Failure Analysis Report on the Tacoma Narrows Bridge

Introduction This memo is a failure analysis report of Tacoma Strait Bridge. The bridge collapsed within 4 months of being released to the public on July 7, 1940, July 1, 1940 (Green, 2006). The only casualties (good news) due to the collapse of the bridge were journalist Leonard Coatsworth cars and dogs. As well as how to design a new suspension bridge, we will also explain the design and damage of the bridge. Breakdown Description Other similar construction bridges such as the Golden Gate Bridge in San Francisco can cause vertical vibration during an intense storm with amplitude up to 2 feet and horizontal vibration up to 6 feet (Levy, 1992).

Tacama Channel Bridge was the first Tacoma Channel Bridge in 1940. This is a suspension bridge across the Tacoma Strait of Puget Sound between Washington State and Tacoma and Kissap Peninsula. It opened on 1 July 1940 and became Puget Sound on 7 November the same year. At the time of construction (and its destruction), this bridge is the length of the world's third longest suspension bridge, the main span, behind the Golden Gate Bridge and the George Washington Bridge.

The Tacoma Bridge is a pair of twin suspension bridges over the Tacoma Channel in Puget Sound, Pears County, Washington. These bridges connect the Tacoma City and the Kisap Peninsula, carry National Route 16 across the Strait (it is known as the 14 major state national roads until 1964). Historically, the name "Tacoma Strait Bridge" was applied to the original bridge opened in July 1940 with the nickname "Galloping Gertie", but it collapsed due to aerodynamic elastic flutter and reached 1950 yuan The bridge was opened in that year. Today is still a road to the west of Ssangbashi Bridge.

When opening in 1940, the Tacoma Bridge was the third longest suspension bridge in the world. The bridge crosses the Tacoma Narrows and goes to the Gig Harbor Peninsula, replacing the ferry pedestrian commuting from Tacoma and takes 3 years with a total length of 2,800 feet. Time will be created. To save cost, the lead engineer Leon Moisseiff designed a very thin frame that is 39 feet long and has only two lanes. The Tacoma Channel Bridge opened on July 1, 1940. The flow of people in the Tacoma Channel has increased significantly, but many drivers are attracted to paid bridges through not only convenience but also abnormal features of the structure. As they do in the Tacoma Channel, the bridge will swing horizontally as it strikes the wind, sometimes it will experience excessive vertical rise.

The collapse of the Tacoma Channel Bridge in 1940 revealed the limit of deflection theory for the first time. Since the Tacoma disaster, aerodynamic stability analysis complemented the theory, but we can not replace it. Deflection theory is still an integral part of the suspension bridge project. Today, theoretical theory is used as a model for structural engineers to compute complicated analysis methods (such as "finite element" computer program) for the stress of sling system.