Types Of Bridges Research Paper

A simple beam bridge that is flat across and supported at the two ends. A longer beam bridge can be held up along the middle by piers standing in the river. The weight of the bridge itself, plus the load that it carries, plus gravity are the downward forces are spread evenly across the length of the bridge. The upwards forces that hold the bridge up come from the piers. The Confederation Bridge in Canada is a famous beam bridge.

Initially, suspension bridges before 1940 were made of piers, towers, wires, anchorages, and roadways. Piers were the main foundation for the suspension bridges. There usually were two of them, which were made out of cement and were entrenched in ground underneath the body of water that the bridge was spanned across. Towers were built on top of the piers to provide a means of connection for the roadways and wires. Wires were connected to the towers, roadways, and anchorages to provide tension support for the weight of the bridge. The anchorages were large cement platforms that were planted into the ground on either side of the land so that the wires could be connected to it. Lastly, the roadways were the main point of the suspension bridge. They usually were wide enough to provide four lanes of traffic and stretched from one side of the bridge to the other. This was the basic design of the suspension bridges

Bridges are a vital part of people’s everyday life and without them people would not be able to do nearly as much as is possible today. The weather in the outer banks of North Carolina is very rough and can be very detrimental to the various structures on them. When hurricanes come near North Carolina the outer banks are hit the worst. Bridges on the outer banks keep being destroyed by weather and so the people there have to think about the cost, the effectiveness, and the need between a strong expensive bridge that will be able to handle rough weather or a cheap quick to build bridges that may fall with any extreme weather.

The Pratt truss bridge was originally founded by Caleb and Thomas Pratt in 1844. It is mainly used to carry trains. The biggest advantage of this bridge was its low costs for construction and the materials to construct a truss bridge are minimal. It also use materials that is cheaper and light in weight. We can easily identify a pratt truss by detecting its diagonal members, which (excluding for the very end ones) all slant down and in toward the center of the span. The pratt truss was designed by applying few laws that related to the mechanics of materials concept. The bridge is mainly built using steel girders to support the construction of the structure. The below part of bridge weight is high so, it need an enough support to prevent from

•September/2016 - After the layout of the gravel and topsoil has been accomplished the next process is to begin the building of any bridges over waterways and boardwalks to include low, wet spots that were unable to be dugout. Due to the use of equestrian or ATv usage the bridges will need to be structurally strong using items such as steel or high strength treated lumber.

Hecox (2011) says that the arch structure of the Tillman Bridge makes the canyon walls hold the weight of both vehicles and the bridge itself. In addition, the arch structure allows a better vision of the canyon for the drivers, which was a request of the population to the engineers of the project. In the other hand, according to Jones (2015), the truss structure of the new St. Anthony Bridge also was requested by the population because they wanted to keep a truss bridge in that place. The author also affirms that the St. Anthony Bridge is a truss, but the project team proposed adding a posttensioned concrete bottom chord to the steel truss in order to reinforce it. The project team made this choice because one bridge in Minnesota has collapsed in 2007, and the engineers wanted to lessen the fracture-critical issues to avoid a new catastrophe. In addition, this posttensioning approach wiil make the structure redundant for both resiliency and long-term durability. In conclusion, both bridge's structures were right chosen in order to provide safety and beauty in both

Concrete one of the most common and appropriate material in building a bridge. Concrete is strong in compression but weak in tension. However, concrete embedded with steel bars, known as reinforced concrete, serves as a solution for the steel carries all the tension. Less concrete will be used with reinforced concrete and the concrete that is used protects the steel from fire and corrosion.

Have u ever been on a bridge before. Well I haven't but I'll am going to talk about four different famous bridges and they are all suspension bridges. They are a lot of suspension bridges out in the world and that you can't study all of them at once. Also you can go on the bridges if you wanted to but if you wanted to you should go on one of these bridges I'll be talking about. Also all the bridges are one of the most outstanding bridges then the rest and they stand out then all of the other shiny gold and metal build sides and and the sparkling lights. The bridges I will be talking about is the Golden Gate Bridge, and the second one is the Brooklyn Bridge, the George Washington Bridge, and the last one is the Verrazano Narrows Bridge.

