Agricultural Hall and Annex Easting Lansing, MI

Agricultural Hall and AnnexAgricultural Hall and AnnexEasting Lansing, MIEasting Lansing, MI

Ismail Al-HadhramiIsmail Al-HadhramiAE – Structural OptionAE – Structural Option

Presentation OutlinePresentation Outline

(1) Existing Building Background (1) Existing Building Background (2) Structural Systems(2) Structural Systems

- Gravity System- Gravity System- Lateral System- Lateral System

(3) Proposed Thesis(3) Proposed Thesis(4) Structural Design (4) Structural Design (5) Construction Management (5) Construction Management (6) Conclusion(6) Conclusion

Agricultural Hall and Annex Ismail Al-Hadhrami-Structural OptionAgricultural Hall and Annex Ismail Al-Hadhrami-Structural Option


Project Team Project Team

(1) Owner(1) Owner- Michigan State University - Michigan State University

(2) Architect(2) Architect - SmithGroup - SmithGroup

(3) Structural Engineer(3) Structural Engineer - SmithGroup- SmithGroup

(6) Project Manager(6) Project Manager- SmithGroup- SmithGroup

(5) MEP Engineer(5) MEP Engineer- SmithGroup- SmithGroup

Building Location Building Location

Michigan State University CampusMichigan State University Campus


www.msu.eduwww.msu.edu

Agricultural Hall and Annex

Existing Building

North Kedzie Hall

Building Information Building Information

(1)(1) Designed to be Designed to be five-story with five-story with penthousepenthouse

(2)(2) Three floors have Three floors have been builtbeen built

(3)(3) 1000 SQ FT/Floor1000 SQ FT/Floor(4)(4) Use – office Use – office

building building


Structural SystemsStructural Systems Gravity System Gravity System

- Cast-in-place one-way- Cast-in-place one-way joistjoist

- 30” and 20” clear spans- 30” and 20” clear spans- Joist depth = 16” deep- Joist depth = 16” deep

+ 4.5” slab+ 4.5” slab- Girders depth = 27.5” - Girders depth = 27.5”

+ 4.5” slab+ 4.5” slab Columns Columns

- - 24” x 24” 24” x 24”


Structural System Structural System Lateral System Lateral System

- Seismic Loads govern- Seismic Loads govern- Concrete Moment - Concrete Moment

Frames Frames


Proposal Proposal Building Design Codes ComparisonBuilding Design Codes Comparison US Standards vs. British StandardsUS Standards vs. British Standards FocusFocus

- Gravity Loads- Gravity Loads- Loads Combinations- Loads Combinations- Wind Design Procedures- Wind Design Procedures

Gravity Systems (US Standards)Gravity Systems (US Standards)- Wide-Module One-way Joist System - Wide-Module One-way Joist System - Flat Slab - Flat Slab - Composite Steel with Composite Deck - Composite Steel with Composite Deck - East Lansing, MI- East Lansing, MI

Gravity Systems (British Systems)Gravity Systems (British Systems)- Flat Slab - Flat Slab - Two-way Slab with Interior Beams- Two-way Slab with Interior Beams- Muscat, Oman- Muscat, Oman

Lateral System Lateral System - Concrete moment frames for concrete structures- Concrete moment frames for concrete structures- Moment frames and braced frames for steel structure- Moment frames and braced frames for steel structure

Cost and Time Comparison Cost and Time Comparison


Design Codes Design Codes USUS

- ACI 318-02- ACI 318-02- IBC 2003- IBC 2003-ASCE 7-02-ASCE 7-02

BritishBritish-BS 8110-BS 8110-Reinforced Concrete Building -Reinforced Concrete Building

Examples based on BS 8110Examples based on BS 8110


US Codes vs. British Codes US Codes vs. British Codes

Office Office BuildingBuilding

US US StandardsStandards

British British StandardsStandards

Live LoadsLive Loads 50 psf 50 psf 52.5 psf 52.5 psf

PartitionsPartitions 20 psf 20 psf 20.5 psf 20.5 psf

CorridorsCorridors 80 psf80 psf 83.5 psf83.5 psf

Miscellaneous Miscellaneous 15 psf15 psf 15 psf15 psf

Gravity LoadsGravity Loads


US Codes vs. British Codes (cont.) US Codes vs. British Codes (cont.)

