1. Given: two-dimensional truss structure as shown. (All joints are pin joints.) Fixed Point Pin-Joint 12 in. Material: Steel, diameter 1/4 in. Find: (a) Displacements of the nodes. (b) Normal stresses developed in the members. 30 lbs 9 in. 60 lbs Roller support

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2. For the truss shown, if all members are made of 1/4" diameter pipe section. Compute the axial stress of members BC and EF in ksi. P load is in kips. (Refer load P to the other attachment) 0.75 P 60 30 E lo' lo' 0.6P 0.3P

Bronze Figure (a) shows a rigid bar that is supported by a pin at A and two rods, one made of steel and the other of bronze. Neglecting the weight of the bar, compute the stress in cach rod caused by the 50-kN load, using the following data: Steel 2 m 1.0 m A Steel l06 m–10 m--0.8 m- Bronze Arca (mm?) 300 50 kN 600 (a) E (GPa) 200 83

Please answer the problem. Provide a free body diagram. Show the full, complete and clear solution.

Anil

compute the forces in all members and the stresses in the midsection, away from any joint. Refer to the Appendix for the cross-sectional area of the members indicated in the figures. Consider all joints to be pinned.

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PROBLEM 2 Given is a truss structure: Where: Working shear stress for the rivets is 70 MPa • Working bearing stress due to rivets is 140 Mpa Thickness of the member is 5 mm Thickness of the Gusset plate is 6 mm Rivet diameter is 15 mm Determine the no. of rivets to fasten the member BD 50 kN 30 kN B MATHalino.com 5 m 4 m 4 m 4 m 3 m

10. The homogeneous bar ABC that weighs 5000 Ib is supported by a smooth pin at C and a cable that runs from A to B around the frictionless pulley at D. If the diameter of the cable is 0.80 inch, calculate its axial stress. Answer: o = 4.90 ksi 3 ft 5ft