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Authoritative PPT Summary
"The Power of the Arch" Shape and Structure PPT Download
Part One Content: New Lesson Learning
Test the load-bearing capacity of the paper arch
Observe the shape of the paper arch. This paper arch stretches flat after being compressed, indicating that it cannot bear too much weight.
If the arched foot is pressed against, how much weight can it bear?
It was found that when the paper arch is not pressed against the paper arch, the paper arch will stretch flat after being compressed and cannot bear too much weight; after the arch foot is pressed against it, it can bear a greater weight.
Conclusion: When the arch carries weight, it can transmit the pressure downward and outward to the adjacent parts. The parts of the arch squeeze each other and are more closely combined.
Pressure on the arch will produce an outward pushing force. Against this force, the arch can carry a large amount of weight.
Why won’t the watermelon rind arch collapse?
Because the watermelon skin arch transmits the force downward and outward to the adjacent parts, the various parts of the arch are squeezed against each other and combined more closely. So the watermelon rind arch will not collapse.
The power of the arch PPT, part 2: expansion and extension
The arch is a curved bar structure that generates horizontal thrust at the arch foot under the action of vertical pressure, also called a thrust structure. Arch structure is an important structural form, often used in bridges, aqueducts and house construction.
Arch is a structure that mainly bears pressure. It can be constructed of bricks, stones and concrete with good pressure resistance and low price.
The power of the arch PPT, part 3: Class summary
The arch can transfer the pressure downwards and outwards, so it can withstand a lot of pressure.
Arch Strength PPT, Part 4: Classroom Training
1. Choice
1. Which of the following statements is wrong ( )
A. By pressing the arch against the foot, you can bear the weight of the washer.
B. The deformation caused by the arch can be seen
C. Arch structures are rarely used in some buildings
D. The arched structure is the only structure that generates external thrust among all structures.
2. The following ( ) structures use arch structures
A. Marco Polo Bridge B. Jiangyin Bridge C. Pyramid D. Eiffel Tower
2. Fill in the blanks
1. The characteristic of the arch is to decompose the pressure it receives into ( ) and ( ).
2. Arch structure is an important structural form and is often used in ( ), ( ) and ( ) buildings.
3. When the arch is pressed, it will squeeze downward and to both sides. If it resists ( ), its force toward ( ) will be offset.
The power of the arch PPT, part 5: homework
After class, the students built a melon-skin arch and continued to study the load-bearing capacity of the arch.
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