US Standards ACI 318-US Standards ACI 318-0202

British StandardsBritish Standards

1- U = 1.4(D+F)1- U = 1.4(D+F)2- U = 1.2(D+F+T) + 1.6 (L+H) + 0.5 (Lr 2- U = 1.2(D+F+T) + 1.6 (L+H) + 0.5 (Lr

or S or R)or S or R)3- U = 1.2D + 1.6(Lr or S or R) + (1.0l or 3- U = 1.2D + 1.6(Lr or S or R) + (1.0l or

0.8W)0.8W)4- U = 1.2D + 1.6W + 1.0L +0.5(Lr or S or 4- U = 1.2D + 1.6W + 1.0L +0.5(Lr or S or

R)R)5- U = 1.2D + 1.0E+ 1.0L + 0.2S5- U = 1.2D + 1.0E+ 1.0L + 0.2S6- U = 0.9D +1 .6W + 1.6H6- U = 0.9D +1 .6W + 1.6H7- U = 0.9D + 1.0 E + 1.6 H7- U = 0.9D + 1.0 E + 1.6 H

1- U = 1.4 DL+ 1.6 LL + 1.4 En 1- U = 1.4 DL+ 1.6 LL + 1.4 En

2- U = 1.4 ( DL + W + En)2- U = 1.4 ( DL + W + En)

3- U = 3- U = 1.2 ( DL + LL + W + En)1.2 ( DL + LL + W + En)

Loads CombinationsLoads Combinations


US Codes vs. British Codes (cont.) US Codes vs. British Codes (cont.) Wind Design ProcedureWind Design Procedure


US Codes Method 2 – ASCE 7-02US Codes Method 2 – ASCE 7-02

1- The basic wind speed V and wind directionality factor Kd 1- The basic wind speed V and wind directionality factor Kd 2- An importance factor I2- An importance factor I3- An exposure category and velocity pressure exposure coefficient Kz 3- An exposure category and velocity pressure exposure coefficient Kz 4- A topographic factor Kzt4- A topographic factor Kzt5- A gust effect factor G 5- A gust effect factor G 6- An enclosure classification6- An enclosure classification7- Internal pressure coefficient GCpi 7- Internal pressure coefficient GCpi 8- External pressure coefficients Cp8- External pressure coefficients Cp9- Velocity pressure qz or qh9- Velocity pressure qz or qh10- Designed wind load p10- Designed wind load p

US Codes vs. British Codes (cont.) US Codes vs. British Codes (cont.) Wind Design Procedure (cont.)Wind Design Procedure (cont.)


BS 8110BS 8110

1- Determine the basic wind speed 1- Determine the basic wind speed 2- Read off appropriate value of factor S2- Read off appropriate value of factor S2 2 (k(kzz))3- Multiply V by S3- Multiply V by S22 to obtain characteristic wind speed to obtain characteristic wind speed

VVss. . 4- Read off characteristic wind pressure w4- Read off characteristic wind pressure wkk

corresponding to Vcorresponding to Vss

5- Determine force coefficient C5- Determine force coefficient Cf f

6- F = w6- F = wkk A C A Cff

Design of Gravity SystemsDesign of Gravity Systems Wide Module One-way Skip Joist -USWide Module One-way Skip Joist -US

Design Criteria Design Criteria - Girders depth = joists depth - Girders depth = joists depth - T-Beams requirements apply- T-Beams requirements apply- Minimum cover = 1 ½ in- Minimum cover = 1 ½ in- Design shear strength = - Design shear strength = 22 Φ √f’c bw dΦ √f’c bw d- - Minimum shear reinforcement =Minimum shear reinforcement =50 (bws)/ fy50 (bws)/ fy


CRSI 2002CRSI 2002

Design of Gravity Systems (cont.)Design of Gravity Systems (cont.) Wide Module One-way Skip Joist US (cont.)Wide Module One-way Skip Joist US (cont.) Design ResultDesign Result

- - 66” Forms + 6” Ribs @ 72 c-c 66” Forms + 6” Ribs @ 72 c-c - depth = 24.5 in (20” Deep Rib + 4.5” Top Slab)- depth = 24.5 in (20” Deep Rib + 4.5” Top Slab)- Concrete quantity = 83 psf- Concrete quantity = 83 psf


For the End Span

Tabulated Capacity 1002 plf

Top Bars # 4 at 10 in

Bottom Bars 2 # 7

Stirrups Single leg stirrups, # 3 spaced at 11 in for 123 inFor the Interior Span

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

Design of Gravity Systems (cont.)Design of Gravity Systems (cont.) Wide Module One-way Skip Joist US (cont.)Wide Module One-way Skip Joist US (cont.)


Design of Gravity Systems (cont.)Design of Gravity Systems (cont.)

