ESDU 87035: Along-wind response of line-like structures to atmospheric turbulence.

Abstract:

ESDU 87035 provides a step-by-step calculation procedure for the loading, accelerations and deflections of line-like structures such as bridges, masts and towers, or structural elements such as beams or columns which can be fixed at either one or both ends. 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 model in the Series, are included in graphical and equation form for estimation of the fluctuating components. 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. Comparisons are made with results obtained using the superseded method of ESDU 76001, which is found to have been slightly optimistic. See ESDU 92036 for a computer program of the method presented here.

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Details:

Data Item ESDU 87035
Format:	PDF with interactive graphs
Status:	Re-issue (1), 01 Feb 2012 Published in Release 2012-03 (Mar 2012)
Previous Releases:	ESDU 87035 Amendment B
ISBN:	978 0 85679 628 9

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This Data Item contains 17 interactive graph(s) as listed below.

Graph	Title
Figure 1	Mean wind speed factor, K²_V
Figure 2a	Normalised background loading factor for all structures, displacement response only
Figure 2b	Normalised background loading factor for vertical cantilever structures
Figure 2c	Normalised background loading factor for horizontal cantilever structures
Figure 2d	Normalised background loading factor for structural members
Figure 2e	Normalised background loading factor for horizontal, two-span, bridge-type structures
Figure 2f	Normalised background loading factor for torsional moment, horizontal structures
Figure 3a Part 1	Normalised resonant loading factor for cantilever structures, first mode
Figure 3a Part 2	Normalised resonant loading factor for cantilever structures, first mode
Figure 3b	Normalised resonant loading factor for vertical cantilever structures, second mode
Figure 3c	Normalised resonant loading factor for horizontal cantilever structures, second mode
Figure 3d	Normalised resonant loading factor for structural members
Figure 3e	Normalised resonant loading factor for structural members, second mode and two-span, bridge-type structures
Figure 3f	Normalised resonant loading factor for torsional mode, horizontal structures
Figure 4	Normalised spectral function for along-wind turbulence component
Figure 5	Turbulence admittance factor for background component
Figure 6	Turbulence admittance factor for resonant components

ESDU 87035

Calculation methods for along-wind loading. Part 2. Response of line-like structures to atmospheric turbulence.