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Introduction James W. & Frances G. McGlothlin Medical Education Center Virginia Commonwealth University Marissa Delozier Faculty Consultant: {Structural Option} Hanagan School of Medicine (VCU SOM) Richmond, VA VCU SOM Building

  1. Introduction James W. & Frances G. McGlothlin Medical Education Center Virginia Commonwealth University Marissa Delozier Faculty Consultant: {Structural Option} Hanagan School of Medicine (VCU SOM) Richmond, VA

  2. VCU SOM Building Statistics Project Overview 220, 000 GSF Proposal Gravity System 13 stories above ground Redesign Vibration Control Multipurpose (Admin, Classrooms, Labs) Lateral System $159 million Moment Frame Layout RAM Model October 2009 to March 2013 Cost & Schedule Analysis Architectural Impacts Designed for LEED Silver Certification Conclusions

  3. VCU SOM Primary Project Team Project Overview Proposal Gravity System Redesign Vibration Control Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis Architectural Impacts Conclusions

  4. VCU SOM Existing Gravity System Project Overview Drilled piers + caisson-grade beam system Proposal Gravity System Redesign Vibration Control Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis N Architectural Impacts Conclusions

  5. VCU SOM Existing Gravity System Project Overview Drilled piers + caisson-grade beam system Proposal Gravity System Composite Steel Flooring Redesign 3” 20 gauge decking Vibration Control Lateral System 3 ½” LW concrete topping Moment Frame Layout Wide Flange Steel Beams + Girders RAM Model Cost & Schedule Analysis N Typical Bay Sizes Architectural Impacts Conclusions 30’ x 20’ 30’ x 40’

  6. VCU SOM Existing Lateral System Project Overview Proposal Gravity System Concentrically braced frames + moment Redesign connections Vibration Control Lateral System 7 total, majority in one direction Moment Frame Layout RAM Model Cost & Schedule Analysis N Both wide flange + HSS Architectural Impacts Conclusions

  7. VCU SOM Opportunities Project Overview Increase efficiency of structural system Proposal Gravity System Redesign Vibration Control Save both time + money Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis In line with VCU SOM reinvented Architectural Impacts curriculum, create open environments Conclusions

  8. VCU SOM Opportunities Proposal Project Overview Increase efficiency of structural system Design alternate structural system Proposal Non-composite deck + K-series joists + girders Gravity System Heavier emphasis on use of moment frames Redesign Vibration Control Save both time + money Evaluate cost + schedule of redesign Lateral System Moment Frame Layout Structural Costs vs. Total Project Costs RAM Model Cost & Schedule Analysis In line with VCU SOM reinvented Investigate impacts on Architecture Architectural Impacts curriculum, create open environments Can a more open concept be achieved? Conclusions Can improvements be made?

  9. VCU SOM Gravity System Project Overview Possible Bay Configurations Proposal I. 30’ x 20’ – Joists traveling in 30’ direction Gravity System II. 30’ x 40’ – Joists traveling in 30’ direction Redesign III. 30’ x 20’ – Joists traveling in 20’ direction Vibration Control IV. 30’ x 40’ – Joists traveling in 40’ direction 40’ Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis Architectural Impacts Conclusions 30’

  10. VCU SOM Gravity System Hand Calculations Project Overview Possible Bay Configurations Layout Decking Joists Girders Proposal I. 30’ x 20’ – Joists traveling in 30’ direction Gravity System I 1.0C24 22K10 W18x35 II. 30’ x 40’ – Joists traveling in 30’ direction Redesign III. 30’ x 20’ – Joists traveling in 20’ direction Vibration Control IV. 30’ x 40’ – Joists traveling in 40’ direction Lateral System II 1.0C24 22K10 W24x146 Moment Frame Layout RAM Model III 0.6C24 14K4 W24x68 Cost & Schedule Analysis Architectural Impacts Conclusions IV 0.6C24 26K12 W24x76

  11. VCU SOM Gravity System Project Overview Walking Floor Final Proposal Layout Bay Size Evaluation Stiffness Evaluation Gravity System < 0.5 % g < 9 Hz Redesign I 30’x20’ 0.47 % g 5.47 Hz Pass Vibration Control 40’ Lateral System Moment Frame Layout II 30’x40’ 0.28 % g 3.54 Hz Pass RAM Model Cost & Schedule Analysis III 30’x20’ 0.38 % g 4.77 Hz Pass Architectural Impacts Conclusions IV 30’x40’ 0.58 % g 3.93 Hz Fail 30’

  12. VCU SOM Gravity System – Final Redesign Project Overview Layout Bay Size Decking Joists Girders Layout Bay Size Decking Joists Girders Proposal I 30’x20’ 1.0C24 22K10 W18x40 II 30’x40’ 1.0C24 22K10 W30x124 Gravity System Redesign Vibration Control Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis Architectural Impacts Conclusions

