Truss_Analysis_docx (1)

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University of Phoenix *

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123

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Mechanical Engineering

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Dec 6, 2023

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docx

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NAME PERIOD DATE Content 5. TRUSS ANALYSIS Is there any case where a member is not under tension or compression? Objectives Determine if members remain in tension or compression or if they can switch. Materials and Equipment Data collection system Building Better Bridges kit Paperclip Safety Follow regular laboratory safety precautions. Procedure 1. Select Sensor Data in SPARKvue and connect your load cell to your computing device. 2. Select Load Cell Force under Quick Start Experiments. 3. Place all the washers on the hanger. 4. Zero out the sensor. 5. Measure the weight of the hanger and record your data under Diagram 1 under Data Collection. 6. Build the bridge seen in Figure 1. Place three books under joints C and F. The bridge should be high enough that the weights to no touch the table. Figure 1: Bridge Design 7. Replace beam AC with the load cell. 8. Zero out the sensor and start collecting data. 9. Hang the weight from joint D with a paperclip. Record the measured force and indicate tension or compression by drawing an arrow on the member in Diagram 1. 10. Repeat the procedure for each member in the bridge. Record your data in Diagram 1. 11. Hang the weight from joint E using a paperclip. Record the measured force and indicate tension or compression by drawing an arrow on the member in Diagram 2. PASCO 1
5. Truss Analysis | STUDENT HANDOUT 12. Repeat the procedure for each member in the bridge. Record your data in Diagram 2. Data Collection Diagram 1: Weight hung on joint D Diagram 2: Weight hung on joint E Questions and Analysis 1. In which case was the force in one of the vertical beams close to the magnitude of the load? Propose and explanation for this result. 2. Describe a case where the force in a member was approximately zero. Propose an explanation for this result. 3. When moving the load from D to E, which beams remained under tension? 2 PASCO
5. Truss Analysis | STUDENT HANDOUT 4. When moving the load from D to E, which beams remained under compression? 5. When moving the load from D to E, which beams switched between tension and compression? 6. If you were to build this bridge using spaghetti, for which beams would you use thin spaghetti? Thick spaghetti? Explain your reasoning. PASCO 3
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