Truss Bridge Research Paper

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.

Since the early days, the men try overcome environmental challenges and, in this process, ends up creating amazing masterpieces of engineering. Among this works, the bridges appears as the clearest representatives of how the mankind could adapt to Earth’s contours. If the shape of landscape can’t be changed, the bridges are the solution to link two places and allows the connection of the traffic to improve aspects such as the communication and the trade. Depending to the need, to the sources and to the environment, the bridge can be constructed in a specific configuration. There are five main sorts of bridges configurations. First, there is the simplest bridge, the beam bridge. Second, the arch bridge, one of the oldest kind. There are the truss, composed of set of trellises. Lastly, there are the cable-stayed and

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

Truss bridges have been around for a long time. I see truss bridges the most out of all the different types of bridges and to me it seems like the most popular type of bridge. In addition there are thirty different types of Truss bridges which means that there is a bigger variety of Truss Bridges instead of just having one type. Truss bridges have triangular shaped beams that go all across the bridge. The bridge also is above the roadway instead of under the roadway like the arch bridge. Truss bridges could also stretch very far. The longest cantilever Truss bridge that goes is called Crescent City Connection and it is 13,418 feet long with a width of 52 feet. There is also a really long Truss bridge that is near Hoboken, the name of the bridge

The Principle upon which all trusses rely is that the triangle is the strongest and most rigid geometric Figure. By arranging the framework of triangles in patterns that varied from designer to designer, the structure acquired different appearances and served different purposes depending on the needs of bridge builders. The pony truss, the smallest type and ordinarily confined to lengths under 140 feet, with most under 100 feet, is distinguished by its low profile and absence of bracing above the roadway. The through truss by comparison is greater in length and height and consists of a tunnel-like structure that carries traffic through a system of overhead bracing which ties together the upper chords of the bridge.

There is always a great uncertainties in predicting the loads a bridge might experience at some time in the future. One can never be certain of the weight of the heaviest truck that will cross a bridge. For that reason, my design of a truss bridge will hold a 20-ton load limit. When analyzing both the internal forces and external forces on the bridge, assumptions are made. When taking calculations the system must be modeled as in static equilibrium so we must assume that gravity is downward and that the only force is the load on the bridge .

The truss bridge I will focus on is Hampden Bridge, located in Wagga Wagga, New South Wales. Hampden Bridge is a wood Truss bridge that crosses the Murrumbidgee River in Wagga Wagga, New South Wales. This bridge opened to the public on 11 November 1895 and it was closed in October 1995 due to Wiradjuri Bridge opening. The bridge is 100.5 metres long, all of the 3 truss spans 33.5 metres. Hampden Bridge is the first large overhead-braced truss bridge made by Percy Allan. The bridge was originally designed to be a steel, but the tenders were too expensive. timber was used as the alternative. The Hampden bridge replaced the Wagga Wagga bridge,this bridge was made in 1892 and alos crossed the Murrumbidgee river. Percy Allan made the third of five standard wooden truss bridges. there is a clear difference of development between the pre Allan era and the post Allan era. Allan completely redesigned how timber truss bridges were made in NSW. He often based his bridge design on the American Howe bridge although he exploited the much stronger woods in Australia, to reduce the design its bare essentials, this is show in the differences between the two bridges before Allan made his and Allan’s bridges all around New South

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.

Errrrr spack as the construction workers fall to their death. 11 people died while on the golden bridge working on the bridge. After all those deaths they later installed a net and many people were saved.There are many types of bridges like suspension,beam, truss and arch.So in this nonfiction essay you will know all about suspension,beam, truss and arch bridges. There are many types of bridges that are used for different things. This essay is about different bridges. A suspension bridge is usually a big bridge that stretches a long ways.The first model of a suspension bridge was built in the 1800s in and is used today. Suspension bridges have long cables that hold the bridge without piers. A suspension bridge is a very expensive Bridge because of the materials that it uses. A suspension

The roof trusses are designed with a combination of modern and traditional design. Cleveland Arcade trusses are pin-connected to the steal beams. The efficiency of the trusses seem to be a high efficiency since every truss member is pin connected to the beams which means that the bolts capacity have been taking into consideration as they were designed. Figure 3 shows a side view of the end of a truss member how it is connected to the beam. Moreover, the trusses are designed as arches, which also give its own uniquely design.

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

Referring to the Table 1 for comparison between the two design for bridge which are Cable Bridge and Truss Bridge, Truss Bridge is the better solution. We can see that the cost for building a truss bridge is less than cable bridge. The score for other economic in both bridge designs are equal. In environmental aspect, Truss Bridge have a better score compared to cable bridge. In social aspect, Cable bridge comes out to be better than Truss Bridge. By referring to the table, we can see that Truss Bridge have an average score on all other economic, environmental and social aspect. In my opinion, this is a better option than having one excellent and one worst score.

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).

A bridge is a structure providing path over an obstacle. When constructing a bridge, obstacle can be a river, railway track or a valley and the path provided by bridge can be for a road, pedestrians, a railway, pipelines, viaducts to carry water from rich areas to dry cities, or for commercial purpose to host commercial buildings such as restaurants and shops. A bridge can also be laid to reduce the distance of travel which in turn reduces the time to reach the destination.