Hotel Design

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  • Room size Circular Hallway Shear walls Footprint
  • Hotel Design

    1. 2. <ul><li>The purpose of this project was to design a new hotel building using “green technology”. </li></ul><ul><li>Location of the proposed building is Manchester, NH </li></ul><ul><li>Three main aspects to the project: slab, beams and columns </li></ul>
    2. 3. <ul><li>Design of N/S floor joist system </li></ul><ul><li>The ground floor has no suites. </li></ul><ul><li>Each floor has 24 standard rooms and 2 luxury suites. </li></ul><ul><li>Top floor will consist of luxury rooms only </li></ul><ul><li>Total of 11 floors, including the ground floor. </li></ul><ul><li>Staircases are found at opposite corners of the northern and southern walls. </li></ul>
    3. 5. N E
    4. 6. Unfactored Loads psf Snow loads 50 psf Occupancy Load 40 psf Floor Live Load 20 psf Roof Dead Load 80 psf
    5. 8. <ul><li>Moments from ACI 8.3.3 </li></ul><ul><li>Moments From Visual Analysis </li></ul>
    6. 9. <ul><li>Shear Steel Diagrams </li></ul>
    7. 10. <ul><li>Shear Steel Diagrams </li></ul>
    8. 11. <ul><li>Shear Steel </li></ul><ul><ul><li>Shear steel only needed in the first 6 ft of the end spans (shown previously) </li></ul></ul><ul><ul><li>#4 stirrups used Gr60 </li></ul></ul><ul><ul><li>3 in spacing </li></ul></ul><ul><li>Tension Steel </li></ul><ul><ul><li>#7 bars used in joists Gr60 </li></ul></ul><ul><li>Total Deflection = 0.48 in </li></ul><ul><li>Allowable Deflection = 0.97 in (Table 9.5b) </li></ul>
    9. 12. <ul><li>Final Design </li></ul><ul><ul><li>24” x 12” </li></ul></ul><ul><ul><li>4.5 ksi Concrete </li></ul></ul><ul><ul><li>2 #10 bars, 3” from bottom </li></ul></ul><ul><ul><li>3 #10 bars, 3” from top </li></ul></ul>
    10. 13. <ul><li>Initial Sizing </li></ul><ul><li>Estimated Moments </li></ul><ul><ul><li>Max Positive: 227 ft-k </li></ul></ul><ul><ul><li>Max Negative: -318 ft-k </li></ul></ul><ul><li>Matrix Analysis </li></ul><ul><ul><li>Max Positive: 226 ft-k </li></ul></ul><ul><ul><li>Max Negative: -355 ft-k </li></ul></ul><ul><li>Moment Capacity </li></ul>Accurate Moments 227 ft-k -318 ft-k Estimated Moments 226 ft-k -355 ft-k
    11. 14. <ul><li>Shear Check </li></ul><ul><li>Stirrup Spacing </li></ul>
    12. 15. <ul><li>Deflection Check </li></ul><ul><ul><li>Matrix Analysis </li></ul></ul><ul><ul><li>Creep </li></ul></ul><ul><ul><li>Total Deflection: 0.676 in </li></ul></ul><ul><ul><li>Allowable Deflection: 0.688 in </li></ul></ul>
    13. 16. Number of Floors 11 E/W Column Spacing (ft) 27.5 N/S Column Spacing (ft) 20 Clear Length of Column 14 b x h (in) 14 x 14 Steel 5 # 11’s @ Gr60 Columns Area (ft2) 1.36 Tributary Area for LL (ft2) 548.6 Tributary Area for DL (ft2) 550
    14. 17. Mn (ft-kips) Pn (kips) 42 982 42 635 5 982 5 635 Floors Column 1-4 14 in x 14 in @ 8 ksi 5-6 14 in x 14 in @ 6 ksi 7-11 12 in x 12 in @ 6 ksi
    15. 20. Approximate Cost of Structure Unit Costs for Reinforcing Steel and Various Concrete Strengths Joists Beams Shear Walls Columns Totals Steel $328000 $52200 $39500 $46500 $466200 Concrete $549000 $35800 $171000 $23600 $779400 Totals $877000 $88000 $210500 $70100 $1245600 concrete steel Item 4000 psi 5000 psi 8000 psi 9000 psi ($/cy) ($/cy) ($/cy) ($/cy) ($/cwt) Unit Cost 101.00 106.04 121.2 126.0 43.37
    16. 21. <ul><li>Designed a floor plan </li></ul><ul><li>N/S Joist System </li></ul><ul><ul><li>Joists </li></ul></ul><ul><ul><li>Beams </li></ul></ul><ul><ul><li>Columns </li></ul></ul><ul><li>Preliminary Costing </li></ul><ul><ul><li>$1.3 million </li></ul></ul>

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