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11233 ADVANCE ARCHITECTURAL CONSTRUCTIONPRECEDENT STUDY - CCTV BEIJING, OMA

ELEANOR TULLOCK [10840686] | REINAH URQUEZA [10833945] | JEAH LOONG YEOH [10828174]

3mx3m High Density Vertical Structure

CCTV Beijing CCTV Beijing: 6mx6m Base Structure CCTV Beijing: 12mx12m Diagrid Structure CCTV Beijing: Stress Distribution Structure CCTV Beijing: Combined Structure

6mx6m High Density Diagrid Structure

High Density Stress Distribution Structure

High Density Stress Distribution Structure

High Density Combined Structure

12mx12m Low Density Vertical Structure

CCTV Beijing

FINAL DESIGN

24mx24m Low Density Diagrid Structure

Low Density Stress Distribution Structure

Low Density Stress Distribution Structure

FINAL GRID SYSTEM:Combination of 12mx12m low density vertical structure and high density stress distribution structure system

Low Density Combined Structure

PARAMETRIC DIAGRAMS

CCTV Beijing Topography Change:5 Degree Slope

Topography: Building on a Slope

Building Transformation:Angle of towers changed to �ttopograhy

Geometry: Stretch Y-axis Geometry: Stretch X-axisGeometry: Flip Horizontal AxisGeometry: RotateGeometry: Sheering on Y-axis Geometry: Extend Overhang

Topography: Building on a Cli� Topography: Building on a Mountain

96105

96 95

Building Transformation:Change of volume (bigger/heavierat the base, thinner/lighter at the top) to stabalize building

Grid System:Combination of 12mx12m low densityvertical structure and high densitystress distribution structure system

Location:- on the cli� of the Domain, facing Sydney Harbour- using the building to frame the Sydney Opera House and the harbour

10595

5

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EXPLODED FACADE SYSTEM

FACADE SECTION DETAIL [1:20]

Slabs

Reinforcement Layer:Additional Orthogonal Steel Structure

Fist Layer:Main Steel Structure with Reinforcement

Second Layer:Diagrid Steel Structure

Vertical Structure

Third Layer:Diagrid Steel Structure

Inner Glass Facade

Facade Grid Structure

Outer Glass Facade

Last Layer:Outer Steel Structure with Reinfoarcement as the First Layer

16mm air space

Extruded Aluminum closer plateby cladding contractor

Extruded aluminum snap on coverto glazing frame �xing screws tomatch surrounding cladding frames

Double glazed, double laminatedthermally broken, fully panelised,utilised, drained pressure equalisedfactory assembled cladding system onpainted mild steel cladding supportstructure, all my cladding contractor.

System to accomodateall tolerances and movements

Continuous vertical stainless steelinsert to aluminum facade

16mm air space

Double glazed, double laminatedthermally broken, fully panelised,utilised, drained pressure equalisedfactory assembled cladding system onpainted mild steel cladding supportstructure, all my cladding contractor.

System to accomodateall tolerances and movements



PARAMETRIC VARIATION: EXPLODED AXONOMETRIC



PERSPECTIVES



PARAMETRIC VARIATION: WINDOWS SECTION DETAIL [1:5]

Thermal Break

Glazing TapeGlazing Rubber

Glazing Stop

Body



CCTV BEIJING: EXPLODED AXONOMETRIC

Floor levels - from 3 below ground to 55 from ground level. Theseact as an internal sti�ening diaphram, working with outher internalstructural elementsto counter gravitational pull. In particular they prevent overturningin seismic conditions.

Denser Red grids on the outer diagrid structure are the areas which recieve the most stress, and thence are more compressed than other areas. Overstressed areas are doubled or quadrupled in density.Similarly the larger spacings indicate areas of less stress, hence the structure is economically thinned to avoid material waste and over-engineering. Nevertheless every diagonal grid has the same structural properties.

Additional mesh layers are for imposed loads, in particular seismicactivity. CCTV is located in an area of signi�cant seismic activity so that even in the most severe seismic event, quanti�ed as a levelthree (oroccurrence once every 2475 years) the building may experience severe structural damage but would not collapse. In particular there were concerns that the high use of structural steel would lead to reduced ductility, which was not the case as member thickness was tuned at a local level to increase �exibility.

Vertical structural elements in loop structure are indicative of the internal vertical structure which is a secondary support system to the ‘continuous loop’

The L shaped base section anchors and greatly sti�ens the towers atthe highest structural demand point.

Both towers lean against each other at an angle of 6 degrees, propped by the L shaped overhang which cantilevers from the tower.

The primary structure of CCTV is the multilayered external‘continuous tube structure’, accounting for 55% of all materialswhich has been broken down, separated from �oor plates in thisdrawing.

The diagonal grid is a re�ection of everyday forces and exceptionalloading conditions. The separations in density reveal the vastvariations in load.

The outermost steel diagrid frames the facade of glass panes.Thefacade, roofs and undersides assist in dispersing the load.

Curtain wall system - - Aluminium and Glass

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