ESDU 88019
Calculation methods for alongwind loading. Part 3. Response of buildings and platelike structures to atmospheric turbulence.
Abstract:
ESDU 88019 provides a stepbystep calculation method for the loading, accelerations and deflections of buildings and platelike structures. The loading is derived as the sum of a mean component together with background and resonant fluctuating components. Precalculated loading factors, based on the wind models in the Series, are included in graphical and equation form for estimation of the fluctuating components. Load/velocity admittance factors, which make allowance for the distortion of turbulence by the presence of the structure, are also included. The input data necessary are discussed and, where appropriate, approximate values are provided. A calculation sheet for the method is included and its use illustrated with a worked example. ESDU 92036 provides computer programs for this method, and for the similar method applied to linelike structures in ESDU 87035.Indexed under:
 Bending Moment
 Damping Ratio
 Normal Mode Analysis
 Response of Buildings and Structures
 Response of Buildings and Structures To Atmospheric Turbulence
 Roughness
 Terrain Roughness
 Turbulence Near Ground
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Data Item ESDU 88019  

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This Data Item contains 28 interactive graph(s) as listed below.
Graph  Title 

Figure 1  Mean wind speed factor K^{2}_{V} for wind speed profiles over uniform terrain 
Figure 2a  Normalised background loading factor for β = 1.0 and displacement and accelleration response 
Figure 2b  Normalised background loading factor for vertical cantilever influence function components 
Figure 2c  Normalised background loading factor for horizontal cantilever influence function components 
Figure 2d  Normalised background loading factor for singlespan influence function components 
Figure 2e  Normalised background loading factor for horizontal, twospan, bridgetype influence function components 
Figure 2f  Normalised background loading factor for torsional moment, horizontal influence function components 
Figure 2g Part 1  Normalised background loading factor for torsional moment, vertical influence function components 
Figure 2g Part 2  Normalised background loading factor for torsional moment, vertical influence function components 
Figure 2g Part 3  Normalised background loading factor for torsional moment, vertical influence function components 
Figure 2g Part 4  Normalised background loading factor for torsional moment, vertical influence function components 
Figure 3a  Normalised resonant loading factor for cantilever, first mode, components 
Figure 3b  Normalised resonant loading factor for vertical cantilever, second mode, components 
Figure 3c  Normalised resonant loading factor for horizontal cantilever, second mode, components 
Figure 3d  Normalised resonant loading factor for singlespan, firstmode, components 
Figure 3e  Normalised resonant loading factor for singlespan, second mode and twospan, bridgetype first mode, components 
Figure 3f  Normalised resonant loading factor for horizontal, torsional mode, components 
Figure 3g Part 1  Normalised resonant loading factor for vertical, torsional mode, components 
Figure 3g Part 2  Normalised resonant loading factor for vertical, torsional mode, components 
Figure 3h  Normalised resonant loading factor for uniform displacement component, μ_{j} = 1.0 
Figure 4  Normalised spectral function for alongwind component of turbulence 
Figure 5  Load/velocity admittance factor for background component of response 
Figure 6a  B^{2}_{R1} component of load/velocity admittance factor for resonant components of response 
Figure 6b Part 1  B^{2}_{R2} component of load/velocity admittance factor for resonant components of response 
Figure 6b Part 2  B^{2}_{R2} component of load/velocity admittance factor for resonant components of response 
Figure 7b  Aerodynamic damping factor components  cantilever, first mode, components 
Figure 7c  Aerodynamic damping factor components  cantilever, second mode, components 
Figure 7g  Aerodynamic damping factor components  torsional mode components 
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