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Chagrin Highlands Building One Beechwood, Ohio

This thesis presentation outlines the background information, existing structure, problem statement, proposal, structural redesign, breadth study, and conclusions for the Chagrin Highlands Building One. The proposal includes a cast-in-place concrete structure with post-tensioned beams and girders, concrete shear walls, and concrete columns.

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Chagrin Highlands Building One Beechwood, Ohio

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  1. Chagrin Highlands Building OneBeechwood, Ohio Branden J. Ellenberger - Structural Option Senior Thesis 2004

  2. Chagrin Highlands Building One Thesis Presentation Outline • Background Information • Existing Structure • Problem Statement • Proposal • Structural Redesign • Breadth Study • Conclusions Branden Ellenberger – Structural Option Senior Thesis 2004

  3. Chagrin Highlands Building One Thesis Presentation Outline • Background Information • Existing Structure • Problem Statement • Proposal • Structural Redesign • Breadth Study • Conclusions Branden Ellenberger – Structural Option Senior Thesis 2004

  4. Chagrin Highlands Building One Primary Project Team Owner: General Contractor: Architect: Structural Engineer: MEP Engineer: Landscape/Civil Engineer: The Richard E. Jacobs Group The Whiting-Turner Company Kohn Pederson Fox Associates, PC Gilsanz-Murray-Steficek Cosentini Associates Opus Design Branden Ellenberger – Structural Option Senior Thesis 2004

  5. Chagrin Highlands Building One Building Location Building One is located in the Beechwood East section of the Chagrin Highlands corporate community www.chagrinhighlands.com Branden Ellenberger – Structural Option Senior Thesis 2004

  6. Chagrin Highlands Building One Building Information • 4 story multi-use office building • Single level under building parking garage • $13,600,000 overall cost • Building foot print = ~31,500SF • Total sq. ft. = ~130,000SF • Floor to floor heights: • Parking to Ground floor – 12ft • Ground & Penthouse – 15ft • 2nd, 3rd, & 4th – 13ft Branden Ellenberger – Structural Option Senior Thesis 2004

  7. Chagrin Highlands Building One Architectural Details • Open plan design • Single level of underground parking • Horizontal glass curtain wall defines the contemporary style • 2 story entry lobby atrium • Monolithic stone panels help draw attention to the entrance Branden Ellenberger – Structural Option Senior Thesis 2004

  8. Chagrin Highlands Building One Thesis Presentation Outline • Background Information • Existing Structure • Problem Statement • Proposal • Structural Redesign • Breadth Study • Conclusions Branden Ellenberger – Structural Option Senior Thesis 2004

  9. Chagrin Highlands Building One Existing Structure Substructure • 4000 psi concrete • 5” slab-on-grade • 10” reinforced foundation walls • Exterior columns sit on spread footings • Core columns sit on deeper tied footings Branden Ellenberger – Structural Option Senior Thesis 2004

  10. Chagrin Highlands Building One Structural Background Substructure (con’t) • 40 perimeter spread footings • The core of the building is supported by 3 sets of tied spread footings. • from 6 ½’x6 ½’x20”deep… • to 11’x11’x28”deep Branden Ellenberger – Structural Option Senior Thesis 2004

  11. Chagrin Highlands Building One Structural Background Superstructure • Composite beams • 3”composite decking • 4000psi concrete deck • Steel columns • Typical 40’x40’ Bay Branden Ellenberger – Structural Option Senior Thesis 2004

  12. Chagrin Highlands Building One Structural Background East/West Lateral System • 5 identical laterally braced frames located at column lines 5,6,7,9,&10 North/South Lateral System • 2 identical laterally braced frames located along column lines B & C • Design controlled by Wind in E-W direction • Design controlled by Seismic in N-S direction Branden Ellenberger – Structural Option Senior Thesis 2004

  13. Chagrin Highlands Building One Structural Background Lateral Bracing Locations Branden Ellenberger – Structural Option Senior Thesis 2004

  14. Chagrin Highlands Building One Thesis Presentation Outline • Background Information • Existing Structure • Problem Statement • Proposal • Structural Redesign • Breadth Study • Conclusions Branden Ellenberger – Structural Option Senior Thesis 2004

  15. Chagrin Highlands Building One Problem Statement • Change existing steel structure to concrete • Stay consistent with open plan design • Monitor constructability Branden Ellenberger – Structural Option Senior Thesis 2004

  16. Chagrin Highlands Building One Thesis Presentation Outline • Background Information • Existing Structure • Problem Statement • Proposal • Structural Redesign • Breadth Study • Conclusions Branden Ellenberger – Structural Option Senior Thesis 2004

  17. Chagrin Highlands Building One Proposal • Cast-in-place concrete structure Gravity Loading -Post-tensioned t-beams -Post-tensioned girders -Edge Beams -Concrete columns Lateral Loading -Concrete Shear walls Branden Ellenberger – Structural Option Senior Thesis 2004

  18. Chagrin Highlands Building One Thesis Presentation Outline • Background Information • Existing Structure • Problem Statement • Proposal • Structural Redesign • Breadth Study • Conclusions Branden Ellenberger – Structural Option Senior Thesis 2004

  19. Chagrin Highlands Building One Structural Redesign Post-tensioning Design Criteria **Design based on ACI allowable stress criteria Concrete • Normal weight – 150 pcf • Strength – 5000 psi • Modulus of Elasticity – 4030.5 ksi • Creep factor for deflections for beams/slabs – 2.0 Tensioning Strands • Unbonded or greased strands • Ultimate strength – 270 ksi • ½” strands – 0.153 in^2 Mild Steel • Yield strength – 60 ksi Branden Ellenberger – Structural Option Senior Thesis 2004

