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Essay on suspension bridges
Essay on suspension bridges
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Pros of Suspension Bridges
According to Suspension bridges: Concepts and various innovative techniques of structural evaluation, “During the past 200 years, suspension bridges have been at the forefront in all aspects of structural engineering” (“Suspension”). This statement shows that suspension bridges have been used for over 200 years, and that people are still using them today because they are structurally better bridges. This paper shows four arguments on the advantages of suspension bridges, and why you should use one when building a bridge. When deciding on building a suspension bridge, it has many advantages such as; its lightness, ability to span over a long distance, easy construction, cost effective, easy to maintain, less risk
of structural failure, and benefits vehicles, boats, and traffic loads.
Filibusters can surely be effective for Senate minority leaders. However, it can have both its pros and cons. Some of the advantages include that the filibuster was created to protect the privileges of the Senators in order to fully debate and modify laws in the United States Senate, therefore securing the concern of all the citizens in America. Filibusters tend to exist thanks to the Founding Fathers ideology of designing a democratic government in which politicians became involved and educated throughout many political processes. Whenever a Senator goes on the Senate floor and talks endlessly for hours on a particular issue, it automatically engages attention to the particular matter, such as the 11-hour filibuster Senator Wendy Davis accomplished
Bridge efficiency is important as it helps reduce cost of building while maximizing the strength of the bridge. Many things can influence the bridge’s strength and weight, but the two main things that can cause a bridge to be a failure or success is the design of the bridge and construction of its joints. In order to build a potent balsa truss bridge, it is crucial to know how the layout of members and style of gluing can help increase or decrease strength.
The Capilano Suspension Bridge was built in 1889 across the Capilano River by a Scottish engineer named George Grant Mackay in the city of Vancouver. The bridge was initially constructed from hemp ropes and cedar planks, which were later replaced with more durable steel cables in 1903. Over time, the bridge has exchanged ownership several times and has undergone a series of renovations. This is a paper on the Capilano Bridge. Special focus is given to its history, construction, and impact in its locality.
Following the collapse of the I-35 Bridge, other bridges in the country, with similar construction designs, were scrutinized. According to federal statistics, more than 70,000 of the 607,363 or roughly 12 percent of the bridges in the United States are classified as “structurally deficient.”
Compare with other types of bridges, suspension bridge can span the longest distance without using lots of material. However, if the issue of stiffness was not fully cosidered, vibration would be occurred on the bridge deck under high wind. A few week after the Tacoma Narrow Bridge was operated, the bridge start oscillation and its oscillation kept increasing day by day. Therefore engineers tried to build more cable between the bridge, but it is still unsuccessful. After four months the Tacoma Narrows Bridge was build, the bridgre which normally vibrated in a vertiacal motion, began to oscillate with the opposite side out of phase (torsional model), under the wind of 68 km/h. Due to the extremely violent oscillation, the failure bagan at the mid-...
In a nation dominated by capitalism and free trade, steps are being taken to turn the ability to learn and other education rights into commodities that can be manipulated and controlled by companies. Charter schools are public schools funded by state money, but not unionized; they also can be in the form of a traditional brick and mortar schoolhouse or an online school (Ravitch)(Molnar)(“Preface to 'Are Charter and Magnet Schools Good Alternatives for Students?’”). According to their proponents, charter schools allow parents more sway over their child’s education (Jacoby 77). A charter school proponent Jeff Jacoby states, “Their goal: to build the kind of school that used to be commonplace in America-one providing a rigorous, traditional, fact-based
The death penalty also known as the capital punishment is used to punish the criminal involving in serious criminal cases. This happens after he or she has been found guilty of a crime by the legal system. This form of punishment is to ensure that the person cannot commit future crimes, and/or as a deterrent to potential criminals. The inmates could choose from the following way of death they are lethal injection, electric chair, gas chamber, firing squad, and hanging. Each of these punishments is inhuman and a violation of the 8th amendment of the Constitution.
The bridge would be 3-dimensional and have two sides. A bucket would be hung from one of the supports in the center connecting the two sides. Weight would be added until the bridge broke and could no longer hold it.
The bridge was designed at a time when America was moving toward streamline products, this included the design of bridges. The Tacoma Narrows Bridge was a sleek, graceful looking suspension bridge. Suspension bridges consist of many cables anchored...
These types of bridges are either V-shaped or in an inclined position. An example of this type of bridge is the Albert Bridge in London, England. An additional type of bridge structure is the truss bridge. A truss bridge contains a pattern of diagonal columns that sit on top of the bridge. There are many types of designs, but the most common designs are the king posts, which consist of two diagonal columns supported by a vertical column, and queen posts, which consist of two diagonal columns supported by two vertical and horizontal columns near the peak. An example of a truss bridge is the Dom Luis I
"The arch enables wide spaces to be crossed by the use of the minimum of materials, thus relieving weight which would otherwise put an intolerable burden on the structure" (Kamm, n.d., para 6).
However, before doing this we had to look more into depth on the materials we will use to construct our bridge. We also have to consider the possible environmental and geological factors that should be taken into consideration for our model. Pertaining to environmental and geological factors, there are many stipulations that structural engineers take into consideration before the construction of a truss bridge begins. The main objective of the geotechnical engineers are to protect the lives of others and avoid property damage from happening which can be caused by various geological conditions. Geological engineering uses principles of soil and rock mechanics to find surface conditions and materials.The Geotechnical engineers complete works such as: geological hazard assessments, material properties, landslide and slope stability, erosion, flooding, dewatering, and seismic investigations. These engineers closely examine all of these important factors before constructing a bridge in a certain location. According to Teach Engineering.com, constructing a safe and efficient bridge requires an ample amount of time and energy. Environmental and geological factors play a major role in construction, as
I’d never really built a bridge that was supposed to be tested and I definitely lacked experience at building in general. Also, I thought that even though I had a really stable desing, m y execution might’ve not been able to make the bridge hold its own. So I eventually scrapped the idea of making an arch. The next best thing was the Warren Truss bridge. The Warren Truss bridge is a type of bridge design that consists of equilateral triangle trusses. Even though it was really simple, it would be very good for a centered load. The design commonly has a centered vertical piece that prevents the bridge from buckling. When weight is applied to the bridge, the vertical pieces are in tension (as well as the horizontal base piece and inner diagonals) and the diagonals are in compression. While reading about the Warren Truss, I found the Pratt Truss as well. The Pratt Truss mainly used right triangles and worked the same way except it would be better for longer spans. I decided to combine both designs to create my
Just imagine jumping up and down having a great time until you have to go home after breaking your leg in gym class because you fell on the trampoline. How would the gym teacher explain to your parents how you broke your leg. Maybe your parents would take you out of that school and transfer you. Would you want to be torn away from your friends just because of an injury during gym class. I am against the idea of having a trampoline in gym class because kids don’t follow the rules, we wouldn’t have time for it, and it is very dangerous.
They provide significant advantages over currently used flexible risers, with increasing water depth and riser diameter in terms of weight, induced environment loading and cost. However, to ensure the long-term integrity of these risers, it is essential to carry out. Because of the different ranges of conditions imposed degrees of tension, bending and fatigue loading. Thus the integrity of the riser has determined by the output of girth welds to these complex loading conditions. Based on catenary equation has helped to the development to the bridge in the world , steel catenary risers use the same concepts , as well. Used to communicate from the sea bed to surface facilities located at topside and also it is used to allow communication between two floating production platforms, steel catenary risers are most used on TLPs, FPSOs and spars and also in some fixed structures, compliant towers and gravity structures. Even though the curved c riser is able to resisted motion, however , excessive motion might lead to serious