  13. VCU SOM Lateral System Project Overview Existing Lateral System – Braced Frames Proposed Lateral System – Moment Braced Proposal Gravity System Redesign Vibration Control Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis N Architectural Impacts Conclusions

  14. VCU SOM RAM Model Project Overview Center of Rigidity (91, 39) Center of Mass (88, 43.5) Proposal Gravity System Center of Mass + Center of Rigidity Redesign Vibration Control Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis Architectural Impacts Conclusions

  15. VCU SOM RAM Model Maximum Drifts Project Overview Loading Drift Allowable Drift Proposal Wind – Case 1 0.42 0.44 Gravity System Center of Mass + Center of Rigidity Redesign Wind – Case 2 0.32 0.44 Vibration Control Drift Checks Lateral System Wind – Case 3 0.32 0.44 Moment Frame Layout Wind Loadings – Case 1 Controls RAM Model Seismic Loadings Cost & Schedule Analysis Wind – Case 4 0.25 0.44 Architectural Impacts Seismic 0.62 2.9 Conclusions

  16. VCU SOM Frame Participation Proposed Lateral System Project Overview Proposal Frame 1 2 3 4 5 6 6 Gravity System # Redesign Avg. 20% 32% 20% 5% 5% 18% 5 Vibration Control Load 4 Lateral System 3 Moment Frame Layout RAM Model 2 Cost & Schedule Analysis Architectural Impacts 1 Conclusions

  17. VCU SOM Frame Participation Proposed Lateral System Project Overview Proposal Frame 1 2 3 4 5 6 6 Gravity System # Redesign Avg. 20% 32% 20% 5% 5% 18% 5 Vibration Control Load 4 Lateral System 3 Moment Frame Layout 7 8 9 10 RAM Model Frame 2 7 8 9 10 Cost & Schedule Analysis # Architectural Impacts Avg. 5% 54% 15% 26% 1 Conclusions Load

  18. VCU SOM Project Overview Proposal Gravity System Redesign Vibration Control Cost & Schedule Analysis {Breadth 1} Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis Architectural Impacts Conclusions

  19. VCU SOM Cost & Schedule Analysis {Breadth 1} Project Overview Original System Redesigned System Proposal Concrete $ 1.16 Concrete $ 1.25 Structural System Costs Gravity System Conc. Placing $ 0.25 Conc. Placing $ 0.18 Redesign Conc. Finishing $ 0.14 Conc. Finishing $ 0.67 Vibration Control Total Project Costs Lateral System Shear Studs $ 0.16 K-Series Joists $ 3.41 Curtain Wall Changes Moment Frame Layout Beams $ 4.20 Girders $ 8.17 Additional Fireproofing RAM Model Girders $ 11.72 Decking $ 2.22 Cost & Schedule Analysis Decking $ 2.80 Fireproofing $ 1.70 Architectural Impacts Schedule Comparison Fireproofing $ 0.81 Total ($/SF) $ 17.61 Conclusions Total ($/SF) $ 21.23

  20. VCU SOM Cost & Schedule Analysis {Breadth 1} Project Overview System Floor-to-Floor Ceiling Ht Total Height Proposal Structural System Costs Gravity System Original 14’ – 8” 11’ – 0” 196’ – 0” Redesign Redesign Vibration Control 14’ – 8” 10’ – 6” 196’ – 0” Total Project Costs Option 1 Lateral System Curtain Wall Changes Redesign Moment Frame Layout 15’ – 2” 11’ – 0” 202’ – 6” Option 2 Additional Fireproofing RAM Model Cost & Schedule Analysis Architectural Impacts Schedule Comparison Conclusions

  21. VCU SOM Cost & Schedule Analysis {Breadth 1} Project Overview System Original Redesign – A Redesign – B Proposal Structural System Costs Gravity System Decking Meets 2 HR Meets 2 HR Meets 2 HR Redesign Factory Vibration Control Steel Spray Spray Total Project Costs Lateral System Applied+Spray Curtain Wall Changes Moment Frame Layout Ceiling Non-Rated Non-Rated Rated Additional Fireproofing RAM Model Cost & Schedule Analysis Sprinkler Yes Yes No Architectural Impacts Schedule Comparison Price Conclusions – $ 0.92/SF $ 1.20/SF Increase

  22. VCU SOM Cost & Schedule Analysis {Breadth 1} Project Overview Task Original Duration Redesign Duration Proposal Structural System Costs Gravity System Steel Erecting Redesign 122 days 114 days + Detailing Vibration Control Total Project Costs Lateral System Curtain Wall Changes Deck Pour/ Moment Frame Layout 89 days 93 days Additional Fireproofing Fireproofing RAM Model Cost & Schedule Analysis Architectural Impacts Schedule Comparison Conclusions

  23. VCU SOM Project Overview Proposal Gravity System Redesign Vibration Control Architectural Impacts {Breadth 2} Lateral System Moment Frame Layout RAM Model Cost & Schedule Analysis Architectural Impacts Conclusions

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