Upload
damon-underwood
View
215
Download
0
Embed Size (px)
Citation preview
Pacific University
Architecture Katie Kozarek
Engineering Christian Heimple
Construction Debbie Sit
Apprentice Christina Cho
Owner Peter Demian
School of Engineering – New Construction Design Alternatives
Presentation Outline:
General Project Information & Introduction Discipline Constraints & Goals Alternative 1-4 by Discipline Decision Matrix (Pros/Cons of each Alternative) Team Process – Iteration Examples Team Dynamics Conclusion
CCAA
EE
Pacific Team & Project Information
Engineering School of Pacific University in Oregon
Location: Beautiful valley site near Pacific Ocean “Sunny Pond” of about 3000 sq.ft.
Preservation of existing footprint10,000 sq.ft. per story (3)
60% assignable CCAA
EE
Project Constraints
Total Budget: PV = $4.1 millionStructural System Budget: $330,000Completion Time: 1 year, by September
30, 2012Occupancy for Lab Facility: May 1, 2012Soil Condition: Rippable Rock
Design Considerations:
Rebuild a 3-story building for classroom, lab, office, and auditorium
Design a facility for innovative courses taking a team approach to engineering design
Put forth creative ideas considering: Architectural sense of place Functional use by occupants
Listen to team members knowledge-based notifications to design issues
Topography map Topography map
Oregon coast Site considerations:
•Small community
•Steep topography
•Cliffs
•Sparse highway system
Site map Site map
Small campus
Nearby pond
Overlooking cliff
Site photographsSite photographs
Considerations:
Cliff & Pond
Campus buildingsCampus buildingsNote:
Brick skin & Rectilinear forms
Structural Engineering – Requirements & Conditions
System Requirements Steel or concrete frame Cast-in-place, post-tensioned, or precast concrete
slab
Geometric Requirements Height of structure limited to 30’ Footprint of structure limited to existing
footprints
Pacific University – School of Engineering
Structural Engineering – Load Considerations Live Loads
Terrace, Atrium, Storage, & Stairwells – 100 psf Corridors – 80 psf Auditorium & Lobby – 60 psf Classrooms & Offices – 50 psf Roof – 20 psf
Dead Loads Lightweight concrete floor – 60 psf Metal deck – 5 psf Flooring, ceiling, lights – 12 psf Ductwork – 5 psf Partitions – 20 psf Exterior Cladding – 30 psf
Pacific University – School of Engineering
Structural Engineering – Load Considerations
Seismic Considerations Moderate to high seismic activity; Zone 3 Occupancy category, I = 1.0 Rock subsurface
Wind Considerations Design wind speed, V33 = 85 mph (38m/s)
Pacific University – School of Engineering
Equipment
Track-type Tractor
Ripper
Hydraulic Crane
Site Plan: L-shape
Material LaydownMaterial Storage
Office Trailer
Crane
Temporary Road Access
Main Road Access
Site Main Entrance
Optional Site Entrance
Site Boundary
Site Plan: Double Square
Material LaydownMaterial StorageOffice Trailer
CraneMain Site Entrance
Site Boundary
Optional Site Entrance
Alternative 1 - ArchitectureAlternative 1 - Architecture
Previous drawings restructured by engineer: Architectural redesign in Alternative 2
Alternative 1Alternative 1Previous Section & Elevation
Alternative 1 – Option 1 Structural Proposal
Pacific University – School of Engineering
Steel moment resisting frame Composite concrete/steel deck (t = 4.5”)
Alternative 1 – Option 1 Structural Proposal
First Floor Plan
Pacific University – School of Engineering
Third Floor Plan
Outdoor TerraceLaboratory
Alternative 1 – Option 1 Structural Proposal
Second Floor Structural Plan
Pacific University – School of Engineering
W12x45
W14x61
6x6 tube
Third Floor Structural Plan
Roof StructurePacific University – School of Engineering
Alternative 1 – Option 1 Structural Proposal
Alternative 1 – Option 1 Structural Proposal
Roof Structure
Pacific University – School of Engineering
Alternative 1 – Option 1 Structural Proposal
Roof Structure
Pacific University – School of Engineering
Alternative 1 – Option 2 Structural Proposal
Pacific University – School of Engineering
Cast-in-place concrete frame and two-way concrete slab (t = 6”) Shear walls (t = 10”) Goal: To address cost cost concerns of CM regarding rotunda
Alternative 1 – Option 2 Structural Proposal
Second Floor Plan
