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Development of a Risk Consistent Framework for Seismic Qualification of Equipment.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Development of a Risk Consistent Framework for Seismic Qualification of Equipment./
Author:	Chatterjee, Payel.
Description:	1 online resource (207 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
Subject:	Civil engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781369855678

Development of a Risk Consistent Framework for Seismic Qualification of Equipment.
Chatterjee, Payel.

Development of a Risk Consistent Framework for Seismic Qualification of Equipment. - 1 online resource (207 pages)

Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.

Thesis (Ph.D.)--North Carolina State University, 2017.

Includes bibliographical references

IEEE 693 (2005) and IEEE 344 (2004) recommend qualification of equipment either by testing or by analysis depending on the voltage classification in order to ensure a safe shut down of power plants during or after an earthquake. The in-situ conditions at the time of installation such as structural properties and boundary conditions of the mounting arrangements can have a significant effect on the behavior and performance of such equipment. In majority of cases when heavy equipment is mounted on support structures, amplification can be either much less or much high than the recommended value of 2.5, depending on the rigidity of the support structures. The current practice for estimation of In- Structure Response Spectrum (ISRS) uses a decoupled analysis. Such an analysis neglects the effect of dynamic interaction between the equipment and the structure that can lead to significant reduction in the equipment response. For sensitive equipment such as relays and switches, the required response spectra (RRS) are often narrow banded due to filtering of ground motion through the structures on which the equipment may be mounted. Consequently, narrowband RRS are clipped to equivalent broadband spectra for fragility estimation. However, the recommended expressions for the clipping factors are based on excitations that are represented in terms of sine beat type motions and not actual earthquake motions.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369855678Subjects--Topical Terms:

561339
Civil engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Development of a Risk Consistent Framework for Seismic Qualification of Equipment.
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100 1 $a Chatterjee, Payel. $3 1187000
245 1 0 $a Development of a Risk Consistent Framework for Seismic Qualification of Equipment.
264 0 $c 2017
300 $a 1 online resource (207 pages)
336 $a text $b txt $2 rdacontent
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500 $a Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
502 $a Thesis (Ph.D.)--North Carolina State University, 2017.
504 $a Includes bibliographical references
520 $a IEEE 693 (2005) and IEEE 344 (2004) recommend qualification of equipment either by testing or by analysis depending on the voltage classification in order to ensure a safe shut down of power plants during or after an earthquake. The in-situ conditions at the time of installation such as structural properties and boundary conditions of the mounting arrangements can have a significant effect on the behavior and performance of such equipment. In majority of cases when heavy equipment is mounted on support structures, amplification can be either much less or much high than the recommended value of 2.5, depending on the rigidity of the support structures. The current practice for estimation of In- Structure Response Spectrum (ISRS) uses a decoupled analysis. Such an analysis neglects the effect of dynamic interaction between the equipment and the structure that can lead to significant reduction in the equipment response. For sensitive equipment such as relays and switches, the required response spectra (RRS) are often narrow banded due to filtering of ground motion through the structures on which the equipment may be mounted. Consequently, narrowband RRS are clipped to equivalent broadband spectra for fragility estimation. However, the recommended expressions for the clipping factors are based on excitations that are represented in terms of sine beat type motions and not actual earthquake motions.
520 $a In this thesis, closed-form solutions for seismic amplifications of equipment are derived as functions of modal properties. Wherever possible, simplifications are made to these formulations depending on the combinations of mass and frequency ratios. The reduction in the equipment response due to interaction with the supporting structure is also studied for many different multi degree of freedom systems and the uncertainties in the reduction factor are investigated for a suite of mass ratios and damping ratios of the equipment. An attempt is made to estimate statistical bounds for the reduction factor. The effect of non-classical damping is also investigated. In case of equipment qualification based on equivalent broadband spectra, this study attempts to calculate the clipping factors for real earthquakes that are consistent with the site specific Probabilistic Seismic Hazard Analysis (PSHA) requirements. The purpose is to recommend a framework for seismic qualification of equipment that is consistent with Seismic Probabilistic Risk Assessment (SPRA) requirements.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Civil engineering. $3 561339
655 7 $a Electronic books. $2 local $3 554714
690 $a 0543
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a North Carolina State University. $b Civil Engineering. $3 1180817
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10610684 $z click for full text (PQDT)