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Steel vs Concrete
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Who Are We?
Soil
Agenda
Seismic Data
Environment
Open Web Steel Joist
Joist Spacing is 600mm.
Footings & Foundation Design
Composite Slab
Roof Deck Design
Spread Footing Design
Column Groupings
Footing Design Procedure
Foundation Layout
Main Beam Section: W640x256
Secondary Beam Section: W310x129
Composite Deck Profile: P2348 Composite (From CANAM Catalogue)
Preliminary Considerations
Total Axial load = 730 kN
Shear Length = 50m
Linear Shear Force = 730/50 = 14.6 kN/m
Steel Deck Profile = P-3606
Checking for:
Designing for:
Footing Design Procedure
Foundation Design Procedure
Footing Design Procedure
Foundation Design Procedure
Area
A = Pf / qf
qf : factored bearing soil pressure used in designing for flexure and shear
b = A^0.5
Soil Distribution
No overturn due to horizontal loads, (-) soil stress
Maximum Soil Stress:
Pf /A + Mx(Y)/ I + My (Y)/ I
Minimum Soil Stress:
Pf /A - Mx(Y)/ I - My (Y)/ I
One - Way Shear
Flexural Reinforcement
Two - Way Shear
Slab on Grade Design
Concrete Pedestal Design
Pro =(α1)(φc)(fc')(Ag - Ast) + (φs)(fy)(Ast)
Asfs = /2 x F
Use 10M bars @ 500mm c-c.
Composite Floor Design
Roof Design
Anchor Rods
Base Plate
Combined Footing
Reinforcements based on:
OWSJ
Rod dimensions:
Diameter = 19 mm
Length = 762 mm
Shear check:
Vr = 0.6 φ Aar Fu
Aar = cross sectional
area of anchor rod
Tension check:
Tr = 0.67 AnFu
An = tensile area of rods
= 0.85Ag
Combined check:
(Vf / Vr)^2 + (Tf / Tr)^2 <= 1
Required area of plate = Cf / Br
Plate thickness = (2Cfm^2/BCΦFy)^0.5
Cf = total factored column load (kN)
m = plate dimension
BC = area of plate (mm^2)
Φ = 0.9 for steel
Fy = specified minimum yield strength (MPa)
Cost Estimation
Cost Estimation
ETABS Models
Roof Cross Section
Loadings
Gravity Load
Lateral Loads
Snow Load
Seismic Load
S = Is[Ss(CbCwCsCa)+Sr] (Values Obtained from NBC)
Ss = 1.2 kPa (1/50 year value)
Sr = 0.4 kPa (1/50 year value)
Cs = 1 ; Cb = 0.8 ; Is = 1.15 ; Cw = 1
Ca (0) = 4.601
S = 2.5 kPa.
Dead Load
Steel
Wind Load
Weight = Volume (m^3) * Unit Weight (KN/m^3)
P = Iw.Cg.Ce.Cp.q
Importance factor, Iw = 1.15
Gust effect factor , Cg = 2.0
Exposure factor, Ce = 1.3
Internal wind pressure coefficient
- East West direction
- North South direction
Hourly wind pressures,
q = 0.35 (1 in 50 year return period)
q = 0.26 (1 in 10 year return period)
E-W
N-S
Live Load
Obtained from NBC 2010
Floor plan
Floors Mesh
3D view of building
Second Floor
First Floor
Cost Estimation
Fourth Floor
Third Floor
Second Floor
Summary Sheet
OWJ Spacing = 600 mm
Stress Diagrams
Load Combination
Beam, Composite beam, Column section design
Composite Beam Design Section
First Floor
Second Floor
Roof
Third Floor
W310X129
Cost Estimation
Bracing
40% Increase
References
• National building code of Canada, 2010 (13th ed.). (2010). Ottawa, Ont.: National Research Council Canada, Institute for Research in Construction.
• Handbook of steel construction (10th ed.). (2014). Willowdale, Ont.: CISC.
• Steel Deck. (n.d.). Retrieved December 3, 2015, from http://www.canam-construction.com/wp¬content/uploads/2014/12/canam-steel-deck-catalogue-canada.pdf
• National building code of Canada, 2010 (13th ed.). (2010). Ottawa, Ont.: National Research Council Canada, Institute for Research in Construction.
• Concrete Design Handbook (3rd ed.). (2005). Ottawa: Canadian Portland Cement Association.
• Handbook of steel construction (10th ed.). (2014). Willowdale, Ont.: CISC.
• Toronto Lands Corporation. (n.d.). Retrieved October 7, 2015.
• Advantages of Steel and Steel Framing Construction. (n.d.). Retrieved October 8, 2015, from http://midcitysteel.com/advantages-of-steel-and-steel-framing-construction/
• Concrete vs. Steel. (2005, June 1). Retrieved October 8, 2015, from http://www.buildings.com/article-details/articleid/2511/title/concrete-vs-steel.aspx
• Retrieved November 26, 2015, from http://www.taylorsmyth.com/wp-content/uploads/2014/12/LawrenceandMidland_1.jpg
• Retrieved November 26, 2015, from http://www.taylorsmyth.com/wp-content/uploads/2014/12/LawrenceandMidland_1.jpg
• (Smith, Lawrence Midland Secondary School, 2013)
• Retrieved November 26, 2015, from http://www.geologyontario.mndm.gov.on.ca/mndmfiles/pub/data/imaging/P2204/p2204.pdf
• Baddoo, N. Sustainable Duplex Stainless Steel Bridges. Retrieved November 26, 2015, from http://www.worldstainless.org/Files/issf/non-image-files/PDF/Sustainable_Duplex_Stainless_Steel_Bridges.pdf
• Toronto Lands Corporation. (n.d.). Retrieved October 7, 2015. Google Maps. (n.d.). Retrieved October 7, 2015. Picture: Given PDF from client.
• Advantages of Steel and Steel Framing Construction. (n.d.). Retrieved October 8, 2015, from http://midcitysteel.com/advantages-of-steel-and-steel-framing-construction/
• Concrete vs. Steel. (2005, June 1). Retrieved October 8, 2015, from http://www.buildings.com/article-details/articleid/2511/title/concrete-vs-steel.aspx
• Adluri, S. Faculty of Engineering and Applied Science, Memorial Univeristy. 2010.
• Steel Deck. (n.d.). Retrieved December 3, 2015, from http://www.canam-construction.com/wp-content/uploads/2014/12/canam-steel-deck-catalogue-canada.pdf
• Sustainability. (n.d.). Retrieved November 29, 2015, from http://www.worldsteel.org/steel-by-topic/sustainable-steel.html
• Thermal Mass in Buildings. (n.d.). Retrieved December 1, 2015, from http://www.reidsteel.com/thermal-mass-in-buildings.htm
Thank You!