unit 1 technological process
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Unit 1.- Technological Process
Practical example: BRIDGES
I.E.S. SANTA ROSA DE LIMA
TECNOLOGÍA 2º ESO
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1. Identify the problem or necessity.
2. Search for information.
3. Design and construction.
4. Evaluation of what have been constructed.
Steps of technological process
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Problem: Cross a river from one side to the other side
1.- Identify the problem
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Additional problems:
◦ ¿Is it too deep to cross by feet?
◦ ¿Is there too much water stream or cold temperature to cross swimming?
1.- Identify the problem
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Possible Solutions:
a) A boat or canoe b) A bridge
2.- Search for information
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We look for information about different kind of bridges:
2.- Search for information
Girder bridge
Rope Bridge
Arc bridgeTriangulate
bridge
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We look for information about different kind of bridges:
2.- Search for information
Cable-stayed bridge
Suspension Bridge
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Drawing the plans (CAD tools):
3.- Design and Construction
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Simulation tests (CAE tools):
3.- Design and Construction
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Construction planning:
3.- Design and Construction
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Load tests:
4.- Evaluation
Static test Dynamic Test
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Tacoma Narrows Bridge
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Tacoma Narrows Bridge First design by Clark Eldridge (11$ million).
Another design, by Leon Moisseiff, was chosen, reducing the total cost (8$ million).
Features:
◦ Total length of 1600 metres.
◦ Main span of 853 metres.
◦ The first one built using plate girders.
◦ Collapsed four months after its opening.VIDEO
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Tacoma Narrows Bridge After its collapse, the new Tacoma
Narrows Bridge, built in 1950, replaced plate girders by adding trusses.
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In 2007 it was open to the traffic new Tacoma Narrows Bridge.
Tacoma Narrows Bridge