Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Tech-Ed Bridges
| Question | Answer |
|---|---|
| because our ancestors were wanderers, their first construction projects were probably | bridges |
| every bridge ever constructed have the same four stresses to overcome: | tensile stress, compression stress, shear stress, torsion stress |
| forces that twist and bend are | torsion stress |
| forces that push or squeeze material together are | compression stress |
| forces that stretch and pull apart are | tensile stress |
| forces that make materials tear and slide by each other are | shear stress |
| a bridge that blew down in Tacoma, Washington moved around so badly that before it blew down, it was called | "Galloping Gertie" |
| When a Heavy load is put on a bridge, the material on top is? While those on the bottom are acted on by? | compression forces - tension forces |
| In modern bridges the two most often used materials are | steel and concrete |
| steel bridge parts are often in the shape of a box or an "I". These shapes are called | girders |
| concrete is a mixture of | sand, stone, cement, and water |
| concrete has good what properties? but is poor in? | compression - tension |
| Thaddeus Hyatt discovered that what put near the bottom of a concrete beam would give more support for the beam? | steel rods |
| what are the three kinds of bridges? | beam, arch, suspension |
| When rods, wires, or cables are put inside a drying concrete beam and tightened before the concrete dries, the result is known as | pre-stressed concrete |
| when steel beams are laid between two piers or supports, the bridge is known as a | ginder beam bridge |
| when a beam bridge supports a middle beam, the bridge is known as a | cantilever beam bridge |
| when a beam bridge uses a series of triangular shapes to support a beam, the bridge is known as a | truss beam bridge |
| the stone used in the top of a stone arch bridge is known as | keystone |
| bridges that hold the road surface by cables are known as | suspension bridges |
| suspension bridges are usually used over | long distances |
| a bridge that suspends the road surface from only one tower is called a | cable-stayed bridge |
| what is the name of the reinforced tube that is used to build a bridge pier in water? | caisson |
| when designing a bridge, four things must be considered: | terrain, reason, length of span, and weather |
Created by:
tiggerandelise