains pendulums which are designed to operate at the resonant frequency of the bridge to dampen forcesThe two main supporting towers rise 282.8 meters above sea level, 297.30m to the end of the anchor cable, the bridge can be expanded by the heat of up to 2 m in the course of a day. In the bridge design system strengthening beams with two hinges allow the structure to withstand winds of 290 km / hour, earthquakes with a magnitude of up to 8.5 on the Richter scale and strong currents was also applied. Test your ability is to have withstood the earthquake of Januwith 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. 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.

Akashi Strait Bridge Install Six Cell

Is suspended and supported by the cables cover is held by its own weight, resulting in thousands of steel beams positioned to form a triangular grid. The circular-shaped drawer has no directional property, and thus makes them more stable and easier to handle in strong currents of the Strait.The construction of the stiffening beam, by the method of flat blocks, begins in the towers and main anchors, where a floating crane was used to install six cell blocks in the towers, and 8 anchors.The 4km of the pathway for vehicles that crosses the Akashi Strait is divided into 6 lanes. 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 drawers are installed using the вЂњmethod of adjustmentвЂќ, which involved the manufacture of the drawers in a factory, then towed to the site, submerging, and eventually, filling underwater concrete. The footbed, 60 meters under water, was excavated by a dredger bucket.

For the foundation, underwater towers developed a new type of mixing a вЂњconcrete submarine that is not brokenвЂќ (a вЂњnondisintegration concrete).The Akashi Kaikyo Bridge-has a total of 1,737 light fixtures: 1084 for the main cables, 116 for the main towers, beams and 405 to 132 for the anchors. Has also been used reinforced concrete. A steel mesh was placed in the center and side rails to allow passage of the wind.The main material used in the bridge superstructure is steel.

Steel cables with a diameter of 112cm contain 36,830 lines of wire.Method of construction: PS (Precast Strand) вЂ“ ultimate tensile strength cable: approx. A minimum of 28 patterns are used for special occasions such as regional public holidays or commemorations.The length of the cables used in the bridge amounts to 300,000 kilometers, enough to circle the earth 7.5 times. The RGB model and computer technology contribute in making a wide variety of combinations.

Due to the large size of the bridge, the wind load which must face is higher than that of any other existing bridge when construction was completed. 560 tons вЂ“ Material: galvanized steel wire of high resistanceTensile cable: 180 kg / mm 2 вЂ“ Cable diameter: 1122 mm (not including packaging)Composition: 5.23 mm wire diameter * 127 / * 290 stranded wire / cable wire * 2 вЂ“ Total Number of Conductors: 36830Strand Length: 4,071m вЂ“ 4,074m вЂ“ Total cable length: 300,000 kmWeight of main steel cable: 50,500 tons вЂ“ suspension ropes, etc ashlar: 7,200 tonsIn beams were used 90.000tn reinforcement steel.