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A10 - axes is the same 16.62 A compression chord of a small...

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CIV 207 – Winter 2009 Assignment #10 Friday, March 20 th Complete the first three questions. Submit your work to Box #5 on the 4 th floor of the MacDonald building by 12 noon on Tuesday March 31 st . No late submissions will be accepted. The second set of three questions are for practice only. Groups of up to 3 members are permitted. Clearly print your names and student numbers on your submission. Ensure that the submission is properly stapled. 16.36 The aluminum column shown has a rectangular cross section and supports an axial load of P. The base of the column is fixed. The support at the top allows rotation of the column in the x-y plane (i.e., bending about the strong axis) but prevents rotation in the x-z plane (i.e., bending about the weak axis). (a) Determine the critical buckling load of the column for the following parameters: L = 50 in., b = 0.50 in., h = 0.875 in., and E = 10,000 ksi. (b) Determine the ratio b/h for which the critical buckling load about both the strong and weak
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Unformatted text preview: axes is the same. 16.62 A compression chord of a small truss consists of two L127 × 76 × 12.7 steel angles arranged with long legs back-to-back as shown. The angles are separated at intervals by spacer blocks. (a) Determine the spacer thickness required so that the moments of inertia for the section about the two principal axes are equal. (b) For a compression chord with an effective length of KL = 7 m, determine the allowable axial load P allow that may be supported by the column using the spacer thickness determined in part (a). Use the AISC equations and assume E = 200 GPa and σ Y = 340 MPa. 16.68 A 6061-T6 aluminum-alloy rectangular tube shape has the dimensions shown. The rectangular tube is used as a compression member that is 2.5-m long. Both ends of the compression member are fixed. Determine the allowable axial load P allow that may be supported by the rectangular tube. Use the Aluminum Association column design formulas. For practice 16.18 16.39 16.75...
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