Post on 19-Jan-2016
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:
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
Presentation OutlineIntroductionBase Steel RedesignProgressive Collapse
Tie Force• Alternative PathEnhanced Local
ResistanceArchitectural BreadthConclusions
Progressive CollapseWest Façade Column
Alternative Path Analysis
Architecture BreadthExisting Interior Atrium View
Presentation OutlineIntroductionBase Steel RedesignProgressive Collapse
Tie ForceAlternative PathEnhanced Local
Resistance• Architectural BreadthConclusions
Atrium Curtain WallRedesigned Interior Atrium View
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