Zane Middle School shake table: Difference between revisions

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Abstract

A Shake Table was designed and constructed to imitate earthquake magnitudes to help students at Zane Middle School to better understand seismic activity and allow them to test their own building structures.

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Background

Zane Middle School is a STEAM ( Science, Technology, Engineering, Arts, and Math ) school that believes hands on learning is very important for student success. For several years Engineering 215 students at Humboldt State University have teamed up with Zane's faculty to help them achieve this goal. In Spring 2017, our team was challenged with the construction of a Shake Table that demonstrates shaking of an earthquake. Our Shake Table design specifically allows 7th grade students to learn about the seismic activity in Earth’s crust during an earthquake while also providing a way for them to be creative and test their own building designs.

Problem statement (Objective) and criteria

The objective of our design was to make the most realistic shake table design possible, and satisfy the needs of our client, Zane Middle School. Our client expressed their desire to illustrate the effects of liquefaction of earth during an earthquake and how the earth undergoes a wave motion at these times. Most standard shake tables don’t express this motion so this was one of our challenges. Aside from that, our primary concern was to ensure the device was safe as children would be interacting with it in close proximity.

Below is a table of our criteria and weighted values of importance that our team and client agreed upon:

Description of final project

The name of the final design of the shake table is “ .” This design meets the criteria and uses the Flex Board design combined with the Drill Sergeant’s power mechanism to achieve an efficient shake level that safely tests structures built by the students at Zane Middle School. Most of the materials were obtained from local stores, or donated.

This shake table uses a drill to turn an axle, which translates movement along a metal shaft in order to shake the table top. The top of the table is composed of seven wooden slats, each 21 inches long, three inches wide, that are held together using plastic tubing and epoxy with small compression springs in between each slat as shown in figure 1. The structures that are built by the students will be held to the top of the shake table using straps that are connected to a few of the slats. The top of the table is supported by a total of eight compression springs that are connected to five of the seven wooden slats, three of the slats will have two springs connected to them, but two of the slats will only have one spring, as shown in figure 2. The compression spring that support the tabletop are held in place by a combination of epoxy, setting the end of the spring into the board one-quarter inch, and also compressing the springs one-quarter inch using a wire clamped with aluminum ferrules as shown in figure 2.

The shake table is mounted onto a metal cart that is almost four feet tall, two feet long, and three feet wide, as shown in figure 3. The cart rolls on two regular and two locking casters to prevent movement during testing, but also provides an outlet to power the corded drill that shakes the table top. The cart is big enough to allow the students to watch the structures be tested, and has shelves beneath the shake table to allow for more storage space.

Costs

Use Help:Table_examples#Cost_Table.

Testing Results

Instructions

This is how to maintain. The step by step how to template {{How to}} is most likely best for this part.

Discussion and next steps

Suggestions for future changes

This is where to lay out suggestions for how to make the project function better in the future.

References

See Help:Footnotes for more. Template:Reflist