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BLDG 6071 - PROJECT - SUMMER 2011
Comparison of the American and Canadian Methods of Wind Load
Calculations for Low-Rise and High-Rise (Tall) BuildingsWind Engineering and Building Aerodynamics
By: Mohamad Meneeim ID#: 6175163Sherif Hafez ID#: 9787143
Professor: Dr. T. Stathopoulos
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The purpose of this project is to determine the similarities and differences in the American and Canadian methods of wind load calculations using the appropriate guidelines and the available procedures for each case.
Purpose
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Location of the Low Rise Buildings
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Location of the High Rise Buildings
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Low RiseElevation Views
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High RiseElevation Views
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Directional Procedure:◦ Part 1: All Heights◦ Part 2: Simplified h<160 ft
Envelope Procedure Wind Tunnel Procedure
ASCE 7-10 Methods
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Low Rise Wind Pressure Distribution
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High Rise Wind Pressure Distribution
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Without converting 3-sec gust to 1-hour mean speed:
◦ VAmerican Code = 2.00 VCanadian code ◦ V2
American Code= 4.00 V2Canadian Code
Converting 3-sec gust to 1-hour mean:◦ VAmerican Code = 1.38 VCanadian code ◦ V2
American Code= 1.69 V2Canadian Code
Comparison
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Static Procedure Dynamic procedure Experimental procedure
Canadian Code Wind Calculation Procedure
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Building Basic Characteristics:• H/W < 4.• No susceptible vibrations.• H ≤ 20m.
Low Rise Wind Load Calculation
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Determination of the importance factor Iw Calculating Reference Velocity Pressure q Calculating the Exposure Factor Ce Verified H ≤ 20 – low rise Calculating CpCg on different structural
components and cladding. Calculating Cgi Calculating Cpi
Low Rise Static Procedure – Wind Pressures Structural Components and Cladding
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Determination of external wind pressure Pe = IwqCeCgCp
Determination of internal wind pressure Pi = IwqCeCiCi
Low Rise Static Procedure – Wind Pressures Structural Components and Cladding
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Verified H ≤ 120, H/W ≤ 4, and no susceptible to vibrations.
Calculating the Exposure Factor Ce Verified H ≤ 20 m, and H/Ds < 1 Calculating CpCg in different wind directions. Determination of wind external pressure Pe
Low Rise Static Procedure – Wind Pressures on Building Structure
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Determination of external wind pressure Pe = IwqCeCgCp
Low Rise Static Procedure – Wind Pressures on Building Structure
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Low Rise Wind Load Distribution
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Building Basic Characteristics• High rise H > 20m.• No susceptible vibrations.• H/W < 4.
High Rise Wind Load Calculation
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Determination of the importance factor Iw Calculating Reference Velocity Pressure q Calculating the Exposure Factor Ce Verified H > 20 – High rise Calculating CpCg on different structural
components and cladding. Calculating Cgi Calculating Cpi
High Rise Static Procedure – Wind Pressures Structural Components and Cladding
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Determination of external wind pressure Pe = IwqCeCgCp
Determination of internal wind pressure Pi = IwqCeCiCi
High Rise Static Procedure – Wind Pressures Structural Components and Cladding
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Verified H ≤ 120, H/W ≤ 4, and no susceptible to vibrations.
Calculating the Exposure Factor Ce Verified H > 20 m, and H/Ds > 1 Determining Cg . it is 2.0 in our case
because it is a flat terrain. Determining Cp. Determination of wind external pressure Pe
High Rise Static Procedure – Wind Pressures on Building Structure
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Determination of external wind pressure Pe = IwqCeCgCp
High Rise Static Procedure – Wind Pressures on Building Structure
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High Rise Wind Load Distribution