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Koshland Integrated Natural Science Center

Koshland Integrated Natural Science Center. Haverford College Haverford, Pennsylvania. Christopher J. Shelow. Structural Option. Senior Thesis. Spring ‘06. Koshland Integrated Natural Science Center. Introduction & Building Background Design Professionals Existing Conditions

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Koshland Integrated Natural Science Center

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  1. Koshland Integrated Natural Science Center Haverford College Haverford, Pennsylvania Christopher J. Shelow Structural Option Senior Thesis Spring ‘06

  2. Koshland Integrated Natural Science Center • Introduction & Building Background • Design Professionals • Existing Conditions • Proposal • Structural Study • Construction Management Study • Conclusions Thesis Presentation Outline

  3. Koshland Integrated Natural Science Center • Located on the Haverford College campus • 4-story laboratory facility w/basement • Also contains classrooms, offices, & communal spaces • 185,423 ft2 • Directly connected to existing Hilles & Sharpless Halls • Total project cost of $42.6 Million Introduction & Building Background

  4. Koshland Integrated Natural Science Center • Constructed in multiple phases • Completed in 2003 • State-of-the-art laboratories • Undergraduate & graduate research facility • Houses seven natural science departments Introduction & Building Background

  5. Koshland Integrated Natural Science Center • Introduction & Building Background • Design Professionals • Existing Conditions • Proposal • Structural Study • Construction Management Study • Conclusions Thesis Presentation Outline

  6. Koshland Integrated Natural Science Center • Owner – Haverford College (Physical Plant) • Haverford, PA • Architect – Ayers/Saint/Gross (ASG) Architects & Planners • Baltimore, MD • Engineer – CUH2A • Princeton, NJ • General Contractor/CM – Skanska USA Building, Inc. • Blue Bell, PA • Laboratory Planner – Earl Walls Associates • San Diego, CA Design Professionals

  7. Koshland Integrated Natural Science Center • Introduction & Building Background • Design Professionals • Existing Conditions • Proposal • Structural Study • Construction Management Study • Conclusions Thesis Presentation Outline

  8. Koshland Integrated Natural Science Center • Superstructure – Precast concrete framing • Foundation – CMU foundation/retaining walls, precast piers • Floor System – 10” precast plank w/ 2” topping • Façade – Stone & precast panels • Roof System – Steel framing w/ metal deck; precast plank Existing Conditions - Overview

  9. 10” 2” Topping Slab Koshland Integrated Natural Science Center • 10” precast concrete hollow core plank by Strescon • 2” cast-in-place concrete topping slab • Prestressed steel reinforcing tendons • Typical span of 31’-6” Existing Conditions – Floor System

  10. Koshland Integrated Natural Science Center • Typical bay: 31’-6” X 21’-0” • Precast beams : 24”x12” spanning 21’-0” • Precast columns : 16”x16” & 20”x20” • Typical story height of 13’ Existing Conditions – Floor Framing

  11. Koshland Integrated Natural Science Center • Separated by expansion joints into three independent structures • East Wing • West Wing • Link Existing Conditions – Expansion Joints

  12. Koshland Integrated Natural Science Center WEST WING LINK Existing Conditions – Typical Floor Plan EAST WING Expansion Jts. -

  13. 21’ 31’-5” 31’-5” 13’-8” Koshland Integrated Natural Science Center Typ. P.C. Column Typ. P.C. Beam EAST WING Existing Conditions – East Wing Plan Typ. P.C. Shear Wall

  14. Koshland Integrated Natural Science Center WEST WING Typ. P.C. Column Typ. P.C. Beam Existing Conditions – West Wing Plan 21’ Typ. P.C. Shear Wall 31’-6” 31’-6” 13’-8”

  15. Koshland Integrated Natural Science Center LINK Typ. CMU Shear Wall Typ. CMU Brg. Wall Existing Conditions – Link Plan 25’-11” 23’ 104’

  16. Koshland Integrated Natural Science Center • East & West Wings – typical steel bent frames; W-shapes • Link – precast plank w/ topping slab Existing Conditions – Roof System

  17. WEST WING LINK EAST WING Koshland Integrated Natural Science Center • East & West Wings – 8” precast concrete shear walls • Link – 10” CMU shear wall Existing Conditions – Lateral System

  18. Koshland Integrated Natural Science Center • Introduction & Building Background • Design Professionals • Existing Conditions • Proposal • Structural Study • Construction Management Study • Conclusions Thesis Presentation Outline

  19. Koshland Integrated Natural Science Center • Investigate an alternate system that could prove to be a more efficient system based on certain criteria • Investigation Criteria: • Cost of structural system • Construction schedule duration • Reduce loads – gravity & seismic • Maintain existing floor layout & architecture Proposal – Problem Statement

  20. Koshland Integrated Natural Science Center • Gravity system designs: • Composite slab on deck floor system • Structural steel floor framing – beams, girders, & columns • Maintain typical bay size & story height • Lateral system designs: • Reduced seismic loads • Concentric steel braced frame system • Check drift limitations • Construction Management comparisons: • Structural system cost • Construction schedule of structural system Proposal – Solution Process

