01-01ChapGere.0004 - 2 ) 1 (28 in.)(256 in. 2 )] 5 15.8 in....

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Problem 1.2-5 The cross section of a concrete pier that is loaded uniformly in compression is shown in the figure. (a) Determine the average compressive stress s c in the concrete if the load is equal to 2500 k. (b) Determine the coordinates x w and y w of the point where the resultant load must act in order to produce uniform normal stress. Solution 1.2-5 Concrete pier in compression 4 CHAPTER 1 Tension, Compression, and Shear O 16 in. 20 in. 48 in. y x 16 in. 16 in. 16 in. x C y 1 2 3 4 U SE THE FOLLOWING AREAS : A 1 5 (48 in.)(20 in.) 5 960 in. 2 A 3 5 (16 in.)(16 in.) 5 256 in. 2 A 5 A 1 1 A 2 1 A 3 1 A 4 5 (960 1 128 1 256 1 128) in. 2 5 1472 in. 2 A 2 5 A 4 5 1 2 (16 in.)(16 in.) 5 128 in. 2 (a) A VERAGE COMPRESSIVE STRESS s c P 5 2500 k (b) C OORDINATES OF CENTROID C (see Chapter 12, Eq. 12-7a) 1 2(25.333 in.)(128 in.
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Unformatted text preview: 2 ) 1 (28 in.)(256 in. 2 )] 5 15.8 in. 5 1 1472 in. 2 [ (10 in.)(960 in. 2 ) x 5 1 A ( x 1 A 1 1 2 x 2 A 2 1 x 3 A 3 ) x 5 x i A i A From symmetry, y 5 1 2 (48 in.) 5 24 in. s c 5 P A 5 2500 k 1472 in. 2 5 1.70 ksi O 16 in. 20 in. 48 in. y x 16 in. 16 in. 16 in. 20 in. Problem 1.2-6 A car weighing 130 kN when fully loaded is pulled slowly up a steep inclined track by a steel cable (see figure). The cable has an effective cross-sectional area of 490 mm 2 , and the angle a of the incline is 30. Calculate the tensile stress s t in the cable. Cable a A-PDF Split DEMO : Purchase from www.A-PDF.com to remove the watermark...
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This note was uploaded on 09/20/2009 for the course COE 3001 taught by Professor Armanios during the Spring '08 term at Georgia Institute of Technology.

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