Design Criteria Design Criteria


Equivalent Frame MethodEquivalent Frame Method ADOSS SoftwareADOSS Software

Design of Gravity Systems (cont.)Design of Gravity Systems (cont.) Flat Slab with Drop Panels Flat Slab with Drop Panels

–US–US


Design ResultsDesign Results

Item Value Comment

Slab thickness 12.5” > Minimum

Drop panel thickness 3.5 > ¼ slab thick.

Maximum deflection 0.235” << Allowable

Design of Gravity Systems (cont.)Design of Gravity Systems (cont.) Flat Slab with Drop Panels Flat Slab with Drop Panels

–British Stand.–British Stand.



Item Value Comment

Slab thickness 13”

Drop panel thickness 3.5 > ¼ slab thick.

Maximum deflection 0.235” << Allowable

Design of Gravity Systems (cont.)Design of Gravity Systems (cont.) Two-way Slab with Beams Two-way Slab with Beams

– British Stand.– British Stand.



Item Value Comment

Slab thickness 10.5”

Maximum deflection 0.236 in << Allowable

Lateral SystemLateral System Seismic controlsSeismic controls

SAP 2000SAP 2000


Concrete Moment FramesConcrete Moment Frames

Lateral System (cont.)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





Lateral System (cont.)Lateral System (cont.) Design ResultDesign Result


One-way One-way Skip Joist Skip Joist

Flat Slab Flat Slab US US CodesCodes

Flat Slab Flat Slab British British CodesCodes

Two-way Two-way with beamswith beams

Column Column SizesSizes

18” x 18”18” x 18” 24” x 24”24” x 24” VariesVaries20” x 20”20” x 20”22” x 22”22” x 22”24” x 24”24” x 24”

VariesVaries14 x 1414 x 1418” x 18”18” x 18”20” x 20”20” x 20”

Steel StructureSteel Structure Framing System Framing System

- - Composite steel with composite metal DeckComposite steel with composite metal Deck - - Beams are spaced 5’ O.C.Beams are spaced 5’ O.C.


Lateral System Lateral System - - Braced Frames around stairwells (Chevron, )Braced Frames around stairwells (Chevron, )- Braced Frames around Elevator shaft (X)- Braced Frames around Elevator shaft (X)

- Moment Frames around the perimeter - Moment Frames around the perimeter

Typical Floor Plan Typical Floor Plan

Steel Structure (cont.)Steel Structure (cont.)


Added columns

Braced framesBraced Frames

Moment Frames

Braced and Moment Frames Braced and Moment Frames






Steel Structure (cont.)Steel Structure (cont.) Design Results Design Results

(cont)(cont)


W14 x 82

W 14 x 43

W 8 x 10

Steel Structure (cont.)Steel Structure (cont.) Stress Design Check (Interaction Eq.)Stress Design Check (Interaction Eq.)


0.8 – 0.89

Construction ManagementConstruction Management RSMeans 2005RSMeans 2005 ICE 2000ICE 2000 MCMC2 Modification Factor =0.96


Construction Management (cont.)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 XXXX

Construction Management (cont.)Construction Management (cont.)


System Comparison ( Concrete vs. Steel)

System $ Cost Preferred System

One-way Wide Module Joist

573,600

Composite Steel with Composite Metal Deck

278,200 XXXXXX

ConclusionConclusion US StandardsUS Standards

- - Concrete vs. ConcreteConcrete vs. Concrete --Wide Module One-way JoistWide Module One-way Joist

- - Concrete vs. Steel Concrete vs. Steel - - Composite Steel with Composite Metal Composite Steel with Composite Metal

DeckDeck

Conclusion (cont.)Conclusion (cont.) British StandardsBritish Standards

- - Concrete vs. ConcreteConcrete vs. Concrete --Two-way with interior BeamsTwo-way with interior Beams

AcknowledgmentAcknowledgment Professor K. Parfitt – Special Thanks Professor K. Parfitt – Special Thanks Dr. Ali MemariDr. Ali Memari Dr. L. HanaganDr. L. Hanagan Dr. T. BoothbyDr. T. Boothby Mr. Masoud Al-HashimiMr. Masoud Al-Hashimi Mr. Ammar MohammedMr. Ammar Mohammed Gary StrandGary Strand John McCarthyJohn McCarthy Selim ErcanSelim Ercan Pat HopplePat Hopple Darren HowardDarren Howard Joe ChanJoe Chan John HillJohn Hill

Questions?Questions?

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Agricultural Hall and Annex Easting Lansing, MI

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