  21. Koshland Integrated Natural Science Center • Additional design considerations: • All expansion joints will remain • Existing foundation remains; lighter overall building weight • Existing roof systems for East & West Wings remain; coincides steel framed system • Central stair case design to remain, preserving innovative design of spiraled cantilevered stairs Proposal

  22. Koshland Integrated Natural Science Center • Introduction & Building Background • Design Professionals • Existing Conditions • Proposal • Structural Study • Construction Management Study • Conclusions Thesis Presentation Outline

  23. Koshland Integrated Natural Science Center • 2003 International Building Code (IBC) • AISC Load and Resistance Factor Design (LRFD), 3rd Edition • ASCE 7-02 Minimum Design Loads for Buildings and Other Structures Structural Study – Design Codes

  24. Koshland Integrated Natural Science Center • Recalculation of gravity loads • Create building model in RAM • Perform RAM design of gravity members • Recalculation of lateral loads • Create several models of steel braced frames in STAAD Pro. • Check drift limitations • Calculate approximate cost of both structural systems & compare • Create construction schedules for systems & compare Structural Study – Procedure

  25. Koshland Integrated Natural Science Center • Slab: • 4” normal weight concrete, C.I.P. • Deck: • 1.5SB Normal Wt. Composite Metal Deck – Wheeling Catalog • 1 ½” depth; 20 gage • Span – 7’-0” Structural Study – Slab Design

  26. Koshland Integrated Natural Science Center Structural Study – Gravity Loads

  27. Koshland Integrated Natural Science Center • Typical beam size for typical bay: W10X12 • Typical girder size for typical bay: W21X44 • Typical column sizes: W10X33 & W10X39 Structural Study – RAM Design – East Wing

  28. Koshland Integrated Natural Science Center • Typical beam size for typical bay: W8X10, W10X12 • Typical girder size for typical bay: W18X40 • Typical column sizes: W10X33 & W10X39 Structural Study – RAM Design – West Wing

  29. Koshland Integrated Natural Science Center • Typical beam size for typical bay: W10X12 • Typical girder size for typical bay: W18X40 • Typical column size: W10X33 Structural Study – RAM Design – Link

  30. Koshland Integrated Natural Science Center • Despite a lighter system, seismic still controlled • Reduced shear on the building: Structural Study – Lateral Loads

  31. 14 15 11 6 9 5 8 2 7 10 13 12 1 4 3 Koshland Integrated Natural Science Center Structural Study – Braced Frames Layout N

  32. Koshland Integrated Natural Science Center • Torsional components calculated for each frame • In most, torsional forces negligible but still included • Columns may be biaxially loaded; accounted for in STAAD design • Strong and weak axis bending in braced frame columns Structural Study – Lateral System

  33. Koshland Integrated Natural Science Center • Frames design - concentric K-braces or X-braces • Drift limitations - L/600 • E-W direction: typ. K-braced frames • N-S direction: typ. X-braced frames Structural Study – Lateral System

  34. Koshland Integrated Natural Science Center • L/600 = 1.04” • Typ. column • W12X40 • Typ. girder • W21X44 • Typ. brace • W12X40 = 0.908” Structural Study – Typical K-braced Frame

  35. = 0.982” Koshland Integrated Natural Science Center • L/600 = 1.04” • Typ. column • W12X40 • Typ. beam • W12X14 • Typ. brace • W10X49 Structural Study – Typical X-braced Frame

  36. East Wing West Wing Link Koshland Integrated Natural Science Center Structural Study – 3D Models of Each Wing

  37. Koshland Integrated Natural Science Center • Introduction & Building Background • Design Professionals • Existing Conditions • Proposal • Structural Study • Construction Management Study • Conclusions Thesis Presentation Outline

  38. Koshland Integrated Natural Science Center • Cost breakdown of both structural systems • System cost comparison • Task duration estimates for both systems • Construction schedule comparison C. M. Study - Procedure

  39. Koshland Integrated Natural Science Center Precast Concrete System Structural Steel System VS. C. M. Study – Cost Comparison Summary Proposed Steel system saves approx. 14% of total structural cost

  40. Koshland Integrated Natural Science Center • Existing Precast Concrete System • Duration: 21 weeks • Proposed Steel System • Duration: 27 weeks • Existing precast system saves 6 weeks of construction time C. M. Study – Schedule Comparison

  41. Koshland Integrated Natural Science Center • Introduction & Building Background • Design Professionals • Existing Conditions • Proposal • Structural Study • Construction Management Study • Conclusions Thesis Presentation Outline

  42. Koshland Integrated Natural Science Center • Proposed steel system to save 14% structural cost • Precast system cuts erection time by 6 weeks • Material availability – systems similar • Floor layout & architecture remained unchanged • Findings: • Both systems viable options • 14% savings outweighs 6 wk. prolonged schedule • Proposed steel system is slightly more efficient Conclusions

  43. Koshland Integrated Natural Science Center • John Diaz & Ron Tola – Haverford College • Sam Rozycki – CUH2A • Valerie Gillespie – Gillespie Engineering • AE Department Faculty & Staff • Professor Parfitt – Thesis Advisor • Chris Glinski, Dave Melfi, Justin Mulhollan, and many other 5th year AE students • Family & Friends • Thank you Acknowledgements

  44. Koshland Integrated Natural Science Center Questions

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