What are the issues that need to be considered when building bridges with paper

One of the home science of Fuzhuang Street Central Primary School - the structure of the paper bridge.

Luozhuang Education. 02-18 · Official of Education and Sports Bureau of Luozhuang District, Linyi City.

The virus is outside, the science is at home. Teachers of Fuzhuang Street Central Primary School launched a small experiment of learning science at home, so that the teachers and students of the school can use curiosity and childlike fun to play with science and stay at home.

Experiment name: Structure of a paper bridge.

Today, we are going to design the bridge together and see what kind of structure can be used to increase the load-bearing capacity of the paper bridge.

Experimental materials. Jams, books, staplers, scissors.

Experimental Procedure. Place a piece of cardboard between the two stacks of books, which is a simple paper bridge.

2.Put the scissors and the stapler on the paper bridge in turn and see if they can successfully cross the bridge.

A pair of scissors tried to cross the bridge, but it didn't work!

A stapler tried to cross the bridge, but it also failed!

Combined with the text we have learned before: Zhaozhou Bridge. If you turn a paper bridge into an arch, will you be able to cross the bridge successfully? Let's give it a try!

3. Turn the paper bridge into an arched structure.

This time scissors and staplers stood firmly on the bridge. If you change to a heavier object, can the paper bridge also hold it up? Find the object and try it!

Why is it that the arched paper bridge can withstand the weight of the object? Let's take a look!

The arch structure, also known as the thrust structure, is the only structure of all structures that generates external thrust. It is characterized by splitting the applied pressure into one downward force and two horizontal forces (outward thrust). So the pressure created by the weight that we put directly above the arched paper bridge has been transferred to the books that are placed on both sides.

Science can inspire us and children's wisdom, experiments can bring physical and mental pleasure, science is not mysterious, it is around you and me, let's play science together!

What else can you think of if you're smart? Join them in using their imagination and hands-on action! We look forward to discovering you!

First of all, consider waterproof, fireproof.

The bearing force in the vertical direction should be large.

First, you can use paper, first roll the paper into a thin roll, and roll it tightly. The pressure that this roll can withstand is not very large, and the longer it is, the less pressure it can withstand, and the easier it is to be crushed. However, the tensile force that the rolls can withstand is very large, and the structure is adjusted to turn all these rolls into tensile members.

When it is necessary to be pressurized, cut the paper roll shorter, and use many thin paper rolls to bear the pressure together in this pressure area. The piers can be combined with some triangular crutches.

2. Factors influencing paper-made bridges:

1. The thickness, width and bending resistance of the paper;

2. Resist the pressure of medium and heavy objects with external thrust.

Do you need to use it for your practical classes?

Is it time for the teacher to put heavy objects on your bridge when the time comes?

Tell you. The point is not how complicated the method is used, as long as it is hard enough, you don't need to think about it so much.

Cardboard, make a 2 cm thick rectangular paper bridge, use cardboard to make a lot of supports, and then glue it to stabilize, although it is very simple, but very practical.

As for the shape of the support, you have to experiment to find out.

At that time, there was a person in our class, and all the heavy objects that the teacher had put on the paper bridge were fine. He used the method I said, and there seemed to be many, many cylinders in it.

A4 paper, rolled into an arch. Surely, we've just learned, please.

Cardboard or cardboard or newspaper.

Fold the paper at 1 cm intervals into a corrugated shape, or cut it into a circle and stick it together in a cylindrical shape, so the load capacity is high!!

All of them are made of regular triangular pyramids, and countless triangular pyramids are put together into a bridge pier.

Flexible paper.

Step 1: Prepare a dozen A4 blank papers, so that the dimensions of each part of the bridge can be used for comparison, as shown in the image below.

Step 2: Draw the bridge size diagram on paper in advance, as shown in the figure below.

Step 3, after the size of the bridge and the white paper are ready, roll the white paper into a paper tube, and then cut the paper tube rolled into by Youbu before according to the ingenious design size to the same size as the design drawing, as shown in the figure below, pay attention to paste with glue at this time.

Step 4, after each department of the bridge is cut, glue and special connection method to glue the various parts of the bridge together to form a part of the bridge, and then use the same method to make another part of the construction of the omen, complete the main frame of the bridge, as shown in the following figure.

Step 5: Finally, the various parts of the bridge are glued back together, and the solid bridge here is made of paper, as shown in the figure below.

Extended information: Bridges generally refer to structures erected on rivers, lakes and seas, so that vehicles and pedestrians can pass smoothly, generally composed of superstructure, substructure, bearing and ancillary structures, the superstructure, also known as the bridge span structure, is the main structure to cross obstacles; The substructure comprises abutments, piers and foundations; The bearing is a force transmission device that is arranged at the supporting place of bridge span structure and bridge pier or abutment; Ancillary structures refer to bridgehead laps, tapered slope protection, bank revetments, diversion projects, etc.

The "I Love Invention" column is to encourage the whole people to build a career with wisdom and convey the concept of "invention changes destiny, wisdom creates wealth". It is the first TV program in China to encourage Chinese people to start their own businesses through their own inventions and creations.

Design and production of paper bridges (life hands-on).

In this experimental activity, we want:

1. Adopt the form of group activities to cultivate students' spirit of cooperation and orderly work ability; Through finished product displays, competitions and other activities, students are cultivated to have a sense of both cooperation and competition;

2. In the production process, cultivate the spirit of not being afraid of difficulties, not following old rules, and daring to innovate.

3. Learn the role of science and technology to make and understand the main structure of the bridge, and understand the strength of the material and its geometry through the design and production of the paper bridge.

4. Learn to think independently in the process of various load-bearing experimental research and paper bridge design 5. Cultivate students' ability to cooperate with others in joint research.

6. Through the modeling design of the bridge, improve the skills, techniques and ornamentability of the creative model.

7. Learn simple technical design.

Resources.