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AE Senior Thesis 2004 University of Cincinnati Athletic Center

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  1. AE Senior Thesis 2004University of Cincinnati Athletic Center Structural Redesign of a Perimeter Diagrid Lateral System Brian Genduso Structural Option

  2. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  3. Building Introduction General Information Multi-use 8 stories - 220,000 ft2 $50.7 million Design Architect – Bernard Tschumi Architects Design Engineer – Arup, New York Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  4. Building Introduction Site University of Cincinnati “Varsity Village” – Cincinnati, Ohio Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  5. Building Introduction Architectural Layout Curved perimeter 5-story atrium Partially above existing facilities N Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  6. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  7. Structural System Description Diagrid Triangulated “deep beam” frame Functions as both gravity and lateral system Constructed from steel wide flange shapes Welded or bolted for full rigidity Fully insulated and clad in precast concrete Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  8. Structural System Description V Columns Fabricated from heavy wide-flanges or built-up boxes Rigidly connect to the diagrid and substructure Help transfer lateral load, primarily in North-South direction Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  9. Structural System Description Braced Frames Four types Help carry lateral load from bottom of diagrid to foundation East-West direction only Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  10. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  11. Problem Statement Three main concerns Heavy diagrid Connection intensive Limited views Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  12. Problem Statement Goals Address the three main concerns 1) Reduce structure weight 2) Reduce connection complexity 3) Maximize viewable window space Additionally Increase overall structural efficiency Decrease overall building cost Ensure construction feasibility Minimize interior impact Maintain building shape Maintain floor height Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  13. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  14. Design Philosophy Become an “architect-engineer” Aesthetic quality Practical application Unique yet sensible Alter the look and feel Maintain shape, height, space layout Innovative architecture demands innovative engineering solutions! Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  15. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  16. Redesign Approach Solution Area Concept Solution Area I - Changing the material Solution Area II – Modifying the geometry Solution Area III – Removing it altogether Progressively disruptive! Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  17. Redesign Approach Breadth Areas Daylighting Study Façade will change Attempt to integrate daylighting into new exterior Qualitative assessment Construction Study Erection sequence Material layout planning Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  18. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  19. Structural Redesign Precast concrete Cast-in-place concrete Solution Area I Changing the Material of the Diagrid 5 different materials Steel wide flange Round/rectangular HSS Glulam timber Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  20. Structural Redesign Tabular Results Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  21. Structural Redesign Overall Results Stick with steel wide flanges Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  22. Structural Redesign Two main ways to accomplish this: Solution Area II Modifying the Diagrid Geometry 1) Open up the grid John Hancock Center 2) Adjust configuration Central China Television Tower Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  23. 0 1 2 3 4 5a 5b 5c Structural Redesign Configurations 6 Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  24. Structural Redesign Considerations Structural Efficiency Structural Stability Architectural Impact Floor Framing Impact Material Cost Complexity Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  25. Structural Redesign 2D STAAD Model Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  26. Structural Redesign Tabular Results Observations Varying member length has a substantial impact on structural efficiency. In general, there is a noticeable tradeoff between architectural impact and cost. High system redundancy helps control deflection. Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  27. Structural Redesign Overall Results Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  28. Structural Redesign Conclusion Original Case 6 Stick with the original diagrid configuration! Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  29. Structural Redesign A whole new approach Diagrid is eliminated Move lateral system within the building Curtain wall becomes new building enclosure Development phases Conceptual Design Schematic Design Design Development Construction Documents Solution Area III Removing the Diagrid Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  30. Interior Hat Truss Cantilevers Over Columns Cantilevers Over Girders Level 600 Truss Perimeter Truss Reverse Truss Structural Redesign Conceptual Design Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  31. Structural Redesign Pro-Con Comparison Gravity System Lateral System Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  32. Perimeter Truss Structural Redesign System Selection with Braced Frames Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  33. Top truss chord Rigid insulation Perimeter truss Top truss chord Truss diagonal Lateral brace Pinned connection Precast concrete parapet Fireproofing Supporting roof beam Bottom truss chord Flexible connection Structural Redesign Schematic Design 10 Considerations Floor beam sweep Column spacing Pinned vs. fixed connections Column deformation compatibility Fire resistance Thermal movement Truss height Truss lateral bracing Corrosion Braced frame placement Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  34. Structural Redesign Design Development W14x233 W14x82 W14x53 W14x26 ETABS Model Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  35. Structural Redesign Virtual Work Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  36. Structural Redesign Deflections Failed Failed Questionable Acceptable Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  37. Structural Redesign ConstructionDocuments Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  38. Structural Redesign Structure weight Perimeter Truss reduces structural steel weight by 16% Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  39. Structural Redesign Conclusions Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  40. Structural Redesign The Perimeter Truss and Braced Frame system is an acceptable alternative. Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  41. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  42. Daylighting Benefits Increased worker productivity Potentially lower operating costs Environmentally sound Increased heat gain in winter Challenges Discipline coordination Increased building glare Thermal discomfort Summer heat gain Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  43. Daylighting Considerations Spaces daylighted Window quantity Window geometry Glazing material Window covering Façade material Artificial lighting control Interior finishes Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  44. Daylighting Conclusions Daylighting is an owner/architect decision Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  45. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  46. 5Δ1 5Δ1 Perimeter Truss Compression Columns Tension Columns Δ1 5Δ1+ Δ2 Construction Study Column Deformation Incompatibility Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  47. Construction Study Erection Sequence Bottom up Top Down Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  48. Topic Outline Building Introduction Structural System Description Problem Statement Design Philosophy Redesign Approach Structural Redesign Daylighting Study Construction Study Recommendation 1) 2) 3) 4) 5) 6) 7) 8) 9) Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  49. Recommendation Perimeter Truss is an excellent alternative to the diagrid Lighter Less connections Better window views Minimal impact to existing systems Personal goal accomplished! Unique yet sensible Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center

  50. Thank You Family Friends AE Professors Dr. Linda Hanagan Kevin Parfitt Jonathan Dougherty Ricardo Pittella Michael Tavolaro Industry consultants Picture credits Bernard Tschumi Architects Glaserworks Arup Brian Genduso – AE Senior Thesis 2004 University of Cincinnati Athletic Center