Truss Bridges Research Paper

I will be explaining four of the most popular types of truss bridges in this paragraph. One type of truss is the Allan truss bridge. The Allan truss bridge been in the world of truss bridges for a long time. A fact of the Allan truss is it was first ever build in the 1800s, and the first time the Allan truss was designed was on the date of August 13, 1894. Aldo Alan truss aren’t as common as today there still a very good truss bridge, and quite efficient. Next truss bridge is the Warren truss bridge. A Warren truss bridge is one of the most commonly built truss bridge. That because a Warren truss bridge is simple and is not a big task to build. It uses equilateral triangles to spread out all of the loads from the bridge. It works very well due to all of the triangles minimizing the forces of tension and compression. It’s said to be really light but very efficient, and strong. Another type of truss bridge is a much known truss bridge which is the Baltimore truss bridge. A Baltimore truss bridge is very common to a Pratt truss, the only differences are its additional branchy which is much lower compare to the Pratt truss. The reasons of that are it prevents bucking in the members. The Baltimore truss was first built in the year 1871 for railroads it was first build in the areas such as Baltimore, Pennsylvania, and Ohio. Today it’s one of the most famous type truss bridges in the world. The last bridge on the list is a Pratt truss bridge. It was first develop in the 1800s, and was designed by Caleb Pratt and Thomas in the year 1844. It has a unique and good usage of iron and was first used as a railway which was very popular. It’s very solid and good at taking on compression and tension. Its form is vertical and diagonal that go towards the center of the bridge. Today it’s known as a simple and strong truss bridges that work very efficient and give it one of the tops spots as one of the truss bridges

Trusses are attached in such a way that in the end, they form a triangle. Many different kinds of materials are used to make trusses and material notwithstanding, galvanized metal plates are used to connect them together. Because timber is a reliable material and is easy to use as well, small buildings and houses are built with timber trusses.

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

There are five major metal trusses-the Pratt, Warren, Parker, Camelback, and Pennsylvania. The Pratt truss is a simpler truss that was patented in 1844 by Thomas Pratt, an engineer. He used pins to connect the trusses together. Pratt trusses were used a lot in the last quarter of the nineteenth century and continued into the twentieth century. The Warren truss became more popular in the 1900s after engineers realized it was more structurally logical to rivet and bolt pieces together than to use pins. This truss bridge was fit for highway uses. The Parker truss, which derived from the Pratt truss, was developed in the mid-nineteenth century. It was well suited for especially long spans. The Camelback is closer to the Parker truss which could only be used for long crossings. The Pennsylvania truss is similar to the Pratt truss. It was developed in 1875 and also worked quite well for long

Brunel’s solutions were groundbreaking and critics often questioned his designs. The Clifton Suspension Bridge had the longest span of any bridge in the world when it was completed; the Maidenhead Bridge was both the largest spanning brick arch bridge and the first to use a flattened arch form; and the Royal Albert Bridge was built using lenticular iron trusses.

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.

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

A suspension bridge is a bridge that has large cables that are used to support the bridge and has towers that are used to help anchor the cables. The suspension bridges that we know today are not like the ones that they once were. The suspension bridge used to be much more simple. They were the oldest bridge types made by man and only had cables, no towers. Since they became popular suspension bridges have started to become used more because they can have longer spans, cost less and, are more earthquake proof than other bridge

Kaylie Griffin and I chose to build the Clifton Suspension Bridge. The Clifton Suspension Bridge is a suspension bridge located in Bristol, United Kingdom. A suspension bridge is a type of bridge which the deck is supported by cables that hang vertically off larger cables or hangers. Suspension bridges typically have two towers and are anchored to abutments at their ends.The towers help to support much of the weight that crosses the bridge’s deck, such as cars and people. The towers also dissipate the load directly into the planet Earth. These features of a suspension bridge are why they are strong therefore, one of the more popular designs for a bridge. When building our popsicle bridge, we had to add x shaped joints and brackets to help our

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).

Superstructure bears the load that is being passed over the bridge and it transmits the forces caused by the same to substructure. Load received from the decking is transferred on to the substructure by Bearings. They also distribute the load evenly over the substructure material as it may not have sufficient strength to bear the superstructure load directly. Piers and Abutments are the vertical substructures which transfer the load to the earth in the foundation. Wing walls and returns are constructed as the extension of