4/22/2010 100 Eleventh Avenue N EW YORK, NEW YORK Tyler E. Graybill | Structural Option AE Senior Thesis Presentation | April 12, 2010 ©www.archpartners.com Faculty Consultant: Professor Thomas E. Boothby 1 4/22/2010 100 Eleventh Avenue Introduction to 100 Eleventh Avenue NEW YORK, NEW YORK PRESENTATION OUTLINE General Information • Introduction to 100 Eleventh Avenue • Proposal • 22-story residential building – Problem Statement • Location……………………….Manhattan’s West Chelsea District – Proposed Solutions • Size……………………………. 148, 000 sf • SlhTSlbStructural Depth I: PT Perimeter Slab • Project Cost……………………Unreleased Design – Understanding Existing Design • The Players – Alternate System Design Results - Design Architect…….………Jean Nouvel • Structural Depth II: Transfer System Design ©www.archpartners.com - Executive Architect………….Beyer Blinder Belle – - Structural Consultant……….DeSimone Consulting Engineers Understanding Existing Design – Alternate System Design Results • Cons truc tion Managemen t Brea dth – PT Perimeter Slab – Alternate Transfer System • Conclusions • Acknowledgements • Questions & Comments ©www.archpartners.com ©www.arte-factory.com Tyler E. Graybill | Structural Option 2 4/22/2010 100 Eleventh Avenue Introduction to 100 Eleventh Avenue NEW YORK, NEW YORK PRESENTATION OUTLINE Architectural Design Concept • Introduction to 100 Eleventh Avenue • Proposal • Panelized curtain wall system – Problem Statement - 1650 windows uniquely sized and oriented – Proposed Solutions - BillldbdfdBottom six levels enclosed by a second facade • SlhTSlbStructural Depth I: PT Perimeter Slab Design • Building as a “vision machine” – Understanding Existing Design – Alternate System Design Results • Curved facade meant to contour the corner of 19th street and West Side Highway • Structural Depth II: Transfer System Design – Understanding Existing Design – Alternate System Design Results • Cons truc tion Managemen t Brea dth – PT Perimeter Slab – Alternate Transfer System • Conclusions • Acknowledgements • Questions & Comments ©www.arte-factory.com ©www.archpartners.com ©www.arte-factory.com Tyler E. Graybill | Structural Option 3 4/22/2010 100 Eleventh Avenue Introduction to 100 Eleventh Avenue NEW YORK, NEW YORK PRESENTATION OUTLINE Existing Structural System • Introduction to 100 Eleventh Avenue • Proposal • Gravity System – Problem Statement - 9” thick two-way concrete flat plate floor system – Proposed Solutions - ChConcrete strength: • SlhTSlbStructural Depth I: PT Perimeter Slab • Slab – 6 ksi Design • Columns/Wall – 7-8 ksi – Understanding Existing Design - Typical spans of 18’ to 23’ – Alternate System Design Results • Structural Depth II: Transfer System • Lateral System Design - 12” core shear walls, in combination with seven “long” columns – Understanding Existing Design – Alternate System Design Results • Cons truc tion Managemen t Brea dth – PT Perimeter Slab – Alternate Transfer System • Conclusions Typical Floor Plan (Levels 7-21) • Acknowledgements • Questions & Comments ©www.arte-factory.com Tyler E. Graybill | Structural Option 4 4/22/2010 100 Eleventh Avenue Introduction to 100 Eleventh Avenue NEW YORK, NEW YORK PRESENTATION OUTLINE Existing Structural System • Introduction to 100 Eleventh Avenue • Proposal • Gravity System – Problem Statement - 9” thick two-way concrete flat plate floor system – Proposed Solutions - ChConcrete strength: • SlhTSlbStructural Depth I: PT Perimeter Slab • Slab – 6 ksi Design • Columns/Wall – 7-8 ksi – Understanding Existing Design - Typical spans of 18’ to 23’ – Alternate System Design Results • Structural Depth II: Transfer System • Lateral System Design - 12” core shear walls, in combination with seven “long” columns – Understanding Existing Design 6th Level – Alternate System Design Results • Intricate blbalcony system foun d at Leve ls 1 t hroug h6h 6 • Cons truc tion Managemen t Brea dth - Cantilevered columns at Level 2 allow for column free space at street-level atrium – PT Perimeter Slab – Alternate Transfer System • Conclusions • Acknowledgements • Questions & Comments ©www.arte-factory.com Tyler E. Graybill | Structural Option 5 4/22/2010 100 Eleventh Avenue Problem Statement NEW YORK, NEW YORK PRESENTATION OUTLINE Existing System – Perimeter Slab Strip • Introduction to 100 Eleventh Avenue • Proposal • Spans increase to maximum of 34 feet – Problem Statement • Facade load of 500 lb/ft – Proposed Solutions • As a resu lt, s la b t hic kens from 9” (typ ica l) to 18. 5” a long 9. 