1. Assume that axial deformation of Member DF is caused mainly by its reaction to external forces on the given truss. Compute this deformation. The cross- sectional area of all the members of the truss is 500 mm^2. Use E = 200 GPa. A 471 100 KN 4.00 B C E 2.00 D 3.00 50 KN G 50 KN F LL 50 KN 4.00 m H 7.00

3m For the truss determine the horizontal displacement of joint B. Assume AE is constant for all members using Virtual Work Method 3m B 3m 1 kN C

Determine the force in member CF of the truss shown. State if the members are in tension or compression.

SITUATION. Consider the space truss shown below: Z Zoom image Determine the force in member AB. B 30% 5 kN 3 m 6 m 4022 3 m x

Properties of the Wide Flange Section: gy ty = 61 mm d = 1,050 mm Igx = 14.734 x10° mm* Igy = 715.918 x106 mm* gx 2a. Determine the location of the centroid of the built-up section measured from the top. 2b. Determine the moment of inertia of the built-up section with respect to the horizontal axis of its centroid. (Hint: Use the concept of transfer of moment of inertia.)

4.37 and 4.39

Use Integration Method

Flexibility Method: Truss Solve the following problem: Problem 3: Given: The following truss: The area of all bars, A = 5 in.? E = 30,000 ksi. 30' 120 kips -20'- 20'- Required: Compute the reactions and all the bar forces for the statically indeterminate truss. Approach: Select [C3] as the redundant (assume it positive to the left) Summarize the bar forces for Primary 0 directly on a sketch of truss Primary 0. A bar force in tension must be shown as a positive quantity with a (T) next to it; a bar force in compression must be shown as a negative quantity with a (C) next to it. Keep the sign. Summarize the bar forces for Primary 1 directly on a sketch of truss Primary 1. Summarize final reactions and bar forces directly on a sketch of the final truss.

URGENT

F DE G Ed+d+d+d+d - d - 15 ** The truss is supported by rollers at A and by a pin-joint at G. Find the force in members CD, LD, and KL. Assume d = If the member is in compression, enter a negative force. 1.68 m, F, 3260 N, F, 5480 N, F, 7740 N, F, 5930 N. %3D %3D Enter FCD Answer: Submit All Answers 16. [1 Enter FLD Answer: Submit All Answers 17. Enter F KL Answer: B,