Pacific Team Winter Quarter Presentation AMaria Zapata, Georgia Tech, Atlanta EAmir Kavousian,...

Pacific TeamWinter Quarter Presentation

A Maria Zapata, Georgia Tech, AtlantaE Amir Kavousian, Stanford U, Stanford

Xin.Zheng Lu, Tsinghua U, Beijing C Karthik Jayachandran, Stanford U, Stanford

Anton Sjöberg, KTH, Stockholm

OwnersHans Verhey & Nick Arenson

Pacific Team AEC Project 2008

SiteSF State University


Wind

Sunlight

.

Sunrise

- Mild temperature whole year round, fog

100 ft

N

VIEWS

Sunset

Site Potential


• Energy Saving• Daylight/Ventilation• Thermal comfort• Views

Weather Data


Driving Ideas San Francisco


• Enlightment > discovery• Science and technology• Learning environments

Pacific TeamProjects Features


• Footprint• Access• Key spaces: Auditorium, atrium

• Roof• Shape• Ventilation/daylight

Project 1: Wave


• Inspired site unique features

WaveLevel 1 -3ft

Elevator/StairsCirculationRestroomClassroomsLounge areaAuditorium

10ft

76

38 32

40

40

76

WaveLevel 2 +8ft

10ft

Elevator/StairsCirculationRestroomClassroomsAdministrationAuditoriumStudent Offices

76

38

76

22

15

WaveLevel 3 +19ft

10ft

Elevator/StairsCirculationRestroomLounge AreaFaculty AreaLarge classrooms

76

50

58

38

WaveCross Section 1


WaveCross Section 2


WaveCross Section 3


WaveAtrium Structure


Wave


Project 2: Hi-Tech


• Technology/innovation • Light• Simple shape

Hi-TechLevel 1 -3ft

•Elevator/Stairs•Circulation•Restroom•Stud Sp/Classroom•Mech. Room•Student Offices•Auditorium

10ft

40

100

30

30

Hi-TechLevel 2 +8ft

10ft

•Elevator/Stairs•Circulation•Restroom•Classroom•Faculty Offices•Student Offices•Lounge Area

45

100

30

30

384638

Hi-TechLevel 3 19ft

•Elevator/Stairs•Circulation•Restroom•Classroom•Faculty Offices•Student Offices•Administration

10ft

45

100

30

30

38

2030 30

Hi-TechCross Section 1


11

Hi-TechCross Section 2


Hi-Tech


LoadingLive Loads


Item Magnitude Unit

Roof (green roof) 80 Psf

Roof (non-green roof) 50 Psf

Class Rooms 40 Psf

Auditorium, Terrace 100 Psf

Office 60 Psf

Roof (flat) 20 Psf

Storage 100 Psf

Corridors 80 Psf

Lobby, Atrium 60 Psf

Loading


Earthquake

•<5km from San Andreas fault

•Seismic Zone: Z=4

•Occupancy Category: 4

•Importance Factor: I=1

•Seismic Source Type: A

•ETABS Spectrum function for UBC 97

Soil

•Soil Bearing Capacity: 3500 psf

•Soil Type: Sd

•Soft Soil Profile

•Liquefaction: YES

Wind

•70 mph wind speed

•Exposure: B

•Interstory Drift: 1” (UBC)

Wave - Steel


Wave - SteelStructural System & Load Path


Composite Floor (3” Steel Deck, 3” Concrete Cover)

EBF in both direction (HSS8x8x1/8)

Cantilever beams (W24x146)

Strip Footing

Columns (W14x162)

Shear Connections

Wave - SteelBraces & Sloped Floors


Sloped Floors

EBF Bays

Rationale for choosing EBF over MRF:1- Lower costs2- Better lateral resisting performance

High possibility of torsion Put more braces in exterior bays.

