vBridge is a structure that allows you to go over obstacles such as valleys, rough terrain or water by spanning those obstacles with natural or manmade materials. In the past people invented bridges to cross small distance over simple obstacle such as a pond, they used a simple logs or two vines and put it over the distance they wanted to cross. However, today bridges are much more complex. Todays bridges are made of stone, wood, steel, and reinforced concrete. Metals such as aluminum, titanium. Using these material, our modern brides are much more durable than the ones made in the past. Today, bridges are used similarly, but the only difference is that we now make bridges to make crossing lage distance faster and more convenient rather than …show more content…
Known for being the busiest bridge in the world because of the traffic it encounters during rush hours. The advantage for George Washington Bridge was that, two lanes were added to the original six on the upper deck. Then the upper-deck median barrier was added in 1962. For safety reasons workers wear two harnesses and everything is securely attached, because if anything were to fall then it will create a traffic accident and sudden weather can change everything. The Disadvantage was that the speed limit on the bridge is 45 mph (70 km/h), though heavy traffic is common and frequently it makes it difficult to reach such speeds when crossing it. The workers that painted the bridge had to go all the way to the top to paint, they have to look straight when going up. If there is a mistake there is a net below that will catch them if they fell. The dangerous part is the barrels of the bridge is round and sloping. The George Washington Bridge was completed eight months ahead of schedule and under budget. Also when it was completed in 1931 the George Washington was the longest suspension bridge in the world. But was eventually displaced as the longest bridge by San Francisco’s Golden Gate Bridge in …show more content…
The bridge collapsed december 16, 1967, and killed about 46 people and seriously injured 9 others. The bridge collapse was due to the defect of a single bridge support link, which was “a brittle fracture of the lower half of the eye, then a ductile fracture of the upper half,…resulting in pulling…the companion eyebar off the pin which had connected it with the fractured eyebar”, this caused an inevitable failure of the bridge. Overall, a major factor in this bridge collapse was was the bridges design in general. “The eyebar chains supporting the bridge deck were made up of long, twelve inch wide, and two inch thick steel beams that had circular “eyes” at each end. Each chain had two eyebars in parallel. When chains met, the two eyebars in parallel were connected to the next two eyebars in parallel in the chain via a single pin. Each chain had two eyebars in parallel. When chains met, the two eyebars in parallel were connected to the next two eyebars in parallel in the chain via a single pin.” In the end, the bridge had many factors that caused it to collapse, but people do learn from accidents like this, and continue to improve what still
According to Wikipedia, Forty-six people were killed in the silver-bridge collapse and another nine people were injured. “The Silver Bridge was an eye-bar-chain suspension bridge built in 1928 and named for the color of its aluminum paint. The bridge connected Point Pleasant, West Virginia, and Gallipolis, Ohio, over the Ohio River” (Wikipedia). This was a highly used bridge serving thousands of cars a day before the collapse. “It was designed with a twenty-two foot roadway and one five-foot sidewalk” (Silver). The silver bridge was a very long bridge. “An eye-bar is a long steel plate having large circular ends with an "eye" or hole through which a
Bering Land Bridge- during it’s time of existence the bridge was a major factor in migration from Asia to North America; made travel easier because it was on land instead of having to travel by boat
It became a link between Fort Erie, Canada and Buffalo, New York. The bridge is over one mile long, 5,800 feet, and holds three lanes of traffic. The center lane may go north or south depending on the volume of traffic. In 1934, the Great Depression caused a change.
Not only has it been a huge cultural monument, but it also has changed the economy of the area. The area no revolves so much on tourism and that is where a lot of their money comes from. Originally, all they wanted was access to the mainland because the people were struggling to get by, but once the bridge was made things changed in a different way. This brought a lot of tourism to the area that they were not originally expecting. This was a necessity of the people and turned out to be a great addition to their area once the bridge was made. There was a lot of talk and it took awhile to pass the building of the bridge, but in the end they made a good decision to build the bridge. This bridge is also very unique in it’s own way, being one of the only bridge’s built in this
The reasons for the collapse are to be found in the acts and omissions of those entrusted with building a bridge of a new and highly sophisticated design.
At the time of its construction in 1929, the Ambassador Bridge was the largest spanned suspension bridge at 564 meters until the George Washington Bridge was built. It was an engineering masterpiece at the time. The total bridge length is 2,286 meters and rises to 118 meters above the river. Suspension cables support the main span of the Ambassador Bridge and the main pillars under the bridge are supported by steel in a cantilever truss structure. In total, the McClintic-Marshall masterpiece is comprised of 21,000 tons of steel. The immense socio-economical impact that the Ambassador Bridge has on transportation and trade is imperative for daily interaction between the Un...
The Golden Gate bridge, standing as an icon of roadway innovations, took multiple engineers years to design and complete. They could not just simply build an ordinary bridge. They had to take into consideration the physics behind it, as well as, what kind of effect the environment would have upon the bridge. The bridge sits along one of the most active fault lines in the world, so engineers had to make sure their bridge could withstand a little movement. Today the Golden Gate bridge still stands tried and true, as does many other innovations that 20th century engineers came up with.
