XÉÄt 101 Eola Drive, Orlando, FL Justin Raducha Structural Option April 15 th , 2008 Senior Thesis
Presentation Outline Building Statistics � Introduction & Building Overview � Building Statistics Location : 101 South Eola Dr. � Existing Structure Overview Orlando, FL � Proposal � Structural Depth Study Architecture: 12 Stories � Structural System Overview Green Glass and White Concrete � Redesign Details � Impacts & Considerations Building Use: Mixed ‐ Use � Construction Management Breadth Study • Retail Stores • 3 Levels of Parking � Site Analysis • 130 Luxury Condominiums � Existing Cost & Schedule � Proposed System Impact Size: 322,810 Square Feet � Comparison � Sustainability Breadth Study Cost: $36.4 Million � LEED Checklist � Research Structure: 100% Precast Concrete Construction � Conclusions & Recommendations
Presentation Outline Existing Structure � Introduction & Building Overview • 100% Precast Concrete Structure � Building Statistics • Building steps back 10 feet on all sides above level 5 � Existing Structure Overview • Central Core houses stair towers and elevator shafts � Proposal � Structural Depth Study • Ground Floor : Slab on Grade � Structural System Overview • Levels 2 ‐ 4: Double Tee Parking Deck supported by Precast Walls (E ‐ W Span) � Redesign Details • Levels 5 ‐ 12: � Impacts & Considerations • 8” Hollowcore Planks with 1” Gyp ‐ Crete Topping � Construction Management Breadth Study • Planks are supported by precast concrete trusses � Site Analysis � Existing Cost & Schedule • Lateral System: � Proposed System Impact • Shear walls are placed around exterior of the structure � Comparison • Shear walls take lateral loading as well as gravity loading from levels 5 ‐ 12 � Sustainability Breadth Study • Concrete trusses span between shear walls and central core � LEED Checklist • Half of lateral load is transferred to opposite shear walls by trusses � Research � Conclusions & Recommendations
Presentation Outline Skip Truss System � Introduction & Building Overview • Similar to staggered truss system � Building Statistics • Each of the 48 trusses carries 2 floors worth of loading � Existing Structure Overview • System allows alternate floors to be column and load ‐ bearing wall free � Proposal � Structural Depth Study • Precast Trusses developed and designed exclusively for this project � Structural System Overview • 45 foot span / 12 feet tall � Redesign Details • Placed within partition walls between condominiums � Impacts & Considerations � Construction Management Breadth Study � Site Analysis � Existing Cost & Schedule � Proposed System Impact � Comparison � Sustainability Breadth Study � LEED Checklist � Research � Conclusions & Recommendations
Presentation Outline Proposal � Introduction & Building Overview Redesign Rationale: � Building Statistics • Each concrete truss weighs in excess of 54,000 pounds � Existing Structure Overview • Concrete is poor in tension – any tensile forces need to be carried by steel reinforcement � Proposal • Trusses needed to be specially designed for the intended purpose � Structural Depth Study • Superimposed loading can be more efficiently carried over the 45 foot span by steel � Structural System Overview � Redesign Details Proposed Changes: � Impacts & Considerations • Redesign of skip truss system utilizing equivalent steel trusses in place of concrete trusses � Construction Management Breadth Study • Reduce overall weight of the system and therefore the structure � Site Analysis • Compare impact of change to the cost and schedule of the project � Existing Cost & Schedule � Proposed System Impact Additional Proposals � Comparison • Evaluate building for applicability and feasibility of Green Building practices � Sustainability Breadth Study • Investigate additions and changes to allow 101 Eola to achieve a LEED Rating � LEED Checklist • Provide for a more sustainable, healthy, and enjoyable environment � Research � Conclusions & Recommendations
