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Definition Of 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

load-bearing high-rise building system.

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Characteristic

Shape of core

Number of cores

Location of cores Arrangement of cores

Geometry of building as generator of core

form

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PLACEMENT

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CENTRAL CORE

Central Advantages

Allows all window all window space to be utilized as rental of thebuilding plan will permit offices of verging depths to receive naturallight

Extremely convenient of access and in some cases may beequidistant for all side

Simplifies area division & provides good flexibility of tenantdistribution in the some way

Horizontal utility runs may also relatively equidistant from the core Combine with a square building plan, bearing exterior & core walls,

this location permits a floor plan tree of columns and thus totallyflexible for office layout

Disadvantages The central interior location limits the depth of offices in the mid-

zone of each floor It requires an access corridor around its perimeter

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MATERIAL Reinforced concrete

large net tension forces exist can negate the inherent efficiencyof concrete in compression resistance

Walls become thick

Concrete Fire-resistance, in particular of lift and piping shafts, is good Execution is efficient Lateral forces can be transmitted employing the surrounding skeleton sufficient stiffness

Steel Large and costly achieve its lateral stability.

necessary core stiffness relatively rapid assemblage of the prefabricated members. Enclose space, no extra consideration need to be given to fire proofing. Lack of ductility Respect to earth quake loading

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Structure

Cantilever floor

Hanging floor

Core-in-r.c frame Bunched hanging floors

Bunched cantilever floors

Composite

Core-in-steel frame

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System

Core-in-frame

Cantilever-core

Composite Core-cable

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CONTINUE CORE 2