Verrazano Narrows Bridge – 1964 Figure 9 Tacoma Narrows Bridge now known as Verrazano Narrows Bridge During Failure
Taken From: (Wikipedia, 2015)
Leap 6: Wind
The Tacoma Narrows Bridge was opened in 1940 but the design had a flaw. When the bridge deck was subjected to minor winds the deck moved up and downwards and began twisting, the bridge eventually collapsed. Peter Sluszka, a qualified bridge engineer explained that, aerodynamic instability of the Tacoma Narrows Bridge had to do with the shape of the structure that the wind blows across. (Big Bigger Biggest, 2014) documentary stated that in order to reduce the effect of the wind, the flat side of the bridge should have had a streamline profile to deflect the wind in order make it blow …show more content…
The design would also need to accommodate for strong winds as high as 300 km/hr since Japan was located in a high typhoon area. Japan is located in an area of high seismicity so wind was not the only natural event that could threaten the bridge, but earthquakes could cause a problem as well. In order to promote a safe and more desirable design engineers were required to go beyond borders to satisfy these …show more content…
Before the cables are fixed, they must firstly move across the entire span of the bridge. A helicopter was used to carry a pilot rope to the next side of the bank, then the first bundle of cable was pulled across the bridge. The first portion of the cable contained one hundred and twenty seven (127) high tensile galvanized steel wires, and was four kilometres in length (4 km). Two hundred and ninety (290) bundles of cables were shuttled from, one end of the river bank to the other end of the river bank, to form the massive cable that supported one side of the bridge. When the two cables were finished installed (Big Bigger Biggest, 2014)stated that there was enough wire in each of the cables to circle the world seven (7) time and were twenty five thousand tonnes (25,000
Taken From: (Wikipedia, 2015)
Leap 6: Wind
The Tacoma Narrows Bridge was opened in 1940 but the design had a flaw. When the bridge deck was subjected to minor winds the deck moved up and downwards and began twisting, the bridge eventually collapsed. Peter Sluszka, a qualified bridge engineer explained that, aerodynamic instability of the Tacoma Narrows Bridge had to do with the shape of the structure that the wind blows across. (Big Bigger Biggest, 2014) documentary stated that in order to reduce the effect of the wind, the flat side of the bridge should have had a streamline profile to deflect the wind in order make it blow …show more content…
The design would also need to accommodate for strong winds as high as 300 km/hr since Japan was located in a high typhoon area. Japan is located in an area of high seismicity so wind was not the only natural event that could threaten the bridge, but earthquakes could cause a problem as well. In order to promote a safe and more desirable design engineers were required to go beyond borders to satisfy these …show more content…
Before the cables are fixed, they must firstly move across the entire span of the bridge. A helicopter was used to carry a pilot rope to the next side of the bank, then the first bundle of cable was pulled across the bridge. The first portion of the cable contained one hundred and twenty seven (127) high tensile galvanized steel wires, and was four kilometres in length (4 km). Two hundred and ninety (290) bundles of cables were shuttled from, one end of the river bank to the other end of the river bank, to form the massive cable that supported one side of the bridge. When the two cables were finished installed (Big Bigger Biggest, 2014)stated that there was enough wire in each of the cables to circle the world seven (7) time and were twenty five thousand tonnes (25,000