James C. Renick School of Education
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James C. Renick School of James C. Renick School of Education Education PSU AE Senior Thesis 2006 Mick Leso - Structural North Carolina A&T State University - Greensboro
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James C. Renick School of Education. North Carolina A&T State University - Greensboro. PSU AE Senior Thesis 2006 Mick Leso - Structural. Location Existing Conditions Structural System Research Proposal Structural Depth Cost Analysis Conclusions Questions. Introduction. - PowerPoint PPT Presentation
Transcript of James C. Renick School of Education
James C. Renick School of EducationJames C. Renick School of Education
PSU AE Senior Thesis 2006 Mick Leso - Structural
North Carolina A&T State University - Greensboro
IntroductionIntroductionLocation
Existing Conditions
Structural System
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
Owner North Carolina A&T State University Architect The Freelon Group Structural Stewart Engineering, Inc. MEP RMF Engineering, Inc. LArch Sasaki Associates, Inc. Lighting Light Defines Form
PROJECT TEAM
IntroductionIntroductionLocation
Existing Conditions
Structural System
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
64,000 sq. ft.
Education/Administrative Use
3 Stories Above Grade
Total Height: 48’-2”
Predicted Cost: $14 million
Construction: Summer ’06-Fall ’07
BUILDING STATISTICS
2 Boilers running at 60% 250 Ton, Water-Cooled, Rotary Screw Chiller
(2) 2000 kVA transformers 750 kW Standby Diesel Generator
Existing ConditionsExisting Conditions
Location
Introduction
Structural System
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
ARCHITECTURAL FEATURES
52’-6” Long, 40’ Wide Cantilever 2 Stories w/ Varying Floor-to-Floor Height 13’-4” Pedestrian Clearance
17’
14’-2”
12’-6”
Existing ConditionsExisting Conditions
Location
Introduction
Structural System
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
ARCHITECTURAL FEATURES
Exterior Façades
Norman Brick
Classroom Ribbon Windows
Exposed RivetsConcrete Panels
w/
Slate Panels
Steel Cantilever Truss
Glazed Curtain Wall
Aluminum Mesh Sunscreen Fins
Structural SystemStructural System
AE Senior Thesis ’06 Mick Leso - Structural Option
OVERVIEW
Steel Braced Frame on Shallow Foundation Expansion Joint Seismic Loads Control
South Bldg. North Bldg.
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
WIDE FLANGE CANTILEVER TRUSSES
Preassembled for Speed Construction Splices for Easy Transportation
Splice Locations Splice Locations
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
WIDE FLANGE CANTILEVER TRUSSES
W14x211 & W14x90
Girders
Continuous Span
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
WIDE FLANGE CANTILEVER TRUSSES
Columns
W14x43
Columns Spliced Each Floor Level
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
WIDE FLANGE CANTILEVER TRUSSES
MainColumns
W14x132
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
WIDE FLANGE CANTILEVER TRUSSES
Truss Webs
W14x43
Steel Strong in Tension
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
WIDE FLANGE CANTILEVER TRUSSES
TrussWebs
W14x90
Additional Members in Compression
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
TRUSS CONNECTIONS Braces
– Cap/Base Plates– Stiffener Plates– Gusset Plates– Assorted Angles– # of Bolts Varies
Splices– 88 Bolts (1” Diameter)– 1½” Thick Plates
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
HSS RECTANGULAR TUBE BRACING
6”x6”x½” VerticalChevron Braces
8”x8”x¼” Horizontal TubesBelow Each Floor Slab
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
ADDITIONAL STRUCTURAL ELEMENTS Two 12” Thick Reinforced Concrete Shear Walls
Composite Floor System– 3¼” Lightweight Concrete on 2” Metal Deck– 4” Shear Studs– Typical Beams: W21x44 & W24x55
Shallow Foundation– 3000 psi, Normal Weight Concrete– Range From 1’-6” to 2’-6” Depth
Seven Cylinder-shaped Concrete Caissons– 6’ Diameter, Typically 12’ Deep– Supports Cantilever Columns
Structural SystemStructural System
Location
Introduction
Existing Conditions
Research
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
CANTILEVER STRUCTURE
ResearchResearch
Introduction
Existing Conditions
Structural System
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
CANTILEVERS
Examples– Diving Platforms– Cranes– Cantilever Bridges
• Balance
ResearchResearch
Introduction
Existing Conditions
Structural System
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
FALLINGWATER
Reinforced Concrete Dangerous Deflections Post-Tensioning
ResearchResearch
Introduction
Existing Conditions
Structural System
Proposal
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
CHONGQING PUBLIC LIBRARY
Reinforced Concrete 80’ Wide, 54’ Long
Cantilever Section Concrete Truss System
(dimensions in mm.)
ProposalProposal
Existing Conditions
Structural System
Research
Structural Depth
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
It is reasonable to build? Advantages/Disadvantages? Cost Comparison?
SUPERSTRUCTURE CONSIDERATIONS
Tension Reinforcement
Compression Reinforcement
Balancing Weight
Structural DepthStructural Depth
Structural System
Research
Proposal
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
Four Design Options 25’ Column Spacing Same Floor-Floor
Heights
CONCRETE TRUSS
Structural DepthStructural Depth
Structural System
Research
Proposal
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
Similar to Cantilever Bridgew/ No Tension Members
24”x40” Truss Web Members30”x36” Main Column
24”x24” Girders24”x24” Girders12”x16” Beams12”x12” Columns
CONCRETE TRUSS
Structural DepthStructural Depth
Structural System
Research
Proposal
Cost Analysis
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
EFFECTS ON LATERAL SYSTEM
Concrete Trusses– Act as Lateral Braces– Incredibly Rigid
* Larger Building Weight
Increases Seismic Loads
* Requires Additional Shear
Walls in ⊥ Direction
* Greater Building Weight Means Larger Foundation
Cost AnalysisCost Analysis
Research
Proposal
Structural Depth
Conclusions
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
CONCRETE TRUSS SYSTEM
Values for Greensboro(R.S. Means 2005)
Cost AnalysisCost Analysis
Research
Proposal
Structural Depth
Conclusions
Questions
Values for Greensboro(R.S. Means 2005)
AE Senior Thesis ’06 Mick Leso - Structural Option
COMPARISON
* Total Building Cost:$14,000,000
ConclusionsConclusions
Proposal
Structural Depth
Cost Analysis
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
Steel Braced Frame– Cheaper– Faster, More Precise Construction– Expansion Joint– Use of Composite Floor System
Lighter Superstructure– Seismic Conditions– Smaller Foundation
ConclusionsConclusions
Proposal
Structural Depth
Cost Analysis
Questions
AE Senior Thesis ’06 Mick Leso - Structural Option
Compare Cantilever Designs
Proved Steel Structure is Best
Question the Signature Building
QuestionsQuestions
Structural Depth
Cost Analysis
Conclusions
AE Senior Thesis ’06 Mick Leso - Structural Option
