Aspire Tower - Golnesa Zindashti - Middle East...

BS 536STUDIES ON TALL BUILDINGS: DESIGN CONSIDERATIONS

Spring 2011-2012

Case Study: Aspire Towerby

Golnesa Karimizindashti

Submitted to: Assoc.Prof.Dr. Mehmet Halis GünelAssoc.Prof.Dr. Ali Murat Tanyer

Arch. H.Emre Ilg n (MSc.)

MIDDLE EAST TECHNICAL UNIVERSITYDEPARTMENT OF ARCHITECTURE / BUILDING SCIENCE PROGRAM

METUe S

esa

Submitted to: Assoc.Poc.Prof.

BS536GN CONSIDERATIO

2011-2012

Aspire Tower

zinda

PROGRAMThe Aspire Tower

(Sports City Tower)

The Aspire Tower(www.thetorhdoha.com)ME

536General Information

Name: Aspire Tower(Sports City Tower)

Location: Doha, QatarUsage: Hotel/ OfficeHeight (to tip): 300 mFloors: 36Status: CompletedConstruction Start: January, 2005Construction End: May, 2007Structural Material: CompositeStructural System: Mega CoreClient: State of QatarArchitect: Arep with Hadi SimaanStructural Engineer: ArupGeneral Contractor: BESIX with MIDMAC [1]

The Aspire Tower(www.skyscrapercenter.com)

1. www.skyscrapercenter.com2. 2. ARUP Journal 02.07

Features

#1 tallest in Qatar[1]

#16 tallest in Middle East[1]

Centerpiece structure for the15th Asian Games[2]

21 months allocated to design and build[2]

Sport City Complex(www.skyscrapercenter.com)

The Aspire Tower(Sports City Tower)

Case Study: Aspire Tower by Golnesa KarimizindashtiSubmitted to: Günel, Tanyer, Ilg n – Spring 2012

METUrt: Jan

EEnd: y, 20Eal Material: Com

MEl System: M Core

MEClien ate of QatarMArchitect Arep with HMructural EngineeMeral ntrMBS536

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BS# tallest in Q#1# tallestCeC

General Information

Name: Aspire Tower(Sports City Tower)

Location: Doha, QatarUsage: Hotel/ OfficeHeight (to tip): 300 mFloors: 36Status: CompletedConstruction Start: January, 2005Construction End: May, 2007Structural Material: CompositeStructural System: Mega CoreClient: State of QatarArchitect: Arep with Hadi SimaanStructural Engineer: ArupGeneral Contractor: BESIX with MIDMAC [1]

The Aspire Tower(www.skyscrapercenter.com)

1. www.skyscrapercenter.com2. 2. ARUP Journal 02.07

Features

#1 tallest in Qatar[1]

#16 tallest in Middle East[1]

Centerpiece structure for the15th Asian Games[2]

21 months allocated to design and build[2]

Sport City Complex(www.skyscrapercenter.com)

The Aspire Tower(Sports City Tower)

Case Study: Aspire Tower by Golnesa KarimizindashtiSubmitted to: Günel, Tanyer, Ilg n – Spring 2012

METUrt: Jan

EEnd: y, 20Eal Material: Com

MEl System: M Core

MEClien ate of QatarMArchitect Arep with HMructural EngineeMeral ntrMBS536

eaturesF

BS# tallest in Q#1# tallestCeC

Developed by theQatarian architect Hadi SimaanRepresenting a giant torch

holding its symbolic flameduring the games[1]

Architectural Concept

The symbolic tower(www.weavingideas.com)

1. ARUP Journal 02.07

Building Usage

• Functioning as a support forthe Asian Games flame

• Including a 17 story hotel• 3 story health club with a

cantilevered swimming pool• 4 story presidential apartment• 3 story sports museum• 3 story revolving restaurant• 2 story viewing deck[1]

Different Parts(www.arep.fr)

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BS536Differen Parts(www.arep.fr)

Structure System

Mega Core[1]

Its features:• Resisting the whole vertical and lateral loads• No need to columns or shear walls in perimeter• A column free space between core and

perimeter• Core, fire resistant shaft for lifts and staircases• Rapid Construction (using slip forming)[2]

• Used in +40 story towers[1]

1."Yuksek Binalar Tasiyici Sistemler ve Aerodinamik Form“, by Günel, M. Halis & Ilg n, H. Emre2. "Steel Structures: Practical Design Studies“, by MacGinley, Thomas Joseoh

a)Cantilevered out from the core (with no columns).b) Shaping modules combined with perimeter

columns (may not exist all over the building) andfloor support brackets. [1]

Presenting 2 general composition

Mega core system(Drawn by Golnesa Karimi)METU ormi

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a) Core

• At base;Exterior diameter: 18mInterior diameter: 14mThickness: 2m[1]

The diameter and thickness varythrough the height

1. ARUP Journal 02.07

At 20.25m,the thickness

reduces to 1.8m.

From89.55m to 118.55m,

the diameterreduces to 11m.

At 160m,the thickness

reduces to 1m.

A concrete frame transfers the vertical and lateralloads to top of the concrete core, at 238m.[1]

Core detail(Drawn by Golnesa Karimi)

Top of the core(www.arep.fr)

• At top;Exterior diameter: 13mInterior diameter: 11mThickness: 1m[1]

METU p.fr)

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a) Steel Frame

• Consisting of 4 modules cantileveredfrom the core

• Modules consist of:Steel columnsMetal deckingConcrete slabsOuter tension and compression ring beamsRadially spanned primarily steel beams

• Supported by steel cantilever brackets[1] [2]

At the bottom of each module, there are steelcantilever brackets.

