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Embed code for: 大桥
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Group member: Toby Ardlan Joanne Coco Group Name:
Our bridge is based on a river, so we build a bridge that can cross the sea. This bridge can help people to save more time to arrive the other side of the land. Bridge is not a construction but it is a concept, the concept of crossing over large spans of land or huge masses of water, and to connect two far-off points, eventually reducing the distance between them. The bridge provides passage over the obstacle of small caverns, a valley, road, body of water, or other physical obstacle. Designs of bridges vary depending on the nature of the terrain and the function of the bridge and where it is constructed.
There are many different types of bridges. Some are simple bridges that have beams underneath to support the bridge deck like the type used for highway overpasses. This type is usually used for spanning things like roads or small rivers. Other bridges use truss design and can "span" wider roads or rivers or to support heavy loads like trains. Another type of bridge is a suspension bridge. Suspension bridges are used for very long spans. The word "span" means the distance between the supports that hold up the bridge. Most of the bridges that students build for the bridge competition are the truss type because they have a high strength to weight ratio but you can build any type of bridge as long as the bridge conforms to the rules.
Statement of problem:
Our goal of this activity is build a hard bridge that can hold most of disasters. We made this bridge for people cross the sea.
Our bridge need ed balance, that means when we finished it, it must be stand by itself.
Although the rule that teacher gave us are the length of the bridge at least 1m, but we want to make it better, so our bridge at least 1.6m.
The wide of the bridge not less than 30cm.
The depth of bridge not less than 1cm, so the bridge will looks more hard.
The height of the bridge not less than 40 cm.
The product must can hold on the wind, earthquake, sun or shaking.
General idea from Internet
How to build a firm bridge
Identify the engineering principles behind bridge building;
Identify different types of bridge;
Become aware of a process outlining how bridges are designed and built;
Understanding some of the physics important for designing,building and using bridge;
Understanding some of the preliminary events that takes place before construction, and finally:
Draw and build a bridge according to specification using the principles of engineering.
Truss type bridges have a truss on each side and a section in between the trusses called the bridge deck. Deck beams that connect to the bottom cord of each truss support the bridge deck, where the test car drives over the bridge.
Design and Develop
Materials to be used Quantity Price Wood board 2.4m*120cm*1.7cm 1 99 Wood board 2.4m*120cm*5mm 1 90 wooden poles 1.8m*3cm*2cm 5 65 wooden poles 4m*5cm*5cm 1 30 Nails 3cm&4cm 1kg 10 hot melt adhesives 10 10 Wire 10m 5 Electric drill 1 free Total 309
1st day Decide what we will build. 2nd day Draw the brainstorming and buy some materials. 3rd day Draw the brainstorming and buy some materials. 4th day D raw the blueprint. 5 th day W e should make the base of the bridge. 6 th day F ollow the blueprint and used the materials what we can used. 7 th day F ollow the blueprint and used the materials what we can used. 8 th day F ollow the blueprint and used the materials what we can used. 9 th day A lmost down the entire thing and do the first test. 10th day D o the redesign. 11 D o the redesign. 12 D o the redesign. 13 C heck all the thing 14 C heck 15 H and it.
We draw a blueprint that we will follow it.
We bought all the materials that we needed.
We started to build a bridge. (We paint the color first, because there are some materials not coming yet.)
We cut the board to be three parts that can support the pier. And then cut two holes.
50cm 80cm 50cm
We put the wooden poles in the two holes.
We used the hot melt adhesives to stick board and the holes.
We used the Electric drill to drilling the holes on the wood board and the poles.
We used the wires to connect the board that can make the bridge harder.
We made four small piers that can support the big piers.
We almost finished our bridge, but actually it cannot stand straightly, we used some wood to make it harder, but anyway, it is so ugly and no matter what do, it still cannot stand straightly and also that is easy to shake.
T1 T2 T3 1. Measure the dimension of building
180cm*30cm*60cm A ctually it is too long that the height is not similar as the long, the bridge is easy to fall down and that scale is not beautiful. 2. It can withstand environmental forces
W e used wind to punch the bridge, it can stand up but not straight. W e shake the bridge as earthquake, the bridge shake a little as well W e put some heavy thing on the bridge and it can hold on. W e have to make it harder that the bridge is easy to shake, because the force of the tower cannot hole on the bridge. a. Use a fan to imitate wind gusts
It can stand up but not straight. I t can stand up and not shake. I t can stand up and shake a little W e should put some heavy thing under the bridge that can make the bridge harder and heavier. b. . Shake the table gently to imitate an earthquake.
I t will shake as well. A lmost good, it only shakes a little. S haking. W e should make the part where we connect two boards be harder. c. Put some heavy thing on the bridge to imitate the car I t can hold on the heavy thing . I t can hold on the heavy thing and very hard. I t can hold on the heavy thing . T he bridge can hold on a lot of thing.
We decide to use the rest of materials to make a new bridge and this time we corrected some mistakes.
We found we should we should paint the color lastly, at first we cut the board as our road, but we changed our size that is 150cm-long.
40cm 80cm 40cm
We put some little wood between two boards.
We put the wood pole on the bridge, put the base floor under the bridge and add the color.
We almost finished.
150cm*30cm*60cm It is better than first one. 2. It can withstand environmental forces
W e used wind to punch the bridge, it can stand up. W e shake the bridge as earthquake, the bridge shake a little as well W e put some heavy thing on the bridge and it can hold on. This bridge can hold on most of forces. a. Use a fan to imitate wind gusts
It can stand up and straight. I t can stand up and not shake. I t can stand up and shake a little Almost perfect. b. . Shake the table gently to imitate an earthquake.
Perfect A lmost good, it only shakes a little. Perfect Not bad. c. Put some heavy thing on the bridge to imitate the car I t can hold on the heavy thing . I t can hold on the heavy thing and very hard. I t can hold on the heavy thing . T he bridge can hold on a lot of thing.
We put some details on the bridge such as car, peopel and light.
We add some triangle to make the bridge be harder.
ed. 9 th day A lmost down the entire thing and do the first test. 10th day D o the redesign. 11 D o the redesign. 12 D o the redesign. 13 C heck all the thing 14 C heck 15 H and it.
We cut the board to be three parts that can support the pier. And then cu