Agricultural Hall and Annex Easting Lansing MI Ismail

Agricultural Hall and Annex Easting Lansing, MI Ismail Al-Hadhrami AE – Structural Option

Presentation Outline (1) Existing Building Background (2) Structural Systems - Gravity System - Lateral System (3) Proposed Thesis (4) Structural Design (5) Construction Management (6) Conclusion Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Project Team (1) Owner - Michigan State University (2) Architect - Smith. Group (3) Structural Engineer - Smith. Group (6) Project Manager - Smith. Group (5) MEP Engineer - Smith. Group Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Building Location n Michigan State University Campus Existing Building Agricultural Hall and Annex North Kedzie Hall www. msu. edu Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Building Information (1) (2) (3) (4) Designed to be five-story with penthouse Three floors have been built 1000 SQ FT/Floor Use – office building Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Structural Systems n Gravity System - Cast-in-place one-way joist - 30” and 20” clear spans - Joist depth = 16” deep + 4. 5” slab - Girders depth = 27. 5” + 4. 5” slab q Columns - 24” x 24” Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Structural System n Lateral System - Seismic Loads govern - Concrete Moment Frames Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Proposal n n n q Building Design Codes Comparison US Standards vs. British Standards Focus - Gravity Loads - Loads Combinations - Wind Design Procedures Gravity Systems (US Standards) - Wide-Module One-way Joist System - Flat Slab - Composite Steel with Composite Deck - East Lansing, MI Gravity Systems (British Systems) - Flat Slab - Two-way Slab with Interior Beams - Muscat, Oman Lateral System - Concrete moment frames for concrete structures - Moment frames and braced frames for steel structure Cost and Time Comparison Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Design Codes n US q - ACI 318 -02 - IBC 2003 -ASCE 7 -02 British -BS 8110 -Reinforced Concrete Building Examples based on BS 8110 Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

US Codes vs. British Codes n Gravity Loads Office Building US Standards British Standards Live Loads 50 psf 52. 5 psf Partitions 20 psf 20. 5 psf Corridors 80 psf 83. 5 psf Miscellaneous 15 psf Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

US Codes vs. British Codes (cont. ) n Loads Combinations US Standards ACI 318 - British Standards 02 1 - U = 1. 4(D+F) 2 - U = 1. 2(D+F+T) + 1. 6 (L+H) + 0. 5 (Lr or S or R) 3 - U = 1. 2 D + 1. 6(Lr or S or R) + (1. 0 l or 0. 8 W) 4 - U = 1. 2 D + 1. 6 W + 1. 0 L +0. 5(Lr or S or R) 5 - U = 1. 2 D + 1. 0 E+ 1. 0 L + 0. 2 S 6 - U = 0. 9 D +1. 6 W + 1. 6 H 7 - U = 0. 9 D + 1. 0 E + 1. 6 H Agricultural Hall and Annex 1 - U = 1. 4 DL+ 1. 6 LL + 1. 4 En 2 - U = 1. 4 ( DL + W + En) 3 - U = 1. 2 ( DL + LL + W + En) Ismail Al-Hadhrami-Structural Option

US Codes vs. British Codes (cont. ) n Wind Design Procedure US Codes Method 2 – ASCE 7 -02 1 - The basic wind speed V and wind directionality factor Kd 2 - An importance factor I 3 - An exposure category and velocity pressure exposure coefficient Kz 4 - A topographic factor Kzt 5 - A gust effect factor G 6 - An enclosure classification 7 - Internal pressure coefficient GCpi 8 - External pressure coefficients Cp 9 - Velocity pressure qz or qh 10 - Designed wind load p Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