Pacific University – School of Engineering
Third Floor Plan
Outdoor TerraceStorage
Alternative 1 – Option 2 Structural Proposal
Second Floor Structural Plan
Pacific University – School of Engineering
Foundation Plan Main columns have 5’x5’ spread
footings Rotunda has 10” drilled piles
10”x15”
10”x10”
Complex connection
Alternative 1 – Option 3 Structural Proposal
Eccentrically braced steel frame Composite steel/concrete deck (t = 4.5”) Goal: To address cost and constructability concerns of previous two
options
Pacific University – School of Engineering
Alternative 1 – Option 3 Structural Proposal
First Floor Plan
Pacific University – School of Engineering
Second Floor Plan
No conflicts with architecture
Alternative 1 – Option 3 Structural Proposal
Third Floor Structural Plan
Pacific University – School of Engineering
W12x45
W14x61
Second Floor Structural Plan
W14x61
Fewer columns than with original concept (A/E/C)
W12x45
Alternative 1 – Option 3 Structural Proposal
Gravity load distribution
Pacific University – School of Engineering
Lateral load distribution
Space frame: Construction Method Excavated cost for sunken auditorium (20,000 cy)
at about $400,000, ~10% of Total Cost Steel SMRF more labor-intensive then braced
frame; Concrete requires CIP
Alternative 1 – Construction Issues
Alternative 1: Option 3 Schedule & Estimate
Total: $3.8 Million
Structural: $420,000
Alternative 2 - PartiAlternative 2 - Parti
Parti:Redevelopment of last year’s idea
How can the design pattern laid above the space be incorporated and brought into the building?
Can circulation systems become the pattern?
Can the pattern be highlighted with structure?
Can the structure reflect the pattern’s form and in turn cause sunshadows to develop in the interior spaces?
Alternative 2 - PlansAlternative 2 - Plans
Initial plans
More Finalized plans
Alternative 2 – Model ViewsAlternative 2 – Model Views
Auditorium space underground
Pattern defined by structure and pathways
Structure filters and captures sunlight
Alternative 2Alternative 2
SectionSection through building bringing truss down through building above stairwells
Question to engineer? Can you make this a load bearing element in your structural considerations?
Alternative 2 – Option 1 Structural Proposal
Eccentrically braced steel frame Composite steel/concrete deck (t = 4.5”) Basement auditorium (steel space frame or concrete dome roof) Goal: To meet architect’s challenge of a radial layout with the structure
integrated into the north building’s radial hallways
Pacific University – School of Engineering
Alternative 2 – Option 1 Structural Proposal
Second Floor Structural Plan
Pacific University – School of Engineering
W12x45
W14x61
First Floor Plan
Laboratory
Alternative 2 – Option 2 Structural Proposal
Special moment resisting steel frame Composite steel/concrete deck (t = 4.5”) Basement auditorium (steel space frame or concrete dome roof
with compression ring) Goal: To eliminate structural conflicts with architecture
Pacific University – School of Engineering
Alternative 2 – Option 2 Structural Proposal
First Floor Plan
Pacific University – School of Engineering
W12x45
W14x61
Second Floor Structural Plan
No conflicts w/architecture
Alternative 2 – Option 3 Structural Proposal
Steel frame with shear walls Composite steel/concrete deck (t = 4.5”) Basement auditorium (steel space frame or concrete dome roof
with compression ring) Goal: To explore a shear wall alternative
Pacific University – School of Engineering
Alternative 2 – Option 3 Structural Proposal
Second Floor Structural Plan
Pacific University – School of Engineering
First Floor Plan
No conflicts w/architecture
Alternative 2 – Option 4 Structural Proposal
North Building – visible braced frames along main corridors South Building – eccentrically braced frames on exterior walls Composite steel/concrete deck (t = 4.5”) Basement auditorium (steel space frame or concrete dome roof) Goal: To integrate functional braced frames into the north building’s
hallways
Pacific University – School of Engineering
Alternative 2 – Option 4 Structural Proposal
Pacific University – School of Engineering
First Floor Plan
W12x45
W14x61
Alternative 2 – Construction Issues
Building is separated into two parts:Cost Consideration for duplication of MEP systems
