Project description
What are the purposes of the a bridge? ( why do people make bridges instead of of doing something else ? ie ferry, cars that float , etc )
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Added on 10.11.2015 19:47
Design Problem: The project is to design a functioning bridge within the given constraints and specifications using only the materials included in the construction kit. Teams will have to come up with 3 well-documented (neatly drawn and dimensioned) and unique designs, with technical drawings for each; one of which will be built from the construction kit and tested on the last day of class.
Report: Proper research is mandatory in order to prepare a test-worthy bridge. Each team will have to submit ONE GROUP report 4-6 pages in length (not including the title page, bibliography or any included drawings or images). Reports should demonstrate that thorough research has been done for their bridge, and include a detailed illustration of the problem solving process involved with designing and constructing a bridge.
Proper research for this project should consist of at the very minimum 5 resources. Your sources should be from trusted sources and can be from online journals (not websites) or printed material from the library. You MUST have at least TWO source from printed material (USE THE LIBRARY). You should include both in-text citations and a bibliography to show where you have used your resources in your report. When you turn in your report you will also hand in a hard copy of at least one page from each source with the section that you are citing highlighted. Your bibliography should follow the APA format.
Reports should consist of the following in correct APA format (Times New Roman 12 pt font double space and .75 inch margins):
Title Page
Introduction (3/4 page – one page)
Body (four – six pages)
Conclusion (3/4 – one page)
Bibliography
Supplemental Info (such as hand sketches of design concepts, final design drawings, calculations, etc.)
Questions to be answered in the report are;
1- In terms of structure and material, what makes a bridge strong?
2- Are some materials better than others? If so what are the pros and cons of working in different materials? ie cost, corrosion, manufacturability, etc.
3- What are the typical structural components of several different bridge designs?
4- What types of beams, cables, fasteners are used?
5- Does the shape of the final design have any affects on strength? Why?
6- What are the purposes of a bridge? (why do people make bridges instead of doing something else? ie ferry, cars that can float, etc.)
7- What makes for a good bridge? (what are an engineers goals for constructing bridge? ie symmetry, width, cost, etc.
Peer Evaluations: All members will evaluate their other team members performance during the entire phase of this design project. YOU DO NOT EVALUATE YOURSELF..YOU EVALUATE AND SCORE YOUR TEAM MEMBERS. All peer evaluations are to be done on an individual and confidential basis, and no one should see another persons evaluations of the other team members.
The scoring should be clearly thought through, and do not simply put a score of 10 in each box and fill this out in 10 seconds!! This is a significant part of the grade, and is your chance to support those who did very well, and on the flip side, you can let me know about the slackers who do nothing and they will not earn as many points. But be honest, fair, and just.
These peer evaluations will be turned in to the professor on the day of the final when your group turns in your final report while the bridges are being tested. ANY PERSON WHO DOES NOT FILL OUT A PEER EVALUATION WILL RECEIVE A SCORE OF 0 FOR THAT 50 POINTS OF THE PROJECT!!
An electronic copy of the \”Team Member Peer Evaluation\” document is attached at the top of this assignment posting and can be downloaded for your use.
Materials:
The kits to be allotted to each group will consist of:
1 mini hot glue gun
15 mini glue sticks
9-feet of fishing line
(8) 0.25 x 0.25 x 36 balsa wood sticks
(15) 1/8 x 1/8 x 36 balsa wood sticks
100 popsicle sticks (each 3/8 x 4 0.5 )
Design Constraints:
The bridge must stand 5 above the river
The bridge must span a river that is 18 wide (foundation to foundation)
The bridge must be at least 3 in width but no wider than 6.
The bridge must be assembled as a single unit
Only material included in the bridge kits may be used.
Overhead supports may be used for your bridge, but there must be a 2x 5 rectangular opening from top to bottom directly in the middle of your bridge so that the compression tester can fit onto the bridge.
No supports may be utilized that would touch the area in-between the 18 separated foundations (no supports in the water)
Bridge Testing:
Testing for bridges will be done in the lecture hall (TC105) on the last day of class with the use of a compression tester. The bridges will be loaded onto a fixture, fitted with a gauge, and a compression force will bear down on the bridges center until failure (force being applied downward on the bridges center in a 2 deep x 5 wide area) or until a maximum deflection of 1 has been achieved (which will represent complete failure).
Points will be established based on the bridges ability to withstand the designated force to at least 20 lbs (10 points) without deflecting more than a 1inch (10 points), meeting each of the design criteria listed above (30 points total).
Each bridge will be weighed for its total weight of construction. Once the bridge has been tested to determine the amount of force it withstood, a strength to weight ratio will be determined for the construction of the bridge.
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