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Height of wind (h0)
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Height of wind load defined by the user.. |
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Height (h)
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Total Superstructure/Substructure height. |
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Natural-vibration frequency (f1)
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Defined in Table 11.5 from SP 20.13330.2011 for each wind area. |
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Load safety factor (gammaf)
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Default value is 1,4 - taken from 11.1.12 in SP 20.13330.2011. |
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Dynamic coefficient(ksi)
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For non-continuous bridges - value is taken from SP 20.13330.2011, chapter 11.1.8, Picture 11.1 (depending on parameters: delta and epsilon - described bellow). For continuous bridges - equal to 1,2.
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Aerodynamic coefficient(cw)
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User input. Aerodynamic coefficient available in Appendix H table of SP 35.13330.2011 - depending on structure type.
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Oscillation parameter (delta)
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User input. Default value is 0.3 for Concrete and Composite bridges.
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Parameter (eps)
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Automatically calculated with the formula: eps = (√(Wo × K × gammaf) / 940 × f1 ). |
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Mean wind part (wm)
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Automatically calculated with the formula: wm = Wo × k × Cw. |
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Oscillatory wind part (wp)
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Automatically calculated with the formula: wp = wm × ksi × L × v.
| L × v = 0.55 - 0.15 x lambda / 100 ≥ 0.30 | |
where| lambda | = | the length of span or height of pier, in meters |
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Characteristic wind (wn)
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Automatically calculated with the formula: wn = wm + wp |
