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CORE DESIGN

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Defnition O Core

• The central of arterial part of a multistory building that

integrates functions and service needs for established

occupants. Such areas are normally composed of toiletfacilities, elevator banks, janitors’ closet, utilities, mechanical

facilities, smoke shafts and stair.

 

• Core also known as facade envelope is a spatial element for

loadbearing highrise building system.

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Characteristic

• Shape of core

• !umber of cores

• "ocation of cores

•  #rrangement of cores

• $eometry of building as generator of core

form

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Function

• Tying the building together to act as a unit

• To ma%imi&e fle%ibility in layout

•  #s shear wall systems to provide the

necessary lateral stability for the building

• 'esist lateral forces from any direction

• Carries gravity loads

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Elements

• (lectrical ) Telephone

• *iping and risers

• Transportation

• +ans room

• Toilets

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PLACEMENT

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A!anta"es an Disa!anta"es• ff Center 

 -  #dvantages•  #ll window or building perimeter space to be used for

offices• ore fle%ibility in ma%imum depth and arrangement of

spaces

•  #ffords the opportunity of developing small secluded spacein the relatively narrow portion of the floor plan where thecore is closes to the e%terior walls.

 - /isadvantages• *resent some problems of access

• "ess fle%ibility of tenant distribution

• 'emote and thus less convenient to the far sides andcorners of the building

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CENTRAL CORE

• Central -  #dvantages

•  #llows all window all window space to be utili&ed as rental of thebuilding plan will permit offices of verging depths to receive natural

light• (%tremely convenient of access and in some cases may be

e0uidistant for all side• Simplifies area division ) provides good fle%ibility of tenant

distribution in the some way• 1ori&ontal utility runs may also relatively e0uidistant from the core• Combine with a s0uare building plan, bearing e%terior ) core walls,

this location permits a floor plan tree of columns and thus totallyfle%ible for office layout

• /isadvantages• The central interior location limits the depth of offices in the mid

&one of each floor • 2t re0uires an access corridor around its perimeter 

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MATERIAL

• Reinforced concrete

 - large net tension forces e%ist can negate the inherent efficiencyof concrete in compression resistance

 - 3alls become thick

• Concrete - +ireresistance, in particular of lift and piping shafts, is good - (%ecution is efficient - "ateral forces can be transmitted employing the surrounding skeleton - sufficient stiffness 

• Steel - "arge and costly - achieve its lateral stability.

 - necessary core stiffness - relatively rapid assemblage of the prefabricated members. - (nclose space, no e%tra consideration need to be given to fire proofing. - "ack of ductility - 'espect to earth 0uake loading  

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Structure

• Cantilever floor 

• 1anging floor 

• Coreinr.c frame• 4unched hanging floors

• 4unched cantilever floors

• Composite

• Coreinsteel frame

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S#stem

• Coreinframe

• Cantilevercore

• Composite• Corecable

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• CONTIN$E CORE %