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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
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
Location of the Low Rise Buildings
Location of the High Rise Buildings
Low RiseElevation Views
High RiseElevation Views
Directional Procedure:◦ Part 1: All Heights◦ Part 2: Simplified h<160 ft
Envelope Procedure Wind Tunnel Procedure
ASCE 7-10 Methods
Low Rise Wind Pressure Distribution
High Rise Wind Pressure Distribution
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
Static Procedure Dynamic procedure Experimental procedure
Canadian Code Wind Calculation Procedure
Building Basic Characteristics:• H/W < 4.• No susceptible vibrations.• H ≤ 20m.
Low Rise Wind Load Calculation
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
Determination of external wind pressure Pe = IwqCeCgCp
Determination of internal wind pressure Pi = IwqCeCiCi
Low Rise Static Procedure – Wind Pressures Structural Components and Cladding
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
Determination of external wind pressure Pe = IwqCeCgCp
Low Rise Static Procedure – Wind Pressures on Building Structure
Low Rise Wind Load Distribution
Building Basic Characteristics• High rise H > 20m.• No susceptible vibrations.• H/W < 4.
High Rise Wind Load Calculation
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
Determination of external wind pressure Pe = IwqCeCgCp
Determination of internal wind pressure Pi = IwqCeCiCi
High Rise Static Procedure – Wind Pressures Structural Components and Cladding
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
Determination of external wind pressure Pe = IwqCeCgCp
High Rise Static Procedure – Wind Pressures on Building Structure
High Rise Wind Load Distribution
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