Presentation Outline Proposal � Introduction & Building Overview Success Measured By: � Building Statistics � Existing Structure Overview � Proposal Structural Concerns: � Structural Depth Study � Lighter System � Structural System Overview � Thinner Wall Sandwich � Redesign Details � Meet Strength & Serviceability Criteria � Impacts & Considerations � Construction Management Breadth Study Construction Concerns � Site Analysis � Less Expensive System � Existing Cost & Schedule � Proposed System Impact � Shorter Schedule Duration � Comparison � Maintain workable site � Sustainability Breadth Study � LEED Checklist Sustainability Concerns � Research � Provide for a more sustainable, healthy, and enjoyable environment � Conclusions & Recommendations
Presentation Outline Structural System Overview � Introduction & Building Overview Concrete Truss Details: � Building Statistics • 45 foot span � Existing Structure Overview • 13 inch thickness for top (web) section of truss � Proposal • 12 foot height � Structural Depth Study • Constructed of 7000 psi concrete � Structural System Overview • Reinforced with (12) ½” diameter tendons, #11 longitudinal bars, #10 vertical bars, #4 stirrups � Redesign Details • 54.6 kips self weight per truss � Impacts & Considerations � Construction Management Breadth Study Floor Construction: � Site Analysis • 8” Hollowcore Planks � Existing Cost & Schedule • Average Bay Span = 26’ ‐ 7” � Proposed System Impact • 1” Gyp ‐ Crete topping for continuity � Comparison • Planks rest on top chord and bottom chord of truss � Sustainability Breadth Study • Fully grouted through truss to achieve rigid diaphragm action � LEED Checklist � Research � Conclusions & Recommendations
Presentation Outline Truss Redesign � Introduction & Building Overview Materials: � Building Statistics • Chords: Wide Flange W ‐ Shape Members, A992 Steel � Existing Structure Overview • Vertical and Diagonal Web Members: Square HSS Tubing, A500 Grade B Steel � Proposal • Gusset Plates: ½” thick, A36 Steel � Structural Depth Study � Structural System Overview Design: � Redesign Details • Two panel designs were considered: 5 panels & 7 panels � Impacts & Considerations • 5 panel solution chosen from analysis for giving lowest weight to strength ratio � Construction Management Breadth Study � Site Analysis Connections: � Existing Cost & Schedule • Two options were considered: � Proposed System Impact • Slotted HSS to gusset plate connection � Comparison • Direct HSS to W ‐ Shape flange connection � Sustainability Breadth Study • Gusset plate connection chosen per fabricator suggestions � LEED Checklist • Cheaper connection (less labor costs) � Research • Allows for hollowcore planks to rest on flange � Conclusions & Recommendations
Presentation Outline Final Design � Introduction & Building Overview • HSS vertical and diagonal members, W ‐ Shape chords � Building Statistics • Connections are slotted HSS connected to ½” gusset with ¼” fillet weld on either side � Existing Structure Overview � Proposal • Design resulted in a truss weighing 8.55 kips � Structural Depth Study • Resulting deflection of 0.396” is well within the code limit of L/240 (2.25”) � Structural System Overview � Redesign Details • Connected to shear walls in same fashion as concrete trusses – welded plate connection � Impacts & Considerations � Construction Management Breadth Study � Site Analysis � Existing Cost & Schedule � Proposed System Impact � Comparison � Sustainability Breadth Study � LEED Checklist � Research � Conclusions & Recommendations
Presentation Outline Impacts & Considerations � Introduction & Building Overview Foundation Impact � Building Statistics • Lighter System, No redesign required � Existing Structure Overview � Proposal Lateral Force Resisting System � Structural Depth Study • Lighter System � Structural System Overview No Redesign Required • Functions the same as concrete solution � Redesign Details � Impacts & Considerations Fireproofing � Construction Management Breadth Study • 2 hour fire rating required by code � Site Analysis • Achieved using 1” minimum of Spray Applied Fire Resistive Material (SFRM) � Existing Cost & Schedule � Proposed System Impact Wall Width � Comparison • Truss width decreased from 13 inches to 6 inches inside wall � Sustainability Breadth Study • An additional 3.5” of floor space on either side of truss ≈ 26 Square Feet along length � LEED Checklist � Research � Conclusions & Recommendations
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