# The physics of bridges essay

If the forces vary at one of the resonant frequencies, things can go wrong. It snaps when very little energy has been absorbed. Stress is produced by forces. Though they are very good they are the most expensive. There are differences in the stability of the system. The simplest form of a beam bridge would if you took a board of any size and placed it over two desk that are closer than the boards length.

Torsion is not a good idea in a bridge. This may be solved if, the thickness of the board is increased or there are supports that are put in. As the speed of waves in structural materials is so high, we are normally not aware.

As a load as applied to an object, that object deforms just the right amount to produce the required opposing force. Suspension bridges are the light and strong and can span distances of 2, to 7, feet, which is far longer than any other type.

Tacoma Narrows bridge is only the most famous example of several collapses. The arch bridge is one of the oldest forms of a bridge. These forces can set the structure vibrating at its resonant frequencies — the ones at which it naturally oscillates.

Most of the weight of the bridge is carried by the cables to the anchorages, which are imbedded in either solid rock or massive The physics of bridges essay blocks. If the gap is to great or too much of a load is added then the board will sag greatly.

If you bend a long rectangular rubber eraser it tends to bend in two different axes. The towers enable the main cables to be draped over long distances. The other is that the arch has substantial thickness, so that even with variation in the load, the line of thrust passes through the voussoirs.

Even worse, more than one resonant frequency could coincide. The ratio of stress to strain is called a modulus — it measures the stiffness of the material. Today they are made of thousands of individual steel wires bound tightly together.

Compression differs from other stresses in producing inherent instability. Worse, still, a small but fairly steady force can produce oscillations because of the interaction of the structure with the air.

A single wire, only 0. What a suspension bridge does it suspends the roadway from huge main cables, which extend from one end of the bridge to the other.

This is extremely important in structures because there are live loads — people walk across upper floors, trains and vehicles go across bridges, and the wind can blow from any direction. Forces also produce acceleration. Though you cannot hang it in the shape of an arch, even if it could be done the slightest disturbance would send it flying.

Some of the earliest cables were made from twisted grass, then in the early 19th century they used iron chains. In a long suspended span, the presence of many heavy vehicles traveling in one direction, with few on the other side, will cause the deck to twist.

A long motorway over pass may support by single columns to reduce the effects on roadways below. Beam bridges are the cheapest type of bridge to make.

Such a change, as a fraction of the original size, is called a strain. The ones that we chose to talk about are beam, arches, and suspension bridges. They can save hours in traveling time each day or connect to pieces of land together. This is an extreme example — in fact the effects of forces are never instantaneous — they always take time to propagate through the medium.

There is a neutral surface where the length remains unchanged. An example would be if you, hung a rope across a gap, and it will return to its original position, after some oscillation.

It is a twisting of the structure. It must then be stiff enough to transmit asymmetrical loads to the abutments without undue torsion. There are different types of bridges, each with a specific purpose. Inside the anchorages, the cables are spread over a large area to evenly distribute the load and to prevent the cables from breaking free.The Physics Of Bridges Essay, Research Paper The Physics of Bridges Bridges are a very important part of everyday life.

They can save hours in traveling time each day or connect to pieces of land together. The everyday man may not appreciate them but they are by engineers and fans of physics. Bridges are perfect examples of physics. Below is an essay on "Physics in Bridges" from Anti Essays, your source for research papers, essays, and term paper examples.

Physics applies to so many things in this world. For our Final we were asked to build a project that has physics behind it. Physics, structural analysis - Analysis of a Bridge's Physical Condition. Reasons of the Failure of Tacoma Narrows Bridge Essay - Thesis: In order to prevent the collapse of the Tacoma Narrows Bridge, all the static and dynamic strains should have been taken into account which would have involved proper consideration of effects of environmental.

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AP Physics Summer Assignment with Dr. Crymes Welcome to AP Physics B! It is a college level physics course that is fun, interesting, and challenging on a level you’ve not yet experienced.

This assignment will review all. Truss Bridge Physics Robin Hoffmeister There is many reason that we need bridges in every day of our life, from sufficient means to pass over a roadway, waterway, railway, or other structure. You don’t even think about them because it takes no effort to get over them and they are just there for your use.

The physics of bridges essay
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