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Comparing the adequacy of alternative ground motion intensity measures for the estimation of structural responses
Earthquake engineering & structural dynamics, 2004-07, Vol.33 (8), p.951-979
Giovenale, Paolo
Cornell, C. Allin
Esteva, Luis
2004
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Giovenale, Paolo
Cornell, C. Allin
Esteva, Luis
Titel
Comparing the adequacy of alternative ground motion intensity measures for the estimation of structural responses
Ist Teil von
Earthquake engineering & structural dynamics, 2004-07, Vol.33 (8), p.951-979
Ort / Verlag
Chichester, UK: John Wiley & Sons, Ltd
Erscheinungsjahr
2004
Quelle
Wiley-Blackwell Journals
Beschreibungen/Notizen
Practical methods for the probability‐based seismic assessment of structures make use of estimates of demands produced by earthquakes of different intensities. The uncertainties associated with these estimates are highly dependent on the variable adopted as the intensity measure (IM, e.g., PGA, spectral acceleration, etc.). This generates the need to compare the efficiency of an originally adopted IMwith that of a new candidate. This implies comparing the dispersion of the demand measure (DM, e.g., maximum interstorey drift ratio, ductility demand, etc.) conditional to each of the two IMs. In order to obtain the demand estimates in a conventional way, a full set of dynamic response analyses should be performed for each IM under scrutiny, i.e., multiple records scaled at several fixed values of each IM. The procedure developed here serves to accelerate this comparison avoiding the effort required to evaluate the dynamic responses of the structure for all the ground motion time histories considered every time that a new IM is adopted. For this purpose, use is made of available results of analyses performed for a different (i.e., the original) IM. Two methods are proposed: the direct method involves performing a regression of the results obtained from the original analyses, taking the candidate IM as the independent variable. The indirect method involves rebuilding the probability density function of the DM given a defined value of the candidate IM by means of the total probability theorem, using the results of the original analyses and certain data relating the two IMs. The proposed methods have been tested by application to several SDOF systems with different periods and different cyclic‐response backbone curves. The conditions affecting their approximation are explored, and some criteria to improve them are identified. The procedure can also be used to determine the optimum value of a parameter to be used in a parameter‐based IM. Copyright © 2004 John Wiley & Sons, Ltd.
Sprache
Englisch
Identifikatoren
ISSN: 0098-8847
eISSN: 1096-9845
DOI: 10.1002/eqe.386
Titel-ID: cdi_proquest_miscellaneous_17864701
Format
–
Schlagworte
Earth sciences
,
Earth, ocean, space
,
Earthquakes, seismology
,
Engineering and environment geology. Geothermics
,
Engineering geology
,
Exact sciences and technology
,
ground motion intensity measures
,
Internal geophysics
,
non-linear dynamic analysis
,
performance-based earthquake engineering
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