On the day of the collapse, the bridge was undergoing a resurfacing project that closed 4 of the eight lanes. The closed lanes were used as a staging area for sand, gravel, construction materials, and other equipment necessary to complete the work.
On May 24, 1854, construction began of the Victoria Bridge. This was a difficult task for the workers given the size of the bridge (“almost two miles in length from shore to shore” ) was the largest construction project during this period of time. Moreover, the construction of the bridge did not cease during the winter months. Therefore, many of the workers on the bridge would continue even while the St-Lawrence River froze underneath their
This all iron design made the bridge a lot heavier than it was designed for, which added more stress to the truss. This fact, by itself, wouldn’t cause any alarm. However, the bridge itself, was very poorly constructed. The members of the bridge were all different sizes, and they were not connected together properly. Due to the poor construction and eleven years of use, members of the bridge had started to bend due to the stress. Despite bridge engineers inspecting the bridge for eleven years, no one noticed these faults with the bridge. However, the ultimate cause of this collapse, was so tiny, only one of the investigators, after the collapse, noticed it. A tiny air hole was left during the construction of the bridge, “and grew with repeated stress over eleven years” (Escher, 2009). This hole would develop in a crack, due to the changing temperatures and the trains crossing it for over eleven years. This would weaken the overall strength of the bridge. The cold winter air and the weight of the train would ultimately prove to be too much, and the whole bridge came crashing
In 1883 Brooklyn Bridge has opened and it was the longest suspension bridge at that time.It connects Manhattan and Brooklyn by spanning the East river. There is no entry fees for visiting Brooklyn bridge. You can take a bus or train to reach there.
The Tacoma Narrows Bridge is perhaps the most notorious failure in the world of engineering. It collapsed on November 7, 1940 just months after its opening on July 1, 1940. It was designed by Leon Moisseiff and at its time it was the third largest suspension bridge in the world with a center span of over half a mile long. The bridge was very narrow and sleek giving it a look of grace, but this design made it very flexible in the wind. Nicknamed the "Galloping Gertie," because of its undulating behavior, the Tacoma Narrows Bridge drew the attention of motorists seeking a cheap thrill. Drivers felt that they were driving on a roller coaster, as they would disappear from sight in the trough of the wave. On the last day of the bridge's existence it gave fair warning that its destruction was eminent. Not only did it oscillate up and down, but twisted side to side in a cork screw motion. After hours of this violent motion with wind speeds reaching forty and fifty miles per hour, the bridge collapsed. With such a catastrophic failure, many people ask why such an apparently well thought out plan could have failed so badly?(This rhetorical question clearly sets up a position of inquiry-which iniates all research.) The reason for the collapse of the Tacoma Narrows Bridge is still controversial, but three theories reveal the basis of an engineering explanation. (Jason then directly asserts what he found to be a possible answer to his question.)
In her essay,”Importance of the Golden Gate Bridge,” Stephanie Stiavetti suggest that “It maintained this point of pride for nearly 25 years until the Verrazano- Narrows Bridge was built in New York in 1964. Today, this historic San Francisco landmark holds its place as the second largest suspension bridge in the country, behind Verrazano Narrows.” Back then, experts thought that it would be impossible to build a bridge across the tides and currents in that area because strong currents and tides would make construction extremely difficult and dangerous. The water is over 500 feet deep in the center of the channel, and along with the area's strong winds and thick fog, the idea of building a bridge there seemed nearly impossible. Despite all of the problems of building a bridge across the Golden Gate, Joseph Strauss was named as lead engineer for the project. Construction began January 5, 1933, and in the end cost more than $35 million to
built, and after half the livestock and people had left the dry area, the bridge collapsed,
For this bridge its fall was inflicted by an unknown patron. One who’s identity or existence we never see verified. The record of the fall is short in the story described as only being for a moment. Then the bridge was finally introduced to “the sharp rocks which had always gazed up at me so peacefully from the rushing water”. Rocks gazing peacefully? This is almost as absurd as a bridge turning around. An action that the bridge itself cannot seem to believe it is doing. This attempt by the bridge was his final effort before his fall. I cannot even picture how a bridge would turn around and attempt to look on his back. The question that comes to my mind is how can a bridge see what’s on his back? If this book is trying to make us believe that this bridge is a human, or has human like qualities. Then how flexible a person is this bridge? Because I know very few people who can see whats on their back. Especially without turning so much that anything on their back would fall off. So is this bridge so inflexible that it breaks itself by turning around or is it trying to buck off its attacker unintentionally? This answer is never answered due to the story ending shortly thereafter this scene. With the short fall of the bridge onto the sharp rocks it had stared at for the entirety of its life. The events before and during the fall of the bridge was the main issue I had with my thesis that the bridge was