# N

4.6n1B

Rb = 1 ^T"T(1 - e ) for h b > 0 h 2h b Rb = 1, for h b = 0

Rh = — --L(1 - e-2hh ) for hh > 0 hh 2hl Rh = 1 for hh = 0

B = building width perpendicular to wind h = building height

Q = background response, a term used in random vibration theory.

b and a from Table 6.4

b and a from Table 6.4

n1 = natural frequency of the building

Rn is a parameter required for calculating R2

Rb is a parameter required for calculating R2

Rh is a parameter required for calculating R2

15.4n1L

hL 2hL

= modal mass = J mzQz2dz

### Rl is a parameter required for calculating R2

ß = damping ratio, percent of critical gQ = peak factor for background response gR = peak factor for resonance response G = gust factor gV = peak factor for wind response gQ = gV always taken = 3.4

% = mode exponent ln means logarithm to base e = 2.71.

= modal mass = J mzQz2dz

fiz = mass per unit height, slugs/ft h = building height

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