Connecting the two parts by 3rd floor skywalk: Potential savings: ~20% of total cost
Enclosed or Open Radial hallways: Life-cycle Costs
Constructability issues: Curved Walls & Angled Connections
Milestone 1:Structural System Erected
Milestone 2:Building enclosed
Milestone 3:Project completion
Total: $6.0 Million
Structural: $590,000
MEP: $.2.2 Million
Alternative 2: Schedule & Estimate
Alternative 2: Revised Estimate
MEP: $1.1Million
Structural:$400,000
Total: $4.2 Million
parti sketches
Alternative 3Alternative 3
Organically growing plans and elevations moving out from footprint: representing natural growth of coastal habitat ; provisions for experimental growth
Alternative 3: Puzzle ConceptAlternative 3: Puzzle Concept
Option 1 – First set of plans
Alternative 3: Option 1Alternative 3: Option 1
Second set of plans: Changes include moving auditorium to first and second floor instead of excavation – consequential redesign of some interior spaces
Alternative 3: Elevation
Option 2 involves the L-shaped plan for the site
It is still working with the puzzle concept – showing its versatility
Alternative 3: Option 2
Material selectionMaterial selection3 materials
5 blocksEach block has own material skin
Considered in construction and structural process
Computer block: brick to match surrounding buildings
Administration block : wood
Student block: wood
Auditorium: concrete
Classroom block: concrete
Alternative 3: ModelAlternative 3: ModelSuggestions made to construction manager and engineer: think about how can we think of this design as being constructed in separate functional blocks? Can prefabrication be an option? Classroom block
Computer blockStudent blockFaculty blockAuditorium
PUZZLE PIECE AS INTERCONNECTING BLOCKS
Alternative 3 - Interior examplesAlternative 3 - Interior examples
Isozaki/
Kurokawa
how can elements from puzzle concept enter into interior spaces?
Alternative 3 - Exterior examples
Isozaki/
Kurokawa How can elements of form
create interesting spaces? Can structure be pushed into
stipulating form? Can functional blocks merge
to create a whole?
Alternative 3 – Option 1 Structural Proposal
Pacific University – School of Engineering
Steel frame w/ shear walls (t = 8”) Composite steel/concrete deck (t = 4.5”)
Alternative 3 – Option 1 Structural Proposal
First Floor Plan
Pacific University – School of Engineering
W14x90
W12x65
Second Floor Structural Plan
Instructional Laboratory
Alternative 3 – Option 1 Structural Proposal
Cantilever Details
Pacific University – School of Engineering
Tube Section (6x6)
Tube Section (6x6)
Alternative 3 – Option 2 Structural Proposal
Concrete frame w/ shear walls (t = 8”) C-I-P two-way beam supported slab (t = 5”) Post-tensioned cantilever beams and slab Goal: To explore concrete alternatives
Pacific University – School of Engineering
Alternative 3 – Option 2 Structural Proposal
Second Floor Structural Plan
Pacific University – School of Engineering
Cantilever Details
Alternative 3 – Option 3 Structural Proposal
Eccentrically braced steel frame Composite steel/concrete deck (t = 4.5”) Preferred option for Alternative 2 Goal: A cost and time efficient, constructible alternative
Pacific University – School of Engineering
Alternative 3 – Option 3 Structural Proposal
First Floor Plan
Pacific University – School of Engineering
Moment frames used to integrate structure with architecture
W12x45
W14x61
Alternative 3 – Option 3 Structural Proposal
Second Floor Structural Plan
Pacific University – School of Engineering
Alternative 3
Computer Room & Instructional Lab located on different floors: Construction Sequence
Trailer rental costs $10,000 vs Late move-in penalty $37,500
Pre-cast concrete allows fast erection, yet relatively expensive for small-scale projects
Alternative 3 - Option 3 Schedule & Estimate
Total: $4.0 Million
Structural: $460,000
Alternative 4 - Architecture
CAD model sent by structural engineer…
Alternative 4Breaking down massing to make for more usable interior spaces outside of auditorium
Working on unfolding building to consider spatial issues
Alternative 4
Potential
for new
spaces
Creating circulation
Alternative 4How can “floating column” be replaced to show load transfer?
