- Determine The Force In Each Member Of The Loaded Truss All Triangles Are 3 4 5 Enter A Positive Number If The Member I 1 (102.31 KiB) Viewed 13 times
Part 1 Correct We can also see that BI = DI Consider joint I. The Free-Body diagram is shown. All members are assumed to be in tension. BI Use this diagram to find the force in Cl. Use a positive number if in tension, a negative number if in compression. CI Answer: Cl = 0 I kN DI
Part 2 Examine joints F and H in order to find the foces in BH and DF. BH = Correct Answers: DF= We also learn that AH = GH and EF = FG. Hint 0 0 eTextbook and Media kN kN Attempts: 1 of 3 used
Part 3 Consider joint C next. The Free-Body diagram is shown. All members are assumed to be in tension. Use this diagram to find the forces BC and CD. Use a positive number if in tension, a negative number if in compression. BC Correct Answers: BC = CD = 15.6 -15.6 CI 25 KN kN kN CD
Correct Every other joint in the truss has more than two unknowns. Time to switch tactics. Here is a Free-Body diagram for the entire truss. Solve for the reaction NE under the roller at E. Answer: NE= 36.3 19 KN B H C kN 25 KN G 4 panels at 8 m- F 28 KN D E NE
Part 5 Correct Consider joint E next. The Free-Body diagram is shown. All members are assumed to be in tension. Use this diagram to find the forces DE and EF. Use a positive number if in tension, a negative number if in compression. DE= EF Answers: -60.5 EF= 48.4 DE IN KN kN NE E
Consider joint D next. The Free-Body diagram is shown. All members are drawn as if in tension (even those that we know are in compression). Use this diagram to find the forces DI and DG. Use a positive number if in tension, a negative number if in compression. DI Incorrect DI = i DG = CD DG Answers: -34.5 i -1.75 DF 28 KN D kN kN DE