CEE111_Design_Exercise_5 - CEE 111 Design Exercise 5 Winter...

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CEE 111 Design Exercise 5 Winter 2012 Due March 12, 2012 Work Independently!! Reinforced concrete columns normally contain longitudinal steel bars and are designated by the type of lateral bracing provided for these bars. Spiral columns have the bars (and the core concrete) wrapped with a closely-spaced helix or spiral of small-diameter wire (as shown in the figure below). The spiral wire is usually placed so that there is about a 1.5 in covering of concrete (called a shell) around the spiral wire. A spiral-bound reinforced circular concrete column is to be subjected to an axial load of 300K. Design the column shown below for minimum cost subject to the ACI (American Concrete Institute) specifications. b d c 10 ft Spiral steel wire Steel reinforcing bars d 1.5 in d Cross Section
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