• Conceptual plan – how can this form fit into the site? – needs to be broken down
Alternative 4 – Option 1 Structural Proposal
60’ Cable-stayed cantilever over ocean-side cliff Composite steel/concrete deck with eccentrically
braced frame
Pacific University – School of Engineering
Alternative 4 – Option 1 Structural Proposal
Structural Concept based on TWA hangar in Philadelphia and American hangar at San Francisco International
Design started with engineer to break out of A > E > C pattern and to overcome prior structural difficulties with previous alternatives
Pacific University – School of Engineering
Alternative 4 – Option 1 Structural Proposal
Cantilevered portion of structure
Pacific University – School of Engineering
Alternative 4 – Option 1 Structural Proposal
Pacific University – School of Engineering
Eccentrically braced steel frame Composite steel/concrete deck (t = 4.5”)
8x8 tube steel hanging columns
Alternative 4 – Option 1 Structural Proposal
Third Floor Plan
Pacific University – School of Engineering
Alternative 4 – Option 2 Structural Proposal
60’ Cable-stayed cantilever over ocean-side cliff Shear walls and post-tensioned slab (t = 5”) Cantilevered portions remain steel Goal: Reduce mast height and reflect architect’s
revisions
Pacific University – School of Engineering
Alternative 4 – Option 3 Structural Proposal
Pacific University – School of Engineering
Northeast shoulder removed to accommodate footprint constraint
Pacific University – School of Engineering
Footprint
2nd Floor Structural Plan
Alternative 4 – Option 3 Structural Proposal
Alternative 4
Structurally very dynamic, yet repetition aids in cutting construction costs
Cable-stayed system requires deep pile foundation 2nd and 3rd floor cantilever hanging over cliff:
require temporary platform for efficient construction of the exterior wall
Design still young; construction input in structure/materials/method can possibly drive cost and schedule down
Alternative 4: Schedule & Estimate
Total: $4.6 Million
Structural: $560,000
Cost Comparisons
Decision Matrix AEC
1
2
3
4
PROS CONS
•Dynamic, radial, curvilinear, sun pattern•Semi-regular bays sizes and layout•Easier to construct (regular layout, little welding)
•Most flexible puzzle piece parti•material-functional block relationships•Braced frames have dual purpose of “backing” cantilevers & lateral load support
•Most dynamic interior spaces (auditorium), sunpatterns, shadowplay•Structure integrated with architecture
•Design speaks to engineering and structure•Extremely interesting structural system•Regular structural patterns – many common components throughout
•Cantilevered walkway over atrium susceptible to vibration and imposes large moments in connecting column•Costly atrium space
•May not challenge engineer•Long cantilevers may be susceptible to vibration problems•No economies of scale with so many materials
•Circulation undeveloped•Very irregular layout resulting in a large number of angled connections •Expensive to construct (curved walls, angled connections)
•No relationship to site or context, lack of spatial variation creating architectural limitations•Exceeds height limit and footprint (under review)•Deep piles require lots of time & money, large overhanging portion
Team Process – Iteration Examples Alternative 1 A->E->C->A->E->C
Predetermined, old architectural drawings redesigned
Alternative 2 A->E->C Developed architecturally but needs more structural and construction advice due to issues of
constructability
Alternative 3 A->E->C->E->A->C Redesign of Alternative 1 E&C advised architect against irregular, oblique layout
Expensive, angled connections A challenges E&C to integrate their systems into the architecture (e.g. exposed structural
system)
Alternative 4 E->A->C->A->E->C Design started with engineer
Team Dynamics INTERACTION WITH OWNER:
Very understanding, sensitive, & informative b/c has engineering
Encouraging of ideas outside original scope
INTERACTION WITH TEAM: Initial lack of conceptual understanding of each
others’ fields and roles Challenge to meet new expectations for next semester
by being informative and understanding of different expectations and considerations in the design process
Challenge to be more communicative and outspoken during the design process
Consideration of Alternative 4 Redesign as Final Solution:
CCAA
EE
Challenging Structural Design Feasible in Time and Cost for
Construction without current considerations for material
Architecturally lacks spatial concept and connection to context
CONCLUSION
Considering a fifth alternative
that can challenge all fields equally
CCAA
EE