Wave -SteelColumns First Floor


22’ 18’ 22’4” 15’8” 16’ 21’8”

20’1

1”10

’6’8” 15

’10”

22’1

0”12 ’

25’

Wave - SteelColumns Second Floor


22’ 18’ 22’4” 15’8” 16’ 21’8”

20’1

1”10

’15

’10”

22’1

0”

12’

25’

Wave - SteelColumns Third Floor


22’ 18’ 22’4” 15’8” 16’ 21’8”

20’1

1”10

’15

’10”

22’1

0”12

’25

’

Wave - Concrete


Wave - ConcreteStructural System


Concrete Slab Floor (5” thick)

Shear Walls in both Directions (1’ thick)

Sloped Floors

Sloped Beams

Concrete Columns: 20”x20”

Concrete Beams: 15”x24”

Wave - ConcreteLoad Path


Strip Footing

Two-way concrete slab

Columns

Rationale for choosing shear walls in both directions: 1- High performance2- Savings in the overall amount of concrete due to reduced sizes of other elements (beams and columns)

Wave - ConcreteShear Walls & Columns


20’ 16’ 22’ 16’ 16’ 22’21

’10

’6”

16’

23’

12’

25’

Wave - ConcreteFirst Floor


20’ 16’ 22’ 16’ 16’ 22’

21’

10’6

”16

’23

’12

’25

’

Wave ConcreteSecond Floor


20’ 16’ 22’ 16’ 16’ 22’

21’

10’6

”16

’23

’12

’25

’

Wave ConcreteThird Floor


20’ 16’ 22’ 16’ 16’ 22’

21’

10’6

”16

’23

’12

’25

’

Hi-Tech - SteelLoad Path


3” steel deck; 3” concrete cover

Beams: W24x146Columns: W14x131

Shear Connections

Hi-Tech - SteelFirst Floor


Hi-Tech - SteelSecond Floor


Hi-Tech - SteelThird Floor


Columns in cantilever area sit on beams underneath design special beams

Hi-Tech - Concrete


Hi-Tech - ConcreteStructural System & Load Path

Pacific Team AEC Project 2008Pacific Team AEC Project 2008

Concrete Floor Slab (5” thick)

Concrete Shear Walls in both directions (1’ thick)

Strip Footing

Concrete Columns: 20”x20” RC Sections

Concrete Beams: 15”x24” RC Sections

Hi-Tech - ConcreteColumns & Shear Walls 1st fl.


18’6” 19’ 22’5” 40’

40’

13’8

”

16’4

”

30’

Prestressed Beams (in all stories)

Some beams failed when designed with mild steel; so we decided to prestress those beams.

Hi-Tech - ConcreteColumns & Shear Walls 2nd fl


Hi-Tech - ConcreteColumns & Shear Walls 3rd fl


Foundation Beams


We chose strip footing for all options to decrease concrete usage.(low risk of liquefaction, relatively good soil, relatively low axial forces in columns)

(Dimensions in mm)

MEPTechnology Options


chilled beam

ceiling fan displacement

radiant ceiling

MEPDesign Options


steel

concrete

concrete

steel

LEED Points ChecklistTargeted Credits


LEED for New Construction v2.2

35 Points

LEED Silver

LaborLocal Conditions


• Union Job

• 5 day work weeks

• 8 hr shifts

• 6th day if necessarry

• Holidays – double

• Labor rates- RS Means

Reuse – 2015Strategies


• Concrete from old building.

• Crushed concrete reused as aggregate for concrete floors.

