Question 1

Question 1

Conservation of Energy question 1

The truss above is made from tubular members with a diameter of 50 mm. Calculate the vertical displacement at point C (Δ_C ↓).

The truss above is made from tubular members with a diameter of 50 mm. Calculate the vertical displacement at point C (Δ_C ↓).

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Step 1:
Calculate internal forces in truss members using method of joints

Step 1:
Calculate internal forces in truss members using method of joints

Conservation of Energy solution step 1

Step 2:
Construct table of N, L and N²L for all members

Step 2:
Construct table of N, L and N²L for all members

Conservation of Energy solution step 2

Step 3:
U_e = U_i to calculate Δ_C (↓)

Step 3:
U_e = U_i to calculate Δ_C (↓)

Conservation of Energy solution step 3

Useful formula:

Useful formula:

Conservation of Energy formula

Now that you've mastered this question, you can try Question 2.