1. ARUP Journal 02.072. Arch. Record Journal 08.07

Arrangement of braces in Hotel Module(Drawn by Golnesa Karimi)

3 D Axonometric Model(Drawn by Golnesa Karimi)

Supporting bracket and itsposition in the structure

(www.arep.fr)Bracket Positions

(Drawn by Golnesa Karimi)METUre st

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Supporting bracket and itsposition in the structur

(www.arep.f

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Construction(By Hadi Simaan)

(www.karsten rau.de)

The cantilevering floors consist ofsteel beams, supporting concreteslabs and metal decking.[1]

1.http://www.constructalia.com

Constructionhttp://www.constructalia.comMETU

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tal decking.[1]

Hotel story: 11.3mHealth club story: 8.6m

Presidential apartment: 6.3Sports museum: 5m

Revolving restaurant: 6.3mViewing deck: 7.9m

Each modulecantilevers out withdifferent lengths.

Details on cantilevered modules(Drawn by Golnesa Karimi)

Typical hotel room(The Arch. Record Journal,08.2007)

Typical hotel story's beam arrangement(Drawn by Golnesa Karimi)

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6Module 3 Sports Museum

(Drawn by Golnesea Karimi)

Module 2&4 Pres. Apart. & Restaurant(Drawn by Golnesea Karimi)

Module 1 Health Club(Drawn by Golnesea Karimi)

Viewing Deck(Drawn by Golnesea Karimi)

) BS536Module 3

(Dr

An extra support system were used within the partitionwalls, in the hotel accommodation block; a system oftrusses between levels 5 10.Additional wall bracing was needed under thecantilevered swimming pool in levels 10 and 11, in orderto deal with greater loads at these locations. [1]

Additional bracing arrangement(Drawn by Golnesa Karimi)

1. ARUP Journal 02.07

Connections to the core

Floor to core connection(ARUP Journal 02.07)

Strut support corbel detail(ARUP Journal 02.07)METU

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c) Foundation

Raft & piles (By Hadi Simaan)

Completed foundation (By Hadi Simaan)

• 77 straight shafted piles with35m length (cast in situ), limited tomaximum 1.2m diameter• 37.3m diameter raft with acentral thickness of 7m and areduced thickness of 4m towardsthe perimeter{1]

1.ARUP Journal 02.072. http://www.weavingideas.com3.Arch. Record Journal, 08.07

• Extreme standards for noise emission andwind loads were required because of thetower’s height and exposed location and theeffectiveness of wire mesh for such projectswas proven by means of various tests in awind tunnel.[2]

• Variable permeability due to sunlight andwind load. Vertical spacing gets wider as itmoves up, adjusting to increasing wind. Andit gets narrower on the south facing side toconform to increased sunlight.[3]

Mesh Cladding

MERaft & piles H

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Mesh cladding(www.skyscrapercenter.com

Horizontal ring trusses with 8.1mdistance and vertical spacingwith individual vertical frameprestressed within them.[1]

Connection between the cladding andthe main building is provided by:• Directly by the structural floors• An arrangement of struts attached to

the floors• In the voids between the

accommodation blocks, by the strutsattached directly to the core. [1][2]

Connection between cladding andbuilding (http://www.constructalia.com)

1. ARUP Journal 02.072. Arch. Record Journal 08.07METU

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Lateral Loads

• A seismic analysis revealed that seismicloading was not the critical load in stabilitydesign, so the design was determined bythe wind loading.

• The predicted displacement at the top ofthe core is 454mm.

• The predicted building accelerations fromwind are not within acceptable limits for0.7% damping.

• As a result of the structural analysis, a TMDwith a mass of 140 t was required to keepthe expected acceleration amplitudeswithin the limits.[1]

1. ARUP Journal 02.07

Location of the TMD(ARUP Journal 02.07)

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Swimming Pool

• Elliptical shaped in plan• Cantilevered about 12m from perimeter• 11m length, 6m width, about 50 m2 area

and 1.5m depth• Supported by a steel truss structure with

4m depth (story height)[1]

1. ARUP Journal 02.07

Pool section (The Arch. Record Journal, 08.2007) Cantilevered swimming pool(http://www.constructalia.com)

METU7) BS536

MES536 References

1. CHIKAHER, Gregoir. & HIRST, John. Aspire Tower, Doha, Qatar. The Arup Journal 02.20072. Lubell, Sam. Sports City Tower, Doha, Qatar, United Arab Emirates. The ArchitecturalRecord Journal 08.20073. http://www.skyscrapercenter.com/4. Haver & Boecker Company. Web Address: http://www.weavingideas.com5. Arep. Web Address: www.aref.fr6. Arup. Web Address: www.arup.com7. Günel, M. Halis & Ilg n, H. Emre. "Yuksek Binalar Tasiyici Sistemler ve AerodinamikForm" Ankara : Middle East Technical University, 2010.8. MacGinley, Thomas Joseoh. "Steel Structures: Practical Design Studies". p178 1799. Nawrotzki, P., "Tuned Mass Systems For The Dynamic Upgrade Of Buildings And OtherStructures", Eleventh East Asia Pacific Conference on Structural Engineering &Construction (EASEC 11), “Building a Sustainable Environment”, November 19 21, 2008,Taipei, TAIWAN

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