Office Building-G
EASTERN UNITED STATES
Carl Hubben – Structural Option
Ae senior thesis - 2011
Outline
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Project Information
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Project Information
Owner Restrictions:
Occupancy Type:
Square Footage:
Project Cost:
Number of Stories:
Project details cannot be disclosed
Mixed use office
649,641 sf
$70,000,000
14 levels of office space
4 levels of parking below grade
Office Building-G
Eastern United States
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Project Information
Existing Structure
• Foundation
• Superstructure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Existing Structure
Carl Hubben
Structural Option
Office Building-G
Eastern United States
Foundation
Project Information
Key Points
Existing Structure
• Foundation
• Superstructure
Spread Footings
• Up to 3100 axial kips
Parking garage and superstructure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Perimeter Foundation Wall
Figure 8
Carl Hubben
Structural Option
Project Information
Existing Structure
• Foundation
• Superstructure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Superstructure
Existing Core
Key Points
• Cast in place reinforced concrete
• Post-tensioned girders with 7” thick one-way slab
• Structural depth of 18”
• Exposed round and rectangular columns
• 10” thick shear wall core
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Project Goals
Carl Hubben
Structural Option
Project Goals
Project Information
Existing Structure
•
Column Free Space
Project Goals
•
Remove Shear Wall Core
•
Maintain Floor to Floor Height
•
Determine Architectural Impacts
Structural Depth
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Structural Depth
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Loads
Wind:
Seismic:
Flexible Structure
Reduced Dead Load
New Lateral System
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Floor System
Floor Slab
Composite metal decking
• 4 ½” total thickness
Framing Plan
Composite and Composite Castellated Beams
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Floor System
Castellated Beam Design
Spans range between 45’ – 65’
Vierendeel Bending
• Primary and secondary forces
Primary Forces
Secondary Forces
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Floor System
Existing Design
Redesign
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Columns
General
12 Lateral Columns
23 Gravity Columns
Located on the façade or around vertical transportation
~40’ between columns on exterior
W14 Sizes
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Lateral System
North Elevation
General
Concentrically Braced
8 Chevron Frames
Span 2 floors
V and inverted V design
Symmetrical Design
Carl Hubben
Structural Option
Office Building-G
Eastern United States
Lateral System
Yellow Brace
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Green Brace
Design
HSS14X14 Braces:
1/2
5/16
Load Combination: 1.2D + 0.5L + 0.5Lr + 1.0E
Beam Size:
W27X161
3/8
5/16
1/2
3/8
1/2
5/16
5/8
1/2
1/2
1/2
5/8
5/8
Overstrength and redundancy factor: Ωo = 2.0, ρ = 1.0
Beam Size:
W27X94
Top Floor Deflection: H/400, 5.2” < 5.3”
Inherent Torsion: CM-CR = 6.7’
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
• Loads
• Floor System
• Columns
• Lateral System
• Connections
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Connections
Limit States
Brace Limit States:
• Tension Yielding
• Tension Rupture
Brace/Gusset Limit States:
• Weld Rupture
• Base Metal Strength
• Brace
• Gusset
Gusset Limit States:
• Tension Yielding
• Tension Rupture
• Local Buckling
Gusset/Beam Limit States:
• Weld Rupture
• Base Metal Strength
• Gusset
• Beam
Beam Limit States:
• Web Tension Yielding
• Web Crippling
• Web Buckling
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Architectural Breadth
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Architecture Breadth
Floor Section
Plan View
Exterior
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Conclusions
Carl Hubben
Structural Option
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Office Building-G
Eastern United States
Conclusions
Goals:
Disadvantages:
•
Column Free Space
More Coordination
•
Remove Shear Wall Core
Increased Cost
•
Maintain Floor to Floor Height
Foundation Impacts
•
Determine Architectural Impacts
Carl Hubben
Structural Option
Acknowledgements
Turner Construction Company:
Project Information
Existing Structure
Project Goals
Structural Depth
Architectural Breadth
Conclusions
Carlos Flores
Ryan-Biggs Associates:
Chris Latreille
The Pennsylvania State University:
Dr. Ali Memari
Dr. Linda Hanagan
Dr. Louis Geschwindner
Robert Holland
Kevin Parfitt
I would also like to give a special thanks to my friends and family
for their help and support throughout the year.
Office Building-G
Eastern United States
Carl Hubben
Structural Option
Questions
Office Building-G
Eastern United States
Yellow Brace
Green Brace
HSS14X14 Braces:
Beam Size:
W27X161
1/2
5/16
3/8
5/16
1/2
3/8
1/2
5/16
5/8
1/2
1/2
1/2
5/8
5/8
Beam Size:
W27X94
Brace Limit States:
Tension Yielding
Tension Rupture
Brace/Gusset Limit States:
Weld Rupture
Base Metal Strength
Brace
Gusset
Gusset Limit States
Tension Yielding
Tension Rupture
Local Buckling
Gusset/Beam Limit States
Weld Rupture
Base Metal Strength
Gusset
Beam
Beam
Web Tension Yielding
Web Crippling
Web Buckling
Shear Yielding
Beam/End Plate
Weld Rupture
Base Metal Strength
Beam
End Plate
End Plate Limit States
Gross Shear
Net Shear
Block Shear
Angle Limit States
Prying Effects
Shear Yielding
Shear Rupture
Block Shear
Bolt
Shear
Tension
Bearing and Tear Out
Gusset/Plate
Weld Rupture
Base Metal Strength
Gusset
Plate
Plate
Plate bending
Plate/Column
Weld Rupture
Base Metal Strength
Plate
Column
Column
Local Flange
Yielding
Local Flange
Bending
Local Flange
Crippling