problem set #1

# problem set #1 - ◦ and supported by concrete thrust...

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MEM 230 Drexel University Mechanics of Materials Spring 2010 Problem Set # 1 Due: In class, Thursday, April 8 Problems 1 – 4 are scanned from the Beer, Johnston, DeWolf, and Mazurek textbook (BJDM). Always include free body diagrams in your solutions. 1. Problem 1.4. 2. Problem 1.32. 3. Problem 1.42. 4. Problems 1.60 and 1.61 (submit as one problem). 5. A simply-supported beam of length L is subjected to a triangularly distributed load w described by the equation w ( x ) = w o x / L . Determine the reactions in the supports (in terms of w o and L ). 6. A long retaining wall is braced by evenly-spaced wood shores set at an angle of 30
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Unformatted text preview: ◦ and supported by concrete thrust blocks, as shown in part (a) of the Fgure below. ±or analysis purposes, the wall and shores are idealized as shown in part (b) of the Fgure, with the base of the wall and both ends of the shores assumed to be pinned. The pressure of the soil against the wall is assumed to be triangularly distributed, and the resultant force acting on the wall is F = 190 kN. If each shore has a square cross section with dimensions 150 X 150 mm, what is the compressive stress σ c in the shores?...
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