• Glass from old building reused in new building as

• Glassphalt

• Terrazzo concrete

• Glazing

• Reuse of excavated soil on site

• Refer online sources such as http://www.sfenvironment.org/

http://www.sfenvironment.org/

Reuse – 2065Strategies


• Steel and Concrete

• Reusable / Recyclable

• Keep as simple as possible

• Easy to disassemble

• Standardize

• Easier in next building to reuse as is

Site PlanBoth Projects


Site PlanEquipment


Mobile Crane – 200 ft 9 ton

Truck-Mounted Concrete PumpExcavatorRoad Roller

WaveScheduling


Steel schedule

Concrete schedule

Foundation done

Building close-inInteriors done

Foundation done

Building close-in Interiors done

112015

123015

Hi-TechScheduling


Steel schedule

Concrete schedule

Foundation done

Building close-inInteriors done

Foundation done

Building close-in Interiors done

111015

121515

EstimateComparison


3%

20%

7%

30%

40%

Wave- Concrete$ 7,985,000

3%

21%

38%31%

7%

2%

23%

34%33%

8%

Wave- Steel$ 7,692,000

2%

22%

8%

32% 36%

Hi Tech- Steel$ 7,247,000

Hi Tech- Concrete$ 7,314,000

SUBSTRUCTURE

SHELL

INTERIORS

SERVICES

EQUIPMENT & FURNISHINGS

SPECIAL CONSTRUCTION

BUILDING SITEWORK

EstimateComparison


Wave- Steel

• Steel columns and beams, shear walls

• 11,000 sft excavation

• curved walls

• organic atrium

• green roof over auditorium

Wave- Concrete

• shear walls, columns and beams

• 11,000 sft excavation

• curved walls

• organic atrium

• green roof over auditorium

Hi Tech- Steel

• steel frame with braces

• 3820 sft excavation

• sloped walls

• “floating” atrium

• -

Hi Tech- Concrete

• shear walls, columns and braces

• 3820 sft excavation

• sloped walls

• “floating” atrium

• -

Concrete vs. SteelComparison


Steel: •Light weight

• Faster Schedule

• More headroom

• Easier to cantilever

• More common in America

• High Inflation! Low supply.

• Value ?

Concrete:• Safety• Lower insurance! • Relatively easier to source material. • Relatively less inflation• Slower schedule• Less flexible with respect to services

Decision MatrixBoth Projects


Convey Big Idea

Be Sustainable

Enhance User Experience

Be Safe and Constructible

Optimize Construction

…..HIGH LEVEL GOALS…..

Decision Matrix


-3

-2

-1

0

1

2

3

Goal . Be Sustainable

Goal . Enhance User Experience

Goal . Be Safe and Constructible Goal . Convey Big Idea

Goal . Optimize Construction

Wavy Steel

Wavy Concrete

High-Tech Steel

high-Tech Concrete

-3-2-10123




Goal . Optimize Construction-3

-2

-1

0

1

2

3





WAVESTEEL

WAVECONCRETE

-3

-2

-1

0

1

2

3





HI TECHSTEEL

-3

-2

-1

0

1

2

3





HI TECHCONCRETE

COMPARITIVE ANALYSIS

Spider Diagram

Decision MatrixComparative Values


0

50

100

150

200

250

S tu d e n t

Wavy Steel

Wavy Concrete

High-Tech Steel

high-Tech Concrete

HI TECH

WAVESTEEL

WAVECONCRETE

HI-TECHSTEEL

HI-TECHCONCRETE

WAVE

Challenges: Two alternatives ranked very closelyHigh sensitivity to preferences

Next Steps: Incorporate owner’s Preferences

Team ProcessDecision Matrices


• 4#, one for each option:

• Wave Square footprint

• Wave Double-Diamond

• Hi-Tech Square

• Hi-Tech Double-Diamond

• One general for different architectural aspects

Team ProcessWinter Quarter Work Plan


Team ProcessStuff & Actions, Weekly Meetings


Stuff & Actions list

• Instead of To-Do lists

• Stuff are ideas

• Stuff should become Actions after reviewing, doable itemsWeekly Meetings

• Circulating Facilitator and Recorder

• Focused on Decisions

Team ProcessImprovements for Spring Quarter


• Create Gantt chart with Goals

• Create a proper schedule of activities

• More contact with Owners

• Better synchronized work

• Find ways to overcome failing technology

The End

what questions do you have?


MEPStrategy


• Central heating and cooling plant on campus

• Spaces divided into exterior facing and interior zones.

• Maximize natural ventilation

• Leverage thermal mass

• Grouping by Thermal load

: N

: E, W, S

Pacific Team Winter Quarter Presentation AMaria Zapata, Georgia Tech, Atlanta EAmir Kavousian,...

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