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Final Presentation for CE 331 Introduction to Structural Engineering

Final Presentation for CE 331 Introduction to Structural Engineering. Visit a construction site. Photograph structural components, copy structural drawings. Calculate structural adequacy. Your Assignment for Project 2 was to:. P u. P n. Create an interesting presentation that:.

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Final Presentation for CE 331 Introduction to Structural Engineering

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  1. Final PresentationforCE 331 Introduction to Structural Engineering

  2. Visit a construction site Photograph structural components, copy structural drawings Calculate structural adequacy Your Assignment for Project 2 was to:

  3. Pu Pn Create an interesting presentation that: Describes your structure Summarizes your structural analysis

  4. The following slides are examples.Feel free to use copy and paste any sketches into your own presentation.

  5. Gravity Load Analysis for Sears Tower by Matt Damon and Jennifer Lopez for CE 331, Spring 2007 Project 2

  6. The Sears Tower is a 108-story steel-frame office building in downtown Chicago Illinois. (Original) Owner: Sears & Roebuck Co. Contractor: Morse-Diesel Inc. Structural Engineer: Skidmore, Owings, and Merrill

  7. The Sears Tower is constructed of nine steel “tubes”, each 75 feet across.

  8. Insert several slides using your own photos here.

  9. We analyzed a typical interior column and spread footing. - steel roof deck - bar joist - joist girder - steel tube column - reinforced concrete foundation Elevation View

  10. Roof dead load = 14 psf Section of Roof

  11. Pu f Pn We checked the design of an interior column for axial buckling.

  12. Column live load = 15 psf Interior Column Specified live load = 20 psf

  13. Column live load = 15 psf specified live load = 20 psf tributary area = 525 sf live load reduction factor = 0.75 reduced live load = 15 psf

  14. Factored load to column (Pu) = 30.6k Pu Pu = [ 1.2 (14psf) + 1.6 (15psf) ] (30ft)(25ft) = 30.6k

  15. failure mode: axial buckling grade 50 steel E = 29,000ksi fy = 50ksi slenderness (kLu/r) r = 23.4in k = 1.0 Lu = 10.5ft AISC Table Pn = 44k Column capacity (Pn) = 44k HSS 3x4x3/16

  16. Pu f Pn Design check shows column design is OK

  17. We checked the design of a typical reinforced concrete spread footing for flexure failure.

  18. C T Flexure failure occurs when demand (Mu) exceeds capacity (f Mn). Pu, factored axial force from column location of flexure failure factored soil pressure, qu qu Mu Mn

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