Council on Tall Buildings. and Urban Habitat CAYAN TOWER CTBUH BEST TALL BUILDING MIDDLE EAST & AFRICA

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2 CAYAN TOWER CTBUH BEST TALL BUILDING MIDDLE EAST & AFRICA CTBUH AWARDS TH ANNUAL AWARDS NOVEMBER 6, 2014 SKIDMORE, OWINGS & MERRILL LLP CAYAN GROUP REAL ESTATE & INVESTMENT GEORGE J. EFSTATHIOU FAIA, RIBA CONSULTING PARTNER WILLIAM F. BAKER, PE, SE, FASCE, FIStructE, NAE, FREng STRUCTURAL ENGINEERING PARTNER

3 PRESENTATION OUTLINE Introduction Project Overview Design Competition Design Goals The Twist Photography Questions

4 PROJECT OVERVIEW Project Start Project Opening Use Building Height Levels Above Grade Levels Below Grade Project Area Design Recognition April 2005 Design Competition June 2013 Residential 307 m (1,000 feet) ,000 m 2 Residences 65,000 m 2 Amenities 2,800 m 2 Parking 26,800 m 2 Retail 1,300 m 2 10 Awards Tallest twisting building in the world

5 DESIGN COMPETITION Paid Competition Competition Start February 2005 Winner Announced May 2005 Invited Architects Skidmore, Owings & Merrill LLP Zaha Hadid HOK Hopkins Architects Design Brief A 65 story condominium building that is intended to be a landmark / icon in the skyline of Dubai

6 DESIGN GOALS Create an Iconic Form Create a Landmark Within Dubai Marina Take Full Advantage Of the Site Prominence Optimize Views From Within the Tower

7 TWISTING TOWERS

8 THE TWIST: SIMPLIFYING THE COMPLEX Architecture Columns sloping in 3 directions Structural Sloping columns & the twist MEP Distribution Vertical distribution of systems

9 THE TWIST Full 90 degree twist 1.2 degree shift/floor

10 THE TWIST

11 STRUCTURAL INNOVATION OPTION: STRUCTURE TWISTS Architecture: Excellent for Space Layout Occupant Impression? Window Panel Geometry? Structures: Impact of Sloped / Twisted Columns Constructability of Sloped / Twisted Columns Building Services Must Respond to Twist 2006 All rights reserved.

12 STRUCTURAL INNOVATION OPTION: STRUCTURE DOES NOT TWIST Architecture: Less Desirable for Space Layout Structures: Loss of Footprint Optimum Constructability Building Services Must Respond to Twist

13 STRUCTURAL INNOVATION: OPTION: HYBRID IDEA Architecture: Excellent for Space Layout Excellent for Exterior Wall Standardization Occupant Impression Structures: Larger Footprint Constructability Middle Ground Stepped vs. Sloped / Twisted Columns Building Services: Must Respond to Twist

14 STRUCTURAL INNOVATION: HYBRID TWIST Sloped, Stepped Scheme

15 STRUCTURAL INNOVATION: HYBRID TWIST Column Position Below Beam

16 STRUCTURAL INNOVATION: HYBRID TWIST Column Position Above Beam Column Position Below Beam

17 STRUCTURAL INNOVATION: HYBRID TWIST Column Position Overhead Column Position Above Beam Column Position Below Beam

18 STRUCTURAL INNVOATION: INCLINED VS STEPPED COLUMNS

19 STRUCTURAL INNOVATION: INCLINED VS STEPPED COLUMNS

20 STRUCTURAL INNOVATION: INCLINED VS STEPPED COLUMNS

21 STRUCTURAL INNOVATION: GENERATING THE TWIST Circular & Vertical Reinforced Concrete Shear Walls at Central Core Reinforced Concrete Stepped Perimeter Moment Frame Interior Twisting Gravity Columns (6) Reinforced Concrete Flat Plate Pile Supported Mat Foundation

22 STRUCTURAL INNOVATION: GENERATING THE TWIST R/C Walls at Circular Central Core Rectangular R/C Perimeter Tube Frame Columns R/C Spandrel Beams at Perimeter Tube Frame Square R/C Interior Columns (6) Slab Penetrations at Circulation Corridor 230 mm Thick R/C Flat Plate Shaped Corner Columns (4)

23 STRUCTURAL INNOVATION: CONCRETE FOR THE TOWER Concrete Material Properties Concrete Mix Design Self Consolidating Concrete (SCC) BASF High Range Water Reducing Admixture Portland Cement + Fly Ash + Microsilica

24 MANAGING THE WIND

25 MANAGING THE WIND The Twist Geometry of the Tower Effectively Reduced the Cross-wind Response (Accelerations) by as Much as 25%

26 MANAGING THE WIND

27 MANAGING THE WIND: CLASSIC TALL BUILDING PROBLEM Slab Building

28 CONSTRUCTING THE TWIST Lenton Products Formwork & Rebar SOM 3D Rebar Model

29 CONSTRUCTING THE TWIST

30 CONSTRUCTING THE TWIST

31 BUILDING MOVEMENT & MONITORING PROGRAM Long Term Creep Analysis Including Construction & Loading Sequencing

32 BUILDING MOVEMENT MONITORING

33 BUILDING MOVEMENT MONITORING

34 CLADDING SYSTEMS

35 CLADDING SYSTEM

36 MEP VERTICAL DISTRIBUTION Horizontal Distribution From Unit to Core Risers

37 MEP VERTICAL DISTRIBUTION Horizontal Distribution From Unit to Core Risers

38 TYPICAL FLOOR PLAN

39 TYPICAL APARTMENT MIX & BUILDING SECTION

40 INTERIOR VIEWS

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