Study on Elastie Response of Structures to Near.fault GroundMotions Through Record Decomposition
[1]ZHAO Zhihang,CHE Wei,FENG Qun.Study on Elastie Response of Structures to Near.fault GroundMotions Through Record Decomposition[J].Journal of Zhengzhou University (Engineering Science),2012,33(04):18-22.[doi:10.3969/j.issn.1671-6833.2012.04.005]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
33
Number of periods:
2012 04
Page number:
18-22
Column:
Public date:
2012-07-10
- Title:
- Study on Elastie Response of Structures to Near.fault GroundMotions Through Record Decomposition
- Keywords:
- near-fault ground motion; low-frequency pulse ; high-frequency component; moving average filter; elastic response spectra
- CLC:
- P315
- DOI:
- 10.3969/j.issn.1671-6833.2012.04.005
- Abstract:
- The design response spectrum in seismic design code is the result of a large number of midfield andfar-field seismic records statistical regression analysis. As a result of the lack of observation data , the percent olnear-field seismie records is small , which lcads to the insufficient consideration of the frequency spectrumcharacteristic of near field ground motions. Near-fault ground motions have some important characteristie thatmake them different from far-fault ground motions. High-frequency components and low-frequency pulses ofnear-fault ground motions are among notable specifications. In this paper, a moving average filtering has beerdesigned to decompose the near-fault ground molions into two components having different frequeney contents:low-frequency pulses component and high-frequency component, The method is applied to decompose a few selected near-fault records and the elastie response of structure is examined through their response to the decomposed parts. The results emphasizes that for single pulse record the pulse component can effectively representhe response of the structure under the original records . But for multi-pulse record, owing to the existence ofone or more peaks, the pulse component can not efectively represent the structure response under the originalrecords, The sole consideration of the pulse component and ignoring the high frequency component is very badfor short cycle structure.
- References:
- -
- Similar References:
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Last Update:
1900-01-01