The problem of maximum bending moment in towers
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For checking the maximum bending moment in the tower section, the formula uses **bending moment + 0.25 times the wind-induced bending moment + eccentric bending moment». I would like to ask the experts why 0.25 is used as the coefficient for the wind-induced bending moment in this formula?
The calculation of the maximum bending moment of the tower is the larger of the two formulas. The first formula does not take into account the impact because the probability of the design intensity occurring during a 30-year once-in-a-lifetime storm is very low ； In the second formula, although the probability of a 30-year-once strong wind occurring simultaneously with the design seismic intensity is very low, it is entirely possible for weaker winds to blow; therefore, 0.25 times the wind-induced bending moment is taken and added to the ** bending moment. (Excerpt)