hybrid solutions for tall buildings

8/10/2019 Hybrid Solutions for tall buildings

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Hybrid Solutions for Tall Buildings

Matthew J. EstherBEng CEng EurIng MICE MIStructE MSFE

Senior Structural En ineer - Associate

Farshad BerahmanBSc MSc PhDen or ruc ura ng neer

WS Atkins Middle EastDubai, UAE


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Atkins Worldwide

688

North America 877

Europe

Employees

11 11 1

Employees

688 mp oyees

2 55

Middle East & India

Employees1

Employees

We are based in over 130 offices in the UK and

a further 70 offices worldwide.


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Atkins In the Region

ABU DHABI 406

SHARJAH 290

TurkeyTurkey

KUWAIT 4

BAHRAIN 285

DUBAI METRO 186

REGIONAL 52

F&G 224

EgyptEgypt

OMAN 190

INDIA 204

Philippines 75

AfricaAfrica


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Burj Al Arab Dubai


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Atkins Tall Buildings


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Atkins The Tall Buildings Team

Ranjith Chandunni

Associate

Robert D Scott

Associate

Min-Hah Chun

Associate

Steve Harrison

Associate Director

Farshad BerahmanAndrey DanchevMatthew J. Esther Karsten Veith


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Dubai Metro UAE

Full Multidisciplinary Design

Design Coordination of Civi l Works

Geotechnical & Site Investigations

Construction Supervision


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BWTC Bahrain

ArchitectureCivil & Structural Engineering

MEP Engineering, Sustainable DesignConstruction Supervision


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Wind DirectionEnvironmental Design

9

Wind Impact

Wind Speed

u ng orm

Existing

Technology

16th July 2003


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Atkins Research and Development Dubai

Height on the 20th floor, Bur Dubai


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Delivering Sustainable Solutions

Collaboration with academia todevelop innovative anddeliverable sustainable solutions

We continuously challenge ourc en s, emp oyees an supp ychain to deliver holisticsustainable solutions through

Carbon Critical Design Engaging with industry on

the Emirates Environmental

Group (EEG)

Member: UK Green Building Council


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Introduction to Hybrid

-


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Hybrid Solutions Mega Frames

Lar e Gravit Transfer Structure

Coupling of Core Walls Mobilises Frame Action

Beams

Efficient Use of Materials

Careful Attention to Local Load Effects


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Hybrid Solutions Trump Tower


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Hybrid Solutions Icon Hotel


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Trum Tower & Hotel Dubai


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Trump TowerVideo Clip


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Trump Tower Initial Design Concept


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Trump Tower Initial Design Concept


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Trump Tower References for Connected Towers

Umeda Sky Building - Osaka

La Grande Arche De La Dfense - Paris


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Trump Tower General Layout Below Level 40


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Trump Tower General Layout at Level 40


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Trump Tower Structure & Primary Framing


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Trump Tower Transfer Structure: Level 40 to 41


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Trump Tower Hierarchy of Structure

Outrigger Cantilevers from

Coupling Trusses

Trusses Span Continuously

Between Outrigger and Walls.Outer Trusses Span Between

Outrigger and Walls.


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Trump Tower Transfer Structure: Level 40 to 41


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Trump Tower Coupling of the Concrete Cores

Coupling action reduces thelateral dri ft by over 70%Lateral displacement ofthe core walls uncoupled


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Trump Tower Shear Transfer

Shear Comparison

200

150

ght

External Load

100He

Resultant Shear in Truss

0

50

-30000 -20000 -10000 0 10000 20000 30000 40000

Shear


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Trump Tower Construction Sequence

Images Courtesy Tekla and Murray & Roberts


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T T


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T T


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T T C i S


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Trump Tower C t ti S


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Trump Tower C t ti S


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p q



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p q




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Adjustments & Phasing

Trump Tower Elastic Shortening


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64.7 mm69.5 mm

55.3 mm

. mm

Vertical Movement

Trump Tower Shortening & Deflections


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r g n a o s t o n na os on ou us men


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Adjustments

Two Parts

Column Shortening


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Column shortening to be overcome by

adjusting the length of columns

Continuous jacking of columns during the

construction stage


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& Monitorin

Trump Tower Long-term Shortening


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42.8 61.7 104.5

48.5

53.9

57.4

53.1

105.9

107.0

209.70

191.70

173.70

56.3

54.5

48.5

42.6

104.7

97.1

155.70

134.10

.

