Kitty Chan UC Berkeley
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![Page 1: Kitty Chan UC Berkeley](https://reader033.fdocuments.net/reader033/viewer/2022052603/568133e4550346895d9ad647/html5/thumbnails/1.jpg)
Kitty ChanUC Berkeley
arc
hite
ct
Chad S. GreenStanford University
Yuning WangStanford University
eng
ine
er
con
tra
cto
r
ow
ner Robert Alvarado
•Mission: To work together as AEC in creating a meaningful space for the users in 2010.
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Site
• The site is at Central University in Los Angeles, California
• University of San Francisco is picked as the reference site.
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Site Layout
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Vision for 2010
• Students and Faculty interfacing with computers in their daily functions in the department.
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Design Alternates
SQUARE
TOWERS
ZIGZAG
SUNDIAL
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Design Review – Construction
•Slanted columns difficult to install;precast members easier
•Masts expensive, difficult to install;expensive to excavate basement
•More connections due to zigzag shape;irregular formwork needed
•Economic design;good constructibility
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Design Review – Engineer
•Torsion issues;long spans; no place to fit shear walls
•Long cantilever;low redundancy;
large point load above auditorium
•Rigid & symmetric;issues with torsion
•Good lateral support;unchallenging design
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Design Review – Architect
•Relates to religion, nature, and spatial
•Good interiors, interaction space
•Interesting exterior, atrium
•Uninteresting exterior, poor circulation
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Preferred Alternate
SUNDIAL
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Exterior View
morning noon afternoon
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Elevation
• Using surrounding context to define the building
• Reading the building from the inside
East Elevation South Elevation
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Basement
• Viewing the Mechanical Room
• Seeing the structure of the auditorium
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Basement (cont’d)
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1st Floor
• Dual Usage– Auditorium– Hallway
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1st Floor (cont’d)
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2nd Floor
• Hallways as telescope
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2nd Floor (cont’d)
Before After
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3rd Floor
• Faculty & Student Offices
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3rd Floor (cont’d)
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Program Requirements
ProgramDesign
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Program Requirements (cont’d)
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Natural Ventilation
• Using the wind for natural ventilation for the building
• Cone serving as a greenhouse on the exterior layer
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Solar Power
• Los Angeles Weather
• Solar Power for Daytime Electrical Use
• Skylights for Natural Lighting
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Interaction with Architectural Program
First Floor
AuditoriumLarge Classroom
Large Classroom
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Interaction with Architectural Program
Second Floor
Small Classroom
Small Classroom
Computer Room
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Interaction with Architectural Program
Office Space
Office Space
Third Floor
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Interaction with Architectural Program
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Iterations – AEC
Beams
Floor Slabs Hanging from Beams
AE
A
C
E
AC
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Iterations – A&C
• Discussion on how HVAC will run through the building
• Location of Utility Floor
– Top vs. Bottom
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Iterations – A&E
Dome Structure Layout Changed to Fit Architectural Program
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Iterations – A&E
Slanted Walls Caused Columns to Be Moved In
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Northridge Earthquake
1994
6.7 magnitude
9,000 injured;51 fatalities
$44 billion in damages(costliest in US history)
29,000 buildings yellow- orred-tagged
Steel SMRF experiencedunexpected cracks
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PHMRF System
BENEFITS:
Faster delivery time
Increased safety
Structure retains value
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Typical Structural Members
•Floor Slabs:8X20 Double Tee50’ max span2” topping
•Beams:24X20 L-Beam24X32 Inverted T-Beam30’ max span
•Columns:12X12 Interior24X24 Exterior/Momentmax M = 525 k-ft
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Computer Analysis
Earthquake Design –Weight of Structure, W = 4100 kBase Shear, V = 472 kStory Shear, Fx = 118 kMax Deflection = 1”
Max M = 572 k-ft Max P = 486 k
Max M = 852 k-ft Max P = 652 k
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Computer Analysis
Earthquake Design –Weight of Structure, W = 4100 kBase Shear, V = 472 kStory Shear, Fx = 118 kMax Deflection = 1”
Max M = 572 k-ft Max P = 486 k
Max M = 852 k-ft Max P = 652 k
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Structural Details
•Steel Reinforcing in Dome Floor Slabs & Elevator Core
Six #14 Bars
18” spacing
Develop. Length = 72”
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Structural Details
Cantilever of Precast Double Tee Slabs
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Structural Details
Span of the Dome Structure
18”20’
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Foundation
•Sandy Soil
•Likely Low Water Table
•Earthquake and Liquefaction
Max Column Axial Load = 486k
Soil Bearing Capacity = 4ksf
Footing Area = 120 sqft
Footing = 11’ X 11’
Max Uplift Force = 118k
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Load Paths
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Construction Cost
• Total Cost– Present Value:
$4,270,936– 2010 Value:
$5,663,944– 3% over budget
• Structural System: $582,959– 72% over budget
0%
20%
40%
60%
80%
100%
Cost Breakdown
Other
Fire Protection
Plumping System
Electrical System
Mechanical System
Sitework
Doors/Frames/Hardware
Thermal MoistureProtection andWaterproofingFinishes andAccousticaltreatmentConcrete -Slabs andGrout
Interior and Ceiling
Exterior and Roofing
Structural
Site Work
Exterior
Structural System
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Construction Schedule
Mon. Sept. 6, 2010Mon. Sept. 6, 2010
Fri. May. 11, 2011Fri. May. 11, 2011
Jan. 31, 2011Jan. 31, 2011
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Resource Usage in Erection
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Construction Equipment
• Terrain Crane, 40 ton• Backhoe Loader, 48 H. P.• Dump Truck, 16 ton• F. E. Loader T. M. 2.5 C.Y.• Truck• Gas Engine Vibrator• Gas Welding Machine
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Construction Sequence
Cone is cast-in-place
Construct cone first
I.
II.
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Cone Construction
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MEP Layout
•Solar Energy system–Saves energy costs during life cycle–Issue of heat loss
•Utility floor–Solves floor height problem–Saves life cycle cost of further expansion–Structural system + Wall: about $280,000
Horizontal Distribution
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Structural System Evaluation
• Largely Precast Concrete– Saving labor– Few shear walls– Shipping cost: approximately $80,000– Lead time: detail shop drawing, pre-casting– Re-stressing cables over life cycle
• Slanted columns in Cone
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Team Interaction
Whiteboard Sketches
NetMeeting Videoconferencing
Discussion Forum
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Team Process
Most iterations triggered by A
C improved on being more vocal early on in design decisions
E and C more reactionary than A
A attempted to design with E and C in mind
Although E and C were able to appreciate the goals of A and integrate well with one another, not yet able to think and design in A’s terms
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Thank You Mentors!!
Thank you to all mentors for their invaluable support and time investment in the PBL program and Central Team 2000!
Robert Alvarado, CM Salter AssocScott Dennis, NBTJohn Hoeppner, Dillingham BuildersRon Hoyle, Pankow BuildersShilin Jiang, KL&AGreg Luth, KL&AChuck Madewell, HabitatBob Tatum, Stanford
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Central University – Los Angeles, CA