vertical cities presentation

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VERTICAL CITYVERTICAL CITYCASE STUDY: NAKHEEL TOWER

Sandhya Ravindran

Under the guidance of: Dr. P.L.VIJAYAKUMARI

INTRODUCTION

INTRODUCTION

Takenaka Corporation, Japan proposed the concept of “VERTICAL CITIES”

A futuristic tower, called the X-Seed 4000 has been designed as an ecological structure of about 4000 meters high in Tokyo, Japan!

Solar Energy would power the X-Seed 4000 which could house between 500 000 to 1 million people. The projected cost of a building like this has been estimated between 300 to 900 billion dollars.

X-SEED 4000

www.themegallery.com

INTERIOR OF THE X-SEED 4000


DEFINITION :

A vertical city ,true to its name, is a very tall

mixed use development combining offices, a 5-star

hotel, luxury residential and serviced apartments,

an experience centre and observation facilities

along with a special sky function space creating a

vertical community of over 15,000 people.

Contents

1. Case study: Nakheel Tower

2. Structure

3. Architecture

4. Materials for construction

5. Environmental Aspects

6. Hindrance

7. Conclusion

THE NAKHEEL TOWER


Nakheel Tower

Nakheel Tower in itself will be a vertical city, accommodating residents in an efficient LEED rated, sustainable building.

This is the world’s first true,very tall mixed use development combining offices.

The global architecture practice believes that the design for the 270 hectare masterplan and more than 1 kilometre-high tower will provide the centrepiece for the future of Dubai's development.

The Nakheel tower


STRUCTURE


Structure

Structural FormBuilding Form

Primary Structural Elements

Wind Engineering

Stack Effect

Building Services

STRUCTURE

Building Form

To gain an adequate footprint for stability, the tower extends to nearly 100m in diameter, resulting in a 10:1 aspect ratio.

A central void space in the tower pushed all of the usable area to the perimeter.

4 quadrant approach –independent and redundant building systems of all kinds-structural, mechanical, electrical, fire egress, fire safety etc.

At every 25 levels,the tower legs are bound together by sky bridges.

•Four distinct means of exiting during emergency•Functioning as communities•As a belt truss •Lift zones•Delineate the different uses of the building


STRUCTURE

Structural Form

Maintain a uniform distribution of load throughout the structure.

Elements are sized based on strength considerations, while at the same time providing sufficient lateral stiffness.

Materials perform double-duty (gravity and lateral support).

Multiple load paths are created to give added redundancy and by placing material only where it is required for strength.

STRUCTURE


Drum Wall,analogous with a typical building’s central core wall.

Hammer Walls spring outwards to engage the structure at the perimeter.

Fin Walls spring inward primarily to support the core area

Link Walls tie the Drum Wall segments together

STRUCTURE


STRUCTURE

Wind Engineering

The slots serve to mitigate the vortex-shedding

Cut into 4 towers

Wind passes freely through the buiding thereby reducing the resistence.

STRUCTURE

Slots cut through the building

STRUCTURE

Logistics

Serviced by 156 lifts using double-deck and express lifts

Delivery is via remote loading and docking.

Internal lift shafts are to be used for construction lifts

Use of pre-assembled components

STRUCTURE

Stack Effect

A warm building in a cold climate behaves like a chimney

Problems occur during hot weather, with the pressure gradient operating in reverse.

The pressure created by stack effect causes air infiltration into the building at the high level, resulting in energy loss and loss of capacity of HVAC systems

Measures to mitigate Stack Effect

Provide anti-rooms

Revolving doorsIsolating docks

Multiple stages to entries

Pressure control for goods access

MATERIALS OF CONSTRUCTION


Overall weight of the structure should be less.

For the Nakheel Tower, concrete in excess of 100MPa strength is required with Young’s Modulus of nearly 50,000MPa.

Work on the concrete design was undertaken during schematic design.

Total volume of concrete will be 500,000 m3

ENVIRONMENTAL ASPECTS

Water

Energy

Materials

•Water conservation is by black water treatment, storm water harvesting and reuse of fire test water.

•Thermal wind generator farms will be set to create all the energy that would be needed.

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•Use of high performance facades to low energy use servicing

HINDRANCES


Intricate detailing

Advanced Logistics

Affects the Auto Industry

Induces seismic activities

SOME STAGGERING FACTS

• All of the reinforcing bars laid end to end could stretch from Dubai to New York (1/4 of the way around the world)

The building experiences five different microclimatic conditions over its height

The temperature in the atmosphere at the top of the building can be as much as 10 degrees cooler than the bottom

Due to the high speed shuttle lifts one may be able to see the sunset twice from the bottom and again from the top of the building

The goal is to achieve the highest LEED certification


SOME OF THE TALLEST BUILDINGS


AQUA,USA


Ripple/jelly effect created by variously sized balconies from top to bottom.

THE CHICAGO SPIRE


Modelled on the image of a giant drill poking through the ground.

THE BURJ DUBAI


When completed next year it will be the tallest man-made structure in the world and the tallest building by a long shot with a predicted height of 818m

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Any Questions??????????


vertical cities presentation

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core arealink walls