introduction 120,000 sf 10 stories (90ft) $40 million aug. 2010 – dec.2011 presentation outline...

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Introduction 120,000 SF 10 Stories (90ft) $40 Million Aug. 2010 – Dec.2011 Presentation Outline Introduction Base Steel Redesign Progressive Collapse Tie Force Alternative Path Enhanced Local Resistance Architectural Breadth Conclusions Project Team Owner: Health Research Architect & Engineer: General Contractor:

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Page 1: Introduction 120,000 SF 10 Stories (90ft) $40 Million Aug. 2010 – Dec.2011 Presentation Outline Introduction Base Steel Redesign Progressive Collapse Tie

Introduction120,000 SF

10 Stories (90ft)$40 Million

Aug. 2010 – Dec.2011

Presentation Outline• IntroductionBase Steel RedesignProgressive Collapse

Tie ForceAlternative PathEnhanced Local

ResistanceArchitectural BreadthConclusions

Project Team

Owner: Health ResearchArchitect & Engineer:General Contractor:

Page 2: Introduction 120,000 SF 10 Stories (90ft) $40 Million Aug. 2010 – Dec.2011 Presentation Outline Introduction Base Steel Redesign Progressive Collapse Tie

Presentation OutlineIntroductionBase Steel RedesignProgressive Collapse

Tie Force• Alternative PathEnhanced Local

ResistanceArchitectural BreadthConclusions

Progressive CollapseUFC 4-023: Typical Action

Classifications

Alternative Path Analysis

Interaction Equation

Moment Divided by m-factorExpected Strengths Used

Typical Frames = 6

𝑃𝑟Ω∗𝑃𝑐

+

89 [ 𝑀𝑟𝑥Ω∗𝑀𝑐𝑥

+ 𝑀𝑟𝑦Ω∗𝑀𝑐𝑦 ]

𝑚− 𝑓𝑎𝑐𝑡𝑜𝑟

Page 3: Introduction 120,000 SF 10 Stories (90ft) $40 Million Aug. 2010 – Dec.2011 Presentation Outline Introduction Base Steel Redesign Progressive Collapse Tie

Presentation OutlineIntroductionBase Steel RedesignProgressive Collapse

Tie Force• Alternative PathEnhanced Local

ResistanceArchitectural BreadthConclusions

Progressive CollapseWest Façade Column

Alternative Path Analysis

Page 4: Introduction 120,000 SF 10 Stories (90ft) $40 Million Aug. 2010 – Dec.2011 Presentation Outline Introduction Base Steel Redesign Progressive Collapse Tie

Architecture BreadthExisting Interior Atrium View

Presentation OutlineIntroductionBase Steel RedesignProgressive Collapse

Tie ForceAlternative PathEnhanced Local

Resistance• Architectural BreadthConclusions

Atrium Curtain WallRedesigned Interior Atrium View

Page 5: Introduction 120,000 SF 10 Stories (90ft) $40 Million Aug. 2010 – Dec.2011 Presentation Outline Introduction Base Steel Redesign Progressive Collapse Tie

ConclusionsGoals

Presentation OutlineIntroductionBase Steel RedesignProgressive Collapse

Tie ForceAlternative PathEnhanced Local

ResistanceArchitectural Breadth• Conclusions

CostsProgressive Collapse Requirements

Slab Reinforcement: 596% IncreaseColumns: 113% IncreaseBeams: 9.9% Increase

Total Superstructure: 7.4% Increase

Design to UFC criteria Explore impacts of this analysis Minimal architectural impact