  20. Chagrin Highlands Building One Structural Redesign Post-tensioned T-Beam Design Branden Ellenberger – Structural Option Senior Thesis 2004

  21. Chagrin Highlands Building One Structural Redesign Post-tensioned T-Beam Design Branden Ellenberger – Structural Option Senior Thesis 2004

  22. Chagrin Highlands Building One Structural Redesign Post-tensioned T-Beam Design Branden Ellenberger – Structural Option Senior Thesis 2004

  23. Chagrin Highlands Building One Structural Redesign Post-tensioned T-Beam Design Branden Ellenberger – Structural Option Senior Thesis 2004

  24. Chagrin Highlands Building One Structural Redesign Typical Tensioning Strand Drape Branden Ellenberger – Structural Option Senior Thesis 2004

  25. Chagrin Highlands Building One Structural Redesign Post-tensioned Girder Design Branden Ellenberger – Structural Option Senior Thesis 2004

  26. Chagrin Highlands Building One Structural Redesign Post-tensioned Girder Design • Design for worst 3 span conditions • Same depth as beam design for constructability • Use ADAPT to take into account moment transfer Branden Ellenberger – Structural Option Senior Thesis 2004

  27. Chagrin Highlands Building One Structural Redesign Edge Beam Design • 30ft beam span • 20’ tributary width • 6” slab • 303ft-kip moment Reinforcement • 40ft beam span • 10’ tributary width • 5” slab • 276 ft-kip moment 30 ft edge beam 40 ft edge beam Branden Ellenberger – Structural Option Senior Thesis 2004

  28. Chagrin Highlands Building One Structural Redesign Column Design Exterior Column Interior Column Branden Ellenberger – Structural Option Senior Thesis 2004

  29. Chagrin Highlands Building One Structural Redesign Shear Wall Design & Lateral Analysis Branden Ellenberger – Structural Option Senior Thesis 2004

  30. Chagrin Highlands Building One Structural Redesign Lateral Analysis • Seismic forces control the deflection in the N-S direction • Wind controls in the deflection in the E-W direction. Branden Ellenberger – Structural Option Senior Thesis 2004

  31. Chagrin Highlands Building One Structural Redesign Redesigned Structure Plan View Branden Ellenberger – Structural Option Senior Thesis 2004

  32. Chagrin Highlands Building One Thesis Presentation Outline • Background Information • Existing Structure • Problem Statement • Proposal • Structural Redesign • Breadth Study • Conclusions Branden Ellenberger – Structural Option Senior Thesis 2004

  33. Chagrin Highlands Building One Lighting Design • Office plan lighting and ceiling was specified to the tenants Design Assumptions: • 40’ x 40’ Bay • If partitions, they had to be between columns • Lighting designed for no daylight Branden Ellenberger – Structural Option Senior Thesis 2004

  34. Chagrin Highlands Building One Lighting Design • Desired illuminance of 50 foot candles (fc) • 2’x4’ Parabolic, 3-lamp fixtures with 3” louvers (www.columbia-ltg.com) • 10’x10’ lighting grid Total Fixtures: Per 40’x40’ Bay – 16 Per typical Floor – 232 • Modeled in Lighting Designer to yield 69.1 fc Branden Ellenberger – Structural Option Senior Thesis 2004

  35. Chagrin Highlands Building One Construction Management Existing Structure Cost Based on: • W-shape steel beams, girders, and columns • Lateral bracing TS members • Base plates • Shear studs • Steel decking • Concrete deck • WWF Final Cost - $1,900,000 Branden Ellenberger – Structural Option Senior Thesis 2004

  36. Chagrin Highlands Building One Construction Management Redesigned Structure Cost Based on: • Structural concrete • Pre-stressing steel strand weight • Mild steel reinforcing weight • Concrete forms • Shoring • Placing concrete Redesign Cost - $ 1,480,000 Branden Ellenberger – Structural Option Senior Thesis 2004

  37. Chagrin Highlands Building One Construction Management Structural Cost Comparison Existing: $1,900,000 Redesign: $1,480,000 $ 390,000 saved in redesign Branden Ellenberger – Structural Option Senior Thesis 2004

  38. Chagrin Highlands Building One Thesis Presentation Outline • Background Information • Existing Structure • Problem Statement • Proposal • Structural Redesign • Breadth Study • Conclusions Branden Ellenberger – Structural Option Senior Thesis 2004

  39. Chagrin Highlands Building One Conclusions Summary Structure Gravity and Lateral system 20” max floor depth Lighting Direct louvered lighting Construction Management Cost savings of $390,000 Branden Ellenberger – Structural Option Senior Thesis 2004

  40. Chagrin Highlands Building One Recommendation • Post-tensioning design & composite steel framing are used hand in hand with in this span condition to limit the structural depth • Given further construction information I would be able to investigate scheduling more closely to find which system would be better. Branden Ellenberger – Structural Option Senior Thesis 2004

  41. Chagrin Highlands Building One Acknowledgements AE Faculty Professor Parfitt Dr. Hanagan Dr. Boothby Jonathan Dougherty Special Thanks Gilsanz Murray Steficek Adapt Corporation Dr. Andrea Schokker Brian Siverling My AE Friends My Thesis Sponsors Branden Ellenberger – Structural Option Senior Thesis 2004

  42. Chagrin Highlands Building One The End! Any Questions?... Branden Ellenberger – Structural Option Senior Thesis 2004

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