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Research Questions (Level 1= best, 2=middle, 3=So so.) (Sources (https…
Research Questions (Level 1= best, 2=middle, 3=So so.)
How do bridges affect the environment around them? (1)
The damage will lead to less resources and less chances to live. Some species might get extinct.
Animals can fight with each other because of food and will cause deaths
The habit that was there will be damaged badly
How does the enviorment effect the bridge. (1)
Water affects bridges
If a bridge is going to be build standing in water, then it have to be made of rock, not wood because wood can get decompose to stay under water for too long.
Sand affects bridges
If the dirt of that place is too soft, the bridge will be really hard to stay standing, and will slowly sink into the sand and might even collapse causing lots of damage. To counter this the makers of the bridge make experiments to test if the bridge will stand in the area when it is about to be built in.
Key things in bridges? (2)
Some kind of Arch
Golden gate bridge
Upside down Arch
Classic Chinese arch bridge
Under-sided Arch
Tower bridge
Upside down Arch
What are some different type of bridges (2)
Arch Bridges
beam bridges
Short--Span Bridge
beam
bridges
Cantilever bridges
suspension bridges
Sources
https://www.naturebridges.com/five-types-bridges/
Very important:
https://sciencing.com/bridge-designs-strongest-science-projects-7917264.html
https://www.youtube.com/watch?v=NE2VchWrtLM&feature=youtu.be
https://digitalcommons.murraystate.edu/cgi/viewcontent.cgi?referer=https://www.google.com.hk/&httpsredir=1&article=1164&context=postersatthecapitol
https://prezi.com/m/a3iyf_cdsfvx/environmental-effects-of-bridges/
https://www.hindawi.com/journals/ace/2012/493983/
https://www.teachengineering.org/lessons/view/cub_brid_lesson04
https://en.wikipedia.org/wiki/Bridge
https://www.youtube.com/watch?v=egmnkd5khXU
Which bridge design is the strongest?
(2)
In this experiment we have tested which type of truss bridge is the strongest, yet uses the least amount of material. Two of the most used truss bridges are of the Pratt and Howe design. Through our experiment it was found that the bridge design that minimized the maximum compression force was the Howe Bridge.
How do people test bridges? (3)
Then they would have to try if the road on the bridge is flat and if the road will crack when a car is driving at a speed of 120km/h, then the bridge needs to be fixed again.different kinds of cars drive through that bridge and see if it shakes and if it shakes, they would have to check what is the problem and fix it, then they will try it again.
People also make a model first before building the real thing
What are bridges made form different materials (2)
This is the rainbow bridge at the port of Tokyo, many cars run through this bridge. This bridge connects Tokyo to the man-made island Odaiba. It uses concreate and steel
Bridge over Tempe Town Lake, Tempe, AZ. Likely made by stone or concrete.
Lucky Knot Bridge, China, likely made by copper or stainless steel
.
Glass Bridge, China. Likely made by stainless steel and glass
what are the different parts of a bridge (2)
Deck
Abutment
Pile
Pier
Girder
Rail Track
When did the first human made bridge appear (3)
The Arkadiko Bridge used from the 13th century BC in the Peloponnese is the first human made bridge.
The "southern Greece is one of the oldest bridge type that is still in use today.
What is the maximum stress that a bridge can withstand? (world wide) (3)
The Golden Gate Bridge can withstand the largest stress every recorded, even though it can there can't be any exact measurements. It is safe to say it can withstand the greatest stress.
How does each type of bridge stay up and hold loads?
Each type of bridge have some sort of arch ,an arch is a signature of a bridge. All bridges have arch's, the arch holds loads depending on the shape and the material making it.
Truss Bridge is the strongest bridge type that has the strongest structure.
made of wood , and kept up because the tension between the wood. Also it sends the pressure it gets into the earth making it more stable.
We added too much pressure on to the bridge at last it collapsed. But it managed to hold until the pressure was enough to destroy most other bridges.
Leonardo Da Vinci's Bridge
Every block I pushing the next block
made of foam and being balanced by tension and compassion.
The tension of the hand pressing on the bridge, resulted in the compassion being unable to withstand the pressure so it collapsed.
Arch bridge
The bridge broke by a whole, it broke together and it broke slowly
Truss bridge
The truss bridge broke because it was not very stable, if we had more time the truss bridge would have held more pressure.
More distance makes the bridge weaker
It is old school
The beam bridge is made of paper so it is not so stable, it is also one of the first bridge and they are easy to make.
Because paper paper can not hold the amount of pressure we put on it, at last it collapsed.
Beam bridge
The bridge fell under a lot amount of pressure.
It held because it had the string, stuck to the ground by hooks so it had ground support and so using the grounds power it held more pressure then it would have held on it's own.
cable stayed bridge
The cable makes the bridge stay on the bridge
It should have withstand more pressure, if the blue tack could have held the wood more.
Cable stayed bridge