5’-wide port ion o f • SlhTSlbStructural Depth I: PT Perimeter Slab perimeter Design – Understanding Existing Design • Advantages – Alternate System Design Results - Practical means of meeting strength and deflection requirements • Structural Depth II: Transfer System Design – • Disadvantages Understanding Existing Design – Alternate System Design Results Neggpgppative effect on exposed ceiling appearance - • Cons truc tion Managemen t Brea dth - Decreased floor-to-ceiling height at perimeter – PT Perimeter Slab - Increased weight and material usage – Alternate Transfer System • Conclusions • Acknowledgements • Questions & Comments ©www.arte-factory.com Tyler E. Graybill | Structural Option 6 4/22/2010 100 Eleventh Avenue Problem Statement NEW YORK, NEW YORK PRESENTATION OUTLINE Existing Systems – 19th Floor Transfer System • Introduction to 100 Eleventh Avenue • Proposal • 3 columns transfer to accommodate a building setback of 13’ – Problem Statement • Forces transferred via 18.5” transfer slab, reinforced with #10’s @ 6” o.c. E.W. – Proposed Solutions (dbflb)(top and bottom of slab) • SlhTSlbStructural Depth I: PT Perimeter Slab Design • Advantages – Understanding Existing Design - Easily formed – Alternate System Design Results • Structural Depth II: Transfer System • Disadvantages Design – Understanding Existing Design - Very heavily reinforced – Alternate System Design Results • Cons truc tion Managemen t Brea dth – PT Perimeter Slab – Alternate Transfer System • Conclusions • Acknowledgements • Questions & Comments Section A-A ©www.arte-factory.com Tyler E. Graybill | Structural Option 7 4/22/2010 100 Eleventh Avenue Proposed Solutions NEW YORK, NEW YORK PRESENTATION OUTLINE Thickened Perimeter Slab Strip • Introduction to 100 Eleventh Avenue • Proposal • Post-tension 9.5’-wide slab strip – Problem Statement – Proposed Solutions • GlfDiGoal of Design • SlhTSlbStructural Depth I: PT Perimeter Slab - Reduce 18.5” perimeter slab strip to typical thickness of 9” without significant Design increase in cost or schedule – Understanding Existing Design – Alternate System Design Results • Structural Depth II: Transfer System 19th Floor Transfer Slab Design – Understanding Existing Design • Design alternate system using transfer beams in lieu of transfer slab – Alternate System Design Results • Cons truc tion Managemen t Brea dth •Goal of Design – PT Perimeter Slab - Substantially reduce cost, weight and material usage of system without – Alternate Transfer System significant impact on schedule • Conclusions • Acknowledgements • Questions & Comments ©www.arte-factory.com Tyler E. Graybill | Structural Option 8 4/22/2010 100 Eleventh Avenue Depth I: PT Perimeter Slab Design NEW YORK, NEW YORK PRESENTATION OUTLINE Understanding the Existing Design • Introduction to 100 Eleventh Avenue • Proposal • 10” thickness required for flexural strength – Problem Statement – Proposed Solutions • CiiCritica lDfll Deflect ion lim itat ions use dbd by structura l consu ltants • SlhTSlbStructural Depth I: PT Perimeter Slab - ∆ ≤ 1” (for portions of slab supporting facade) Design - ∆ ≤ L/360 (immediate) – Understanding Existing Design - ∆ ≤ L/240 (total) – Alternate System Design Results • Structural Depth II: Transfer System • Conclusion: deflection limitations drove existing design Design – Understanding Existing Design – Alternate System Design Results • Cons truc tion Managemen t Brea dth – PT Perimeter Slab – Alternate Transfer System • Conclusions Typical Floor without Thickened Perimeter • Acknowledgements • Questions & Comments ©www.arte-factory.com Tyler E. Graybill | Structural Option 9 4/22/2010 100 Eleventh Avenue Depth I: PT Perimeter Slab Design NEW YORK, NEW YORK PRESENTATION OUTLINE Design Procedure • Introduction to 100 Eleventh Avenue • Proposal • Single design for typical floor of Levels 7 through 21 – Problem Statement • Levels 2 through 6 require individual attention – Proposed Solutions • DiDesign an d ana lilysis assume d curve d per imeter to act as a s ing le • SlhTSlbStructural Depth I: PT Perimeter Slab equivalent frame Design – Understanding Existing Design – Alternate System Design Results • Structural Depth II: Transfer System Design – Understanding Existing Design – Alternate System Design Results • Cons truc tion Managemen t Brea dth – PT Perimeter Slab – Alternate Transfer System • Conclusions • Acknowledgements • Questions & Comments ©www.arte-factory.com Tyler E. Graybill | Structural Option 10 4/22/2010 100 Eleventh Avenue Depth I: PT Perimeter Slab Design NEW YORK, NEW YORK PRESENTATION OUTLINE Utilizing RAM Concept • Introduction to 100 Eleventh Avenue • Proposal • A finite element method (FEM) analysis program for elevated slabs – Problem Statement - Linear elastic analysis – Proposed Solutions • SlhTSlbStructural Depth I: PT Perimeter Slab • FEM (as opposed to more traditional Equivalent Frame Method) advantageous in Design modeling highly irregular floors with no regular grid – Understanding Existing Design – Alternate System Design Results • Links FEM analysis with concrete