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Bridges and Tunnels
A bridge is a link between two places, such as over a river, a road or a depression, that caters to pedestrians and/or vehicles. A tunnel is an underground link between two places, often underneath a riverbed, for pedestrians and/or vehicles.
4,393 Questions
A Truss is an important structure type in structural engineering. So what are trusses? A Truss is a triangulated system of members that are structured and connected in a way such that they only incur axial force. These members are considered two-force members as the forces are only applied at either end of the member, resulting in either a compression or tension force. They are commonly used as bridge designs, given their ability to efficiently span long distances. There are also faster ways to compute the truss using a truss calculator which you can get online.
The joints are typically pinned connections, such that no shear or moment forces are transferred from member to member. This is a major, yet commonly misunderstood, the difference between truss and frame structures. A frame member will typically take a combination of shear, axial and bending forces; whereas a truss member will only take axial force. Benefit of a Truss When designed correctly, trusses are an efficient way to span long distances whilst minimizing the amount of material used. This is because the internal loads of the members are induced axially (in the direction of the member) in the form of compression or tension. This means less material can be used, and the system as a whole is more efficient, as the force is distributed among a number of members.
Bridges dont collapse because there are many supportive links below it that hold it up...also for bridges without supports underneath, (usually small bridges) have concreton sold ground holding it up
Was the towar bridge the 1st bridge to be built across the river thames?
It is thought that the Romans were the first to build a bridge over the river Thames hover the first bridge that is on record is the London bridge which was first started in 1176 and was not finished until years later.
Which is the strongest bridge structure - truss cantilever suspension or arch?
The arch is the strongest structure. The reason the others are sometimes used is the span is so long the arch isn't practicle.
Where in US in longest single suspension bridge?
Verrazzano Narrows, Golden Gate, Mackinaw, George Washington, and Tacoma Narrows.is the ancer ok :)
How long is the channel tunnel France to England?
A train takes approximately 25 minutes to go through the Channel Tunnel.
You have two options. You can take a high speed passenger train, or you can take put your car one of the vehicle transporting trains.
The Eurotunnel Shuttle is the brand name for the car carrying trains which run through the Channel Tunnel between Folkestone and Calais.
Eurostar is the brand name of the company running high speed trains London-Paris and London-Lille-Brussels through the Channel Tunnel.
Eurostar uses the stations: St. Pancras (London), Gare du Nord (Paris), Bruxelles Midi (Brussels) and Lille Europe.
Currently these are the only passenger trains operating through the tunnel.
The Eurostar takes 2 hours 15 minutes between London and Paris. There is approximately one train per hour in each direction.
What is the cheapest bridge in the world?
beam bridges are usually the cheapest. The cost usually depends on the size of the bridge and the materials used. Beam bridges usually consist of storng wood and san small gaps, therfore being the cheapest to build. Although they are cheap, they are not the strongest nor the most reliable and can not span large gaps.
How does the longest bridge world build?
The longest bridge in Japan and the world is the Akashi-Kaikyo Bridge, completed in 1998 at a length of 1,991 metres.
How can bridges be built to deal with weather?
They have (overlapping) expansion joints that allows the span to shrink and stretch w/o forming a big gap.
What is the use of triangles in a truss?
There are many similarities of stage trusses, but which one is the most stable?
The most stable and stable structure of a stage truss is a triangular truss. In physics, a triangle is the most stable structure, and it also saves the most material. So in some occasions, using a triangular truss is a very wise choice.
The foldable triangular stage truss produced by SHIZHAN Group has a stable and stable truss structure. Compared with trusses of the same specification, it has a greater load capacity and span. The folding triangle truss is a pin interface and has a fast installation speed. The stage truss can be closed when not in use, which can save freight and storage space to the greatest extent. It is a perfect truss in all aspects of the truss.
SHIZHAN Group is China's largest company group of trussed stage barriers. With 15 years of manufacturing experience, a professional engineer design team provides perfect solutions for our projects. If you are interested, welcome to come to consult.
Why are concrete roads laid in sections with a pitch between them?
Because then it has room for moving and shrinking, growing etc
Concrete roads and pavements are laid in sections and a all gap is left between each sections. This is filled either tarmac or rubber compound
What state is the world's largest natural rock bridge located in?
which state has the worlds largest natral rock span
What is the famous bridge in California?
The famous bridge in California is the Golden Gate Bridge. This bridge can be found when you visit San Francisco.
How are truss bridges built to withstand force?
The initial popularity of the truss bridge was based primarily on its simplicity of construction and economics of building the bridges. In the 1800s, wood was cheap and plentiful. Wood was an ideal construction material because it was flexible and elastic to some degree and could withstand the variety of forces that acted against it. The early truss bridges were built from wooden timbers and were constructed in trestle forms where they were composed of a braced framework of timbers, piles or steel beams built to carry roads or railroads over a depression in the landscape topography.
What is the piece at the top of an arch bridge called?
I know that the top stone, is called a Key stone.
How long is the Belle Isle Bridge?
The Belle Isle Bridge or "Macarthur Bridge" as it is also known, spanned the Detroit River and was 2356 feet in total length. It was destroyed in 1915 and only the wooden pilings remain.
Usually bridges are made of steel and/or concrete. Concrete bridges have steel reinforcement embedded within the concrete, because concrete is weak in tension. Steel is strong in tension and compression, which makes suspension bridges practical. Every nut and bolt, steel member size and thickness, and every other component on a bridge has been located and sized by using mathematics to calculate all the forces applied to each component of the bridge, which must be resisted by the materials used.
What is the purpose of bridge rectifier in the circuit?
Its an erection to the extreme purposely used for making love
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