43.7

36.9

.

32.0

26.6

.

75.7

63.5

96.60

116.10

29.0

20.7

21.2

14.7

50.1

35.4

78.60

60.60

41.10

12.3

2.90

8.5

1.80

20.7

4.70.0

23.10

5.10

Floors

C and E

Shrinkage

Total

Vertical Displacement (mm)

Trump Tower Long-term Shortening


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Trump Tower


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Icon Hotel Dubai

Icon Hotel Dubai Promenade


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Icon Hotel Location


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Icon Hotel The Site


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Icon Hotel The Facts


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Key Facts

172 Branded Service

Apartments

42 storey wheel

Total built up area

110,000 sqm

Icon Hotel Building Geometry

160


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34th

level-MechanicalFloor m

Lift cores

Sky Lift

96m

165m

8th level-Mechanical

FloorAtrium

Elevation

10.8m

13.2 m

Plan

.

Icon Hotel Pre-Concept


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e areas w g s ear s resses:

1. Thicken the wall - more weight andmore concrete

-.

favourable Architecturally

3. Use steel plates to reinforce the highly

stressed concrete walls - Not standard

Punched Concrete Walls

Icon Hotel Pre-Concept


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Permanent

Composite Trusses

Sketches Courtesy LERA

Peer Review LERAs Proposed Alternative

Icon Hotel Concept Design - Functional Framing & Form Finding


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Icon Hotel Pre- Construction Advisor - SAMSUNG


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Images Courtesy Samsung

Icon Hotel Preliminary Design


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X

Icon Hotel Functional Framing


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rav y oa a

Icon HotelAxial Forces Under Gravity Loads


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Axial Force Diagram

Icon Hotel Construction Sequence


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Images Courtesy Tekla



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Icon Hotel Mega Frame LLRSDeformation has shear

configuration with

maximum inclination near

the base

Deformation

has bending

confi uration

and story drift

increase with

height


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Icon Hotel


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Icon Hotel Hybrid Mega Frame


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We used high-strength

steels to avoid carrying

load.

Icon Hotel Modes of Vibration


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T1 = 4.3 Sec T2 = 3.3 Sec T3 = 3.0 Sec

Icon Hotel Specialist Studies

Liquefaction Analysis

Soil Improvement


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Soil Improvement

Seismic Hazard Study Wind Tunnel Study

Floor vibration analysis

Connections Detail Design Long Term Effect (Column Shortening)

Performance Based Seismic Evaluation

Icon Hotel Wind Tunnel Studies


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Images & Data

Courtesy RWDI

n er s ory r ess an

Icon Hotel Design of Connections


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Icon Hotel Differential Shortening Between Inner and Outer Walls


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ICON HOTEL 29th January 2009

Icon Hotel


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ICON HOTEL 29th January 2009

Icon Hotel Performance Based Design Seismic Evaluation


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Seismic Hazard Study

Courtesy Fugro West Inc.

Icon Hotel Performance Based Seismic Design Perform 3D

Envelope of the concrete compression

strain at critical locations


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Coupling beams

-Concrete compression

strain 0.0016

All the members remained elastic except coupling

beams Building met the performance objectives.

Icon Hotel Performance Based Seismic Design Usage Ratios


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Icon Hotel Performance Based Seismic Design Perform 3D

Scaled Lander 1992

increased 4x to see the

extreme behaviour


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Conclusions

Lar e ravit transfer structures can be used efficientl to

mobilise frame action by coupling the core walls.

Performance based desi n rovides valuable information for


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the seismic design of geometrically complex structures which

lie beyond the realms of established building codes.


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Innovations for the future

hybrid solutions for tall buildings

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