LESSON TOPIC/TITLE:

COMPUTER-AIDED DESIGN, COMPUTERIZED SIMULATED LOAD TESTING, CONCEPTS OF LOADING AND BRIDGE DESIGN, DESIGN REVISIONS, COMPUTERIZED MODELING TECHNIQUES.

OBJECTIVE:

STUDENTS WILL DEMONSTRATE UNDERSTANDING OF COMPUTER AIDED DESIGN AND COMPUTER SIMULATED LOAD TESTING THROUGH BUILDING AND TESTING A COMPUTER MODEL OF A BRIDGE. STUDENTS WILL COMPETE TO DESIGN THE CHEAPEST BRIDGE WHICH WITHSTANDS THE TESTING. THE DEFAULT HEIGHT ABOVE THE RIVER IS 0 METERS, AND THERE CAN BE NO CENTER PIER.

WARM-UP:

STUDENTS WILL READ THE LESSON PLAN, ENGINEERING DESIGN PROCESS AND RUBRIC. STUDENTS WILL LOG ON TO WEST POINT BRIDGE BUILDER

ACTIVITIES:

DAY 1

STUDENTS WILL WORK ON THEIR INDIVIDUALLY DESIGNED BRIDGES. STUDENTS WILL CHOOSE THE BEST DESIGN (AND MODIFY IT) WITH THE GOAL OF MAKING THE LEAST EXPENSIVE BRIDGE WHICH WILL STAND COMPUTER SIMULATED LOAD TESTING. BRIDGES WILL BE TESTED BY COMPUTER MODELING.

CLOSING REVIEW:

STUDENTS WILL SUBMIT THEIR DESIGNS TO MR. RUF FOR REVIEW.

GUIDED PRACTICE:

STUDENTS WILL OBSERVE SAMPLE SOLUTIONS BY MR. RUF.

HOMEWORK:

COMPLETE THE SELF-ASSESSMENT.

NOTES: DOWNLOAD THE PROGRAM FOR BRIDGE DESIGN.

INFORMAL/FORMAL ASSESSMENT:

THE SOLUTIONS WILL BE GRADED FOR COMPLIANCE WITH THE GUIDELINES, AND COMPUTER TESTED. DURING THE DEVELOPMENT PHASE MR. RUF WILL ASSIST STUDENTS ONE-ON ONE, AS REQUIRED TO ENSURE UNDERSTANDING OF THE MATERIAL.

MATERIALS: THE BRIDGE DESIGN RULES, SELF ASSESSMENT, RUBRIC AND ENGINEERING DESIGN PROCESS (ATTACHED)

The ENGINEERING DESIGN PROCESS is as follows:

When you design a bridge you should follow this process:

1. Identify the problem.   Your project is to design a truss bridge across a river.

2. Define the problem.  To fully define and understand the problem, you should carefully read the Design Specifications and familiarize with the characteristics of the project site.

3. Develop alternative solutions.  To achieve a high-quality design, you will need to investigate several different site configurations and truss configurations.

4. Analyze and compare alternative solutions.  Optimize each alternative configuration for minimum cost, and then compare the results.

5. Select the best alternative.  Select the alternative that costs the least, while still passing the load test.

6.  Implement the solution.  Finalize your design, and record it by saving it to disk, printing a drawing of it, and printing a copy of the load test results. 

7.  Evaluate the results.  Think about what you learned about the design process and about structural behavior as you designed your bridge.  Then apply these lessons to improve the efficiency and effectiveness of your next design.

Name: ________________________________            Block: ______________

Self-Assessment and Reflection Activity

CADD: Developing a Design Solution

Answer the following questions using complete sentences.

1. What are the steps to the Design Process you learned in this lesson?

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2. What do you feel is the most important engineering concept that you have learned? Why?

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3. How has this lesson changed the way you think about Engineering Design?

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4. What engineering topics or concepts do you would like to learn more about?

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5. How was your design affected by the use of the steps of the design process?

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Rubric: Bridge Competition

Followed Instructions -

Bridge complied with project requirements

For height above the water (0 m),

and length between supports (no pier)                                          1   2   3   4   5

Complete - Included the required items -

Design view, member list, and load results.                                 1   2   3   4   5

Engineering Design Process -

Exhibited understanding of the steps required

for engineering design.                                                                      1   2   3   4   5

Design Performance -

Bridge performed below, at or above the average cost.           1   2   3   4   5

Self Assessment-

Student reached valid and supported conclusions on the

performance of the bridge.                                                             1   2   3   4   5

1. Did not attempt.                                                                         

2. Attempted; met some but not all.

3. Met most minimum standards.                                              

4. Met all minimum standards.

5. Met all, exceeded most standards.