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    Wind Load Calculation - Example

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    aditarian .p
    The document outlines the steps to calculate wind load on a building according to Indonesian standard SNI1727:2013. It involves determining the building risk category, base wind velocity, wind load parameters, velocity exposure coefficient, wind pressure, minimum wind load, and final wind pressure values. The building is Risk Category IV with a base wind velocity of 50 m/s. Various exposure factors and pressure coefficients are calculated and applied to determine wall and roof wind pressures.

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    Wind Load Calculation - Example

    Uploaded by

    aditarian .p
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    The document outlines the steps to calculate wind load on a building according to Indonesian standard SNI1727:2013. It involves determining the building risk category, base wind velocity, wind load parameters, velocity exposure coefficient, wind pressure, minimum wind load, and final wind pressure values. The building is Risk Category IV with a base wind velocity of 50 m/s. Various exposure factors and pressure coefficients are calculated and applied to determine wall and roof wind pressures.

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    The document outlines the steps to calculate wind load on a building according to Indonesian standard SNI1727:2013. It involves determining the building risk category, base wind velocity, wind load parameters, velocity exposure coefficient, wind pressure, minimum wind load, and final wind pressure values. The building is Risk Category IV with a base wind velocity of 50 m/s. Various exposure factors and pressure coefficients are calculated and applied to determine wall and roof wind pressures.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    30 views8 pages

    Wind Load Calculation - Example

    Uploaded by

    aditarian .p
    The document outlines the steps to calculate wind load on a building according to Indonesian standard SNI1727:2013. It involves determining the building risk category, base wind velocity, wind load parameters, velocity exposure coefficient, wind pressure, minimum wind load, and final wind pressure values. The building is Risk Category IV with a base wind velocity of 50 m/s. Various exposure factors and pressure coefficients are calculated and applied to determine wall and roof wind pressures.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
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    The document discusses the process and parameters for calculating wind load on buildings based on Indonesian code SNI1727:2013.

    The steps involve determining the building risk category, base wind velocity, wind load parameters, velocity exposure pressure coefficient, velocity pressure, external pressure coefficient, wind pressure, minimum wind load, and summarizing the calculation.

    The factors considered include wind direction factor, exposure category, topography factor, wind blow effect factor, closed classification, internal pressure coefficient, velocity exposure pressure coefficient, external pressure coefficient.

    Wind Load Calculation Example

    Code : SNI1727:2013—“Minimum Load for Building Design and Other Structure”


    1. Building Risk Category (Section 1.2.1)
    Building Risk Category: IV

    2. Base Wind Velocity (V)


    V= 50 m/s (180km/h) -> Pilih sesuai kebutuhan (biasanya 50 km/h s/d 120 km/h)
    3. Wind Load Parameter
    a. Wind Direction Factor (Kd) (Section 26.6)

    Kd = 0.85

    b. Exposure Category (Section 26.7)


    Surface Stiffness =D

    Exposure Category =D
    c. Topography Factor (Kzt) (Section 26.8)

    Kzt = 1.0 (Location not surrounded by cliff and hill)

    d. Wind Blow Effect Factor (G) (Section 26.9)

    G= 0.85 (Rigid building)


    e. Closed Calssification (Section 26.10)
    Closed Calssification= Closed

    f. Internal Pressure Coefisien (GCpi) (Section 26.11)


    GCpi= +0.18 and -0.18

    4. Velocity Exposure Pressure Coefficient (Kz) (Section 27.3.1)

    h= 10.44 m

    Kz = 1.19 (interpolation)
    5. Velocity Pressure (Section 27.3.2)

    qz= 1550.12 N/m2


    qh= 1550.12 N/m2 (same as qz, because sroof slope 1.19o/ almost flat)
    6. External Pressure Coefficient
    B = 168.55 m
    L = 67.06 m
    L/B = 0.398
    Cp = 0.8 (For Wall-wind’s side came)
    Cp = -0.5 (For Wall- wind’s side away)

    alpha = 1.19 o

    H/L = 10.44/67.06 = 0.155


    Cp = -0.9 ; -0.18 (For Roof)
    7. Wind Pressure
    For Wall:
    P= 775.06 N/m2 (wind’s side came)
    P= -379.78 N/m2 (wind’s side away)
    For Roof:
    P= - N/m2 (wind’s side came, and wind load base code is always wind’s side away)
    P= -906.82 N/m2 (wind’s side away)

    8. Minimum Wind Load


    Pmin=770 N/m2

    9. Wind Pressure
    For Wall:
    P= 775.06 N/m2 (wind’s side came)
    P= -770.00 N/m2 (wind’s side away)

    For Roof:
    P= - N/m2 (wind’s side came, and wind load base code is always wind’s side away)
    P= -906.82 N/m2 (wind’s side away)

    10. Summary Wind Load Calculation


    Summary Wind
    Load Calculation--
    SNI1727:2013
    Parameter Value Units Reference
    Risk Category= IV Section 1.2.1
    Base Wind Velocity (V)= 50.00 m/s
    Summary Wind
    Load Calculation--
    SNI1727:2013
    Parameter Value Units Reference
    Wind Load
    Parameter=
    Wind Direction Factor (Kd)= 0.85 Section 26.6
    Exposure Category= D Section 26.7
    Topografi Factor (Kzt)= 1 Section 26.8
    Wind Blow Effect Factor (G)= 0.85 9Section 26.8
    Closed Factor = Closed Section 26.10
    Internal Pressure Coefisien(GCpi)= 0.18 Section 26.11
    Velocity Exposure
    Pressure Coefisien
    k z= 1.19 Section 27.3.1
    Velocity Pressure
    qz= 1550.12 N/m2 Section 27.3.2
    qh= 1550.12 N/m2 Section 27.3.2
    External Pressure
    Coefisien
    For Wall Side
    CP= 0.8 Section 27.3.2
    CP= -0.5 Section 27.3.2
    For Roof Side
    CP= -0.9 Section 27.3.2
    CP= -0.18 Section 27.3.2
    Calcuated Wind
    Pressure (p)=q Gf Cp -
    qi(G Cpi)
    For Wall Side
    P= 775.06 N/m2 Section 27.3.2
    P= -379.78 N/m2 Section 27.3.2
    For Roof Side
    P= -906.82 N/m2 Section 27.3.2
    P= 41.85 N/m2 Section 27.3.2
    Minimum Wind Pressure (pmin)= 770 N/m 2
    Section 27.1.5
    Used Wind Pressure
    (p)=q Gf Cp - qi(G
    Cpi)
    For Wall Side
    P= 775.06 N/m2 Section 27.3.2
    2
    P= -770.00 N/m Section 27.3.2
    For Roof Side
    P= -906.82 N/m2 Section 27.3.2
    2
    P= -770.00 N/m Section 27.3.2

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