A9 - shear force V that can be supported by the box beam...

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CIV 207 – Winter 2009 Assignment #9 Friday, March 13 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 24 th . 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. 9.16 A 5-ft long simply supported wood beam carries a concentrated load P at midspan. The cross- sectional dimensions of the beam are shown. If the allowable shear strength of the wood is 80 psi, determine the maximum load P that may be applied at midspan. Neglect the effects of the beam’s self weight. 9.40 A wooden box beam is fabricated from four boards, which are fastened together with nails, as shown. The nails are installed at a spacing of s = 125 mm, and each nail can provide a resistance of V f = 500 N. In service, the box beam will be installed so that bending occurs about the z axis. Determine the maximum
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Unformatted text preview: shear force V that can be supported by the box beam based on the shear capacity of the nailed connections. 9.51 A W310 60 steel beam (see Appendix B) in an existing structure is to be strengthened by adding a 250 mm wide by 16 mm thick cover plate to its lower flange, as shown. The cover plate is attached to the lower flange by pairs of 24-mm-diameter bolts spaced at intervals of s along the beam span. Bending occurs about the z centroidal axis. (a) If the allowable bolt shear stress is 96 MPa, determine the maximum bolt spacing interval s required to support an internal shear force in the beam of V = 50 kN. (b) If the allowable bending stress is 150 MPa, determine the allowable bending moment for the existing W310 60 shape, the allowable bending moment for the W310 60 with the added cover plate, and the percentage increase in moment capacity that is gained by adding the cover plate. . For practice 9.30 9.37 9.53...
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This note was uploaded on 12/01/2009 for the course CIVE 207 taught by Professor Shao during the Winter '09 term at McGill.

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