Guralp-systems ART Manual do Utilizador descarregar pdf (Página 32)

ART

25. number of absolute effective cycles (peak counting

excluding non-zero crossings) in acceleration time-

history (Hancock & Bommer, 2005);

26. number of equivalent effective cycles using user-

defined damage exponent (peak counting excluding

non-zero crossings) in acceleration time-history

(Hancock & Bommer, 2005);

27. number of absolute effective cycles (rainflow counting

technique) in acceleration time-history (Hancock &

Bommer, 2005);

28. number of equivalent effective cycles using user-

defined damage exponent (rainflow counting

technique) in acceleration time-history (Hancock &

Bommer, 2005);

29. predominant spectral period (or frequency) defined by

Rathje et al. (2004) as the period at which the

maximum spectral acceleration (using user-defined

damping level) occurs;

30. mean period (or frequency) defined by Rathje et al.

(2004) as:

where

are Fourier amplitudes at frequencies

;

31. smoothed predominant spectral period (or frequency)

defined by Rathje et al. (2004) as:

for T

with SA/PGA≥ 1.2 where T

are periods at which

the spectral accelerations SA are defined (using user-

defined damping level);

32 Issue C

∑

 1/ f



∑

[

SAT



PGA

]

∑

[

SAT



PGA

]

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 62 63

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