US Codes vs. British Codes (cont. ) n Wind Design Procedure (cont. ) BS 8110 1 - Determine the basic wind speed 2 - Read off appropriate value of factor S 2 (kz) 3 - Multiply V by S 2 to obtain characteristic wind speed Vs. 4 - Read off characteristic wind pressure wk corresponding to Vs 5 - Determine force coefficient Cf 6 - F = wk A Cf Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Design of Gravity Systems n Wide Module One-way Skip Joist -US n CRSI 2002 n Design Criteria - Girders depth = joists depth T-Beams requirements apply Minimum cover = 1 ½ in Design shear strength = 2 Φ √f’c bw d Minimum shear reinforcement =50 (bws)/ fy Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Design of Gravity Systems (cont. ) n Wide Module One-way Skip Joist US (cont. ) n Design Result - 66” Forms + 6” Ribs @ 72 c-c - depth = 24. 5 in (20” Deep Rib + 4. 5” Top Slab) - Concrete quantity = 83 psf For the End Span Tabulated Capacity 1002 plf Top Bars # 4 at 10 in Bottom Bars 2#7 Stirrups For the Interior Span Single leg stirrups, # 3 spaced at 11 in for 123 in Tabulated Capacity 1774 plf Top Bars # 5 at 11 in Bottom Bars 2#7 Stirrups Single leg stirrups, # 3 spaced at 11 in for 125 in Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Design of Gravity Systems (cont. ) n Wide Module One-way Skip Joist US (cont. ) Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Design of Gravity Systems (cont. ) n n n Design Criteria Equivalent Frame Method ADOSS Software Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Design of Gravity Systems (cont. ) n n Flat Slab with Drop Panels –US Design Results Item Value Comment Slab thickness 12. 5” > Minimum Drop panel thickness 3. 5 > ¼ slab thick. Maximum deflection 0. 235” << Allowable Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Design of Gravity Systems (cont. ) n n Flat Slab with Drop Panels –British Stand. Design Results Item Value Comment Slab thickness 13” Drop panel thickness 3. 5 > ¼ slab thick. Maximum deflection 0. 235” << Allowable Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Design of Gravity Systems (cont. ) n n Two-way Slab with Beams – British Stand. Design Results Item Value Slab thickness 10. 5” Maximum deflection 0. 236 in Comment << Allowable Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Lateral System n Seismic controls n Concrete Moment Frames n SAP 2000 Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Lateral System (cont. ) Frame Design Considerations: 1 – Same Size Columns 2 - Constant dimensions 3 - 4% Concrete/Steel reinforcement ratio 4 - Drift was set to not to exceed L/400 8 - 5% percent of building width was included to account for torsional effect Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Lateral System (cont. ) Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Lateral System (cont. ) Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Lateral System (cont. ) n Design Result Column Sizes One-way Skip Joist Flat Slab US Codes Flat Slab British Codes Two-way with beams 18” x 18” 24” x 24” Varies 20” x 20” 22” x 22” 24” x 24” Varies 14 x 14 18” x 18” 20” x 20” Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Steel Structure n n Framing System - Composite steel with composite metal Deck - Beams are spaced 5’ O. C. Lateral System - Braced Frames around stairwells (Chevron, ) - Braced Frames around Elevator shaft (X) - Moment Frames around the perimeter Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Steel Structure (cont. ) n Typical Floor Plan Added columns Braced frames Frames Moment Frames Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Steel Structure (cont. ) n Braced and Moment Frames Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Steel Structure (cont. ) n Design Results Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Steel Structure (cont. ) n Design Results (cont) W 14 x 82 W 14 x 43 W 8 x 10 Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Steel Structure (cont. ) n Stress Design Check (Interaction Eq. ) 0. 8 – 0. 89 Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Construction Management n n RSMeans 2005 ICE 2000 MC 2 Modification Factor =0. 96 Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

Construction Management (cont. ) System Comparison ( Concrete Structures) System Cost Time Preferred System One-way Wide Module Joist (Skip Joist System) 573, 600 5. 3 days/ floor XXXX Flat Slab with Drop Panels (US Standards) 742, 400 6. 13 days/ floor Flat Slab with Drop Panels (British Standards) 760, 900 7. 32 days/ floor Two-way Slab with Beams (British Standards) 568, 800 6. 37 days/ floor Agricultural Hall and Annex XXXX Ismail Al-Hadhrami-Structural Option

Construction Management (cont. ) System Comparison ( Concrete vs. Steel) System $ Cost One-way Wide Module Joist 573, 600 Composite Steel with Composite Metal Deck 278, 200 Agricultural Hall and Annex Preferred System XXXXXX Ismail Al-Hadhrami-Structural Option

Conclusion n US Standards - Concrete vs. Concrete -Wide Module One-way Joist - Concrete vs. Steel - Composite Steel with Composite Metal Deck

Conclusion (cont. ) n British Standards - Concrete vs. Concrete -Two-way with interior Beams

Acknowledgment n n n n Professor K. Parfitt – Special Thanks Dr. Ali Memari Dr. L. Hanagan Dr. T. Boothby Mr. Masoud Al-Hashimi Mr. Ammar Mohammed Gary Strand John Mc. Carthy Selim Ercan Pat Hopple Darren Howard Joe Chan John Hill

Questions?