Numerical Methods in Civil Engineering
مجله روشهای عددی در مهندسی عمران
NMCE
Engineering & Technology
http://nmce.kntu.ac.ir
1
admin
2345-4296
10
8
10.29252/nmce
14
8888
13
en
jalali
1398
9
1
gregorian
2019
12
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4
2
online
1
fulltext
en
A New Method for Estimating the Input-Energy of MDOF Structures
عمومى
General
پژوهشي
Research
<em>Input-energy is the amount of energy that is imposed by an earthquake on a structure and its correlation with structural damage has been studied and demonstrated by many researchers. Since studies concerning seismic energy in multi-degree-of-freedom systems are relatively limited compared with single-degree-of-freedom, in this paper, firstly a theoretical exact method is discussed to calculate the input-energy of the multi-degree-of-freedom elastic oscillators. It is proved that unlike the general rule in mechanics, the superposition theorem is valid for input-energy in conventional modal analysis. To estimate the input-energy, an approach based on PHSA to predict the Fourier amplitude spectrum, is proposed. The results indicate that the modal mass ratio is not the only decisive parameter in input-energy. Modal input-energy decomposition also confirms the possibility of greater input-energy of higher modes in comparison with fundamental ones or the ones with the higher mass participation ratio, especially for tall buildings located in the near-field seismic zones.</em>
Input-Energy of MDOF structures, Modal analysis, Fourier Amplitude spectrum, McGuire attenuation model
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http://nmce.kntu.ac.ir/browse.php?a_code=A-10-1-75&slc_lang=en&sid=1
D.
Davarnia
Daniel.Davarnia@tabrizu.ac.ir
`1003194753284600966`

1003194753284600966
Yes
PhD, University of Tabriz, Tabriz, Iran.
B.
Farahmand Azar
`1003194753284600967`

1003194753284600967
No
Associate Professor, University of Tabriz, Tabriz, Iran.