A bridge is a load bearing structure spanning a passage over a gap or barrier, such as a river or roadway. Some examples of bridge types are; suspension bridge (George Washington Bridge connecting New Jersey with New York City), truss arch bridge (Hurricane Deck Bridge in Hurricane Deck, Missouri), and a cable-stayed bridge (The modern Sunshine Skyway Bridge in Saint Petersburg). Another example is a cantilever bridge (the former Sunshine Skyway Bridge). Rarely do these structures ever have catastrophic malfunctions, however, it does happen. The citizens of Saint Petersburg, Florida who have lived here since 1980 remember the collapse of the old Sunshine Skyway Bridge. On May 9, 1980, a large ship hit the Skyway in the fog and it collapsed,

Hi, my name is Maryum and the bridges that I researched about are the Golden Gate Bridge, the Batman Bridge, the Auckland Harbor Bridge, the Bixby Creek Bridge, and the Quebec Bridge.

Design Elements: While building this bridge, the first design element, was the deck design. We took around one horizontal length of vertical popsicle sticks and lined them side by side, and repeated. Later we connected them together with a horizontal popsicle stick. I then took two lines and placed them ontop of eachother to create a flat surface. This way it will carry a lot of weight, and it will also run smoothly. After this I created trusses to put on the side, so that the weight would be evenly distributed amongst the bridge, instead of all the weight on one part. This would help stop the bridge from immediately bending once weights were put into the bucket. To make the trusses I had to take popsicle sticks and glue them into a triangle shape, and then glue them together from the bottom. This way they wouldn’t break apart. I then doubled them up so that it would be able to sustain more weight. Under the bridge I placed a lot of beams, so that the bridge would hold together from the bottom, instead of immediately bending once I placed a weight. I made the beam from gluing

stone towers that served no other purpose than to be visually appealing. In Australia, Sir Ralph Freeman designed a two-hinged arched bridge that spanned 1,650 feet. The Sydney Harbour Bridge was constructed with high-strength silicon steel, which makes it “the heaviest steelwork of its kind.” Another type of bridge that employs the use of steel are suspension bridges. The Brooklyn Bridge, completed in 1883 and designed by John Roebling, was the first bridge to use galvanized steel wire cables. By the beginning of the 20th Century, suspension bridges were gaining popularity. The growing population of New York City, increased demand for new bridges. Two more suspension bridges, The Williamsburg Bridge, completed in 1903, designed by L.L.

It is shaped in a way to transfer weight to the towers and anchors with its tension (O'Connor, 1971, p. 372). Cables are made of high strength wires spirally bound to form a rope (O'Connor, 1971, p. 372). Vertical cable suspenders that are fastened to the main cables hang the actual roadway. Stiffening girders and trusses are along the side of the bridge to distribute concentrated loads and help to keep the motion of the bridge at a minimum (Troitsky, 1994, p115).

What are bridges used for? They are used for the world to transport goods in railways and to support vehicles across landscapes and water. The Truss bridges have many different types which all triangular figures are put to use in the design of each bridge. Most bridges were made with these designs across the world around the 19th century, but today there are only a few left in America and most have been rebuilt. The most common types of Truss bridges are: Warren Truss, Pratt Truss, and Howe Truss. The man who built the Truss bridges was from France and his name was Alfred Neville.

Truss Bridges are a common style of bridges used in the United States and all around the world. Some characteristics of truss bridge are joining a variety of relatively small structural members in a series of interconnected triangles. The vertical columns might work on tension and compression, but it depends on the dynamic loads that are applied and the complexity of the bridge. Many of the Howe truss were usually located in the North West part of the U.S because of the supplies available to them. The Howe truss was first introduced by William Howe in 1840 (Boom, Garrett. January 18, 2011.Garrett Bridges Howe Truss. www.garrettbridges.com).This style of bridge became very popular and was considered the best design to use in railroad bridges back in the 1800s. The lenticular truss is a unique design in which both the top