16. The truss carries the loads shown. The support reaction at G is 7500 lbs going up. Draw a FBD to solve for the forces in members EF, FI, IH. S000 Ih 12n Figure 9 Solve for the force in member EF and state if it is in Tension or Compressions Solve for the force in member HI and state if it is in Tension or Compression. „Solve for the force in member FI and state if it is in Tension or Compression

Need only a handwritten solution only (not a typed one).

-5 @ 3m-15m- C F H J K ML boo I A 4@4m=16m B D G E 60 kips A For the truss shown, what is the force in member FG? B what is the force in member BE? + --D

2. Find the force acting in Bar AC,CE & CD of the compound Truss and the reactions at A & F as shown in the below figure. 180 lb 540 lb 10 10 B D 10 A E F 18' RA RF

THE DIAGONAL MEMBERS IN THE CENTER PANELS OF THE TRUSS SHOWN ARE VERY SLENDER AND CAN ACT ONLY IN TENSION; SUCH MEMBERS ARE KNOWN AS COUNTERS. DETERMINE THE FORCE IN MEMBER DE AND IN THE COUNTERS THAT ARE ACTING UNDER THE GIVEN LOADING. (15 PTS) Counters ARA B F 6 ft H C E G 3 kips 6 kips 9 kips -S ft- <8 ft- S ft→|<-S ft-

Problem 3: Determine the force in each member and state if the member is in tension or compression. Also, determine the reactions at supports A and F. Ad Во Da C |--2m-→--2m- E F 800 N 3.75 m 3.75 m 800 N

The pin-connected structure consists of a rigid bar ABCD and two axial members. Bar (1) is bronze [E = 113 GPa] with a cross-sectional area of A₁ = 600 mm2. Bar (2) is an aluminum alloy [E = 77 GPa] with a cross-sectional area of A2 = 300 mm². A concentrated load of P = 56 kN acts on the structure at D. Assume L₁-800 mm., L₂-580 mm., a-570 mm., b=340 mm., and c=1090 mm. Determine: (a) the normal stresses 0₁, 0₂ in both bars (1) and (2). (b) the downward deflection VD of point D on the rigid bar. a 5 Answers: (a) o₁ = (b) VD= i i e L₁ L2 A B C C MPa, 0₂ = mm. i D P MPa

The pin-connected structure consists of a rigid bar ABCD and two axial members. Bar (1) is bronze [E = 92 GPa] with a cross-sectional area of A₁ = 680 mm². Bar (2) is an aluminum alloy [E = 74 GPa] with a cross-sectional area of A₂ = 350 mm². A concentrated load of P = 56 kN acts on the structure at D. Assume L₁=900 mm., L2=600 mm., a=580 mm., b=310 mm., and c=1160 mm. Determine: (a) the normal stresses 01, 02 in both bars (1) and (2). (b) the downward deflection vp of point D on the rigid bar. b Answers: (a) o₁ = (b) VD= i i L₁ L2 (2) B C MPa, 0₂ = mm. i D MPa

A В C 12 kN For the frame and loading shown, determine the components of the forces acting on member DABC at B and D. 0.5 m D E F 6 kN 0.5 m H 0.6 m 0.4 m 0.2 m

Determine the force in members GD of the truss in kN and state if the members are in tension or compression. B 1300 N 1.2 m 13 12 0.9 m 0.9 m F -1.2 m 1.2 m-1.2 m-1.2 m- Note: answer as negative value if the force is in compression and positive if it is in O -1 O 1 O 2 O -2 O -2.5 O 2.5 O 1.7 O -1.7