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Seed record selection for spectral matching with RSPMatch2005

Grant, DN; Greening, PD; Taylor, ML; Ghosh, B; (2008) Seed record selection for spectral matching with RSPMatch2005. In: Proceedings of the 14th World Conference on Earthquake Engineering. : Beijing, China.

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Abstract

A number of design codes and research publications provide guidelines for the selection of seismic ground motions for use in time history analysis. Generally, these documents are based on the use of a number of real recorded ground motions, possibly scaled by a constant factor over the full duration to be approximately consistent with the seismic hazard at the site. Seismological characteristics of the records, such as earthquake magnitude, epicentral distance and duration, should be considered in the selection of real records, as they influence the shape of the response spectrum, and the expected demand on the structural model. The use of spectral-matching software, on the other hand, such as RSPMatch, allows the engineer to alter the raw ground motions across a large range of structural periods to provide a near-exact match of the seismic hazard at the site. A smaller number of spectrally-matched records can be used, as the variability is less. A set of criteria for selecting seed motions for RSPMatch is presented. Initial spectral shape is of primary importance, while ranges of acceptable earthquake magnitudes and epicentral distances proposed in earlier guidelines are relaxed somewhat. For structures with a long fundamental period, the frequency content of the input motion is very important, to avoid excessive manipulation of the record in RSPMatch. Finally, ground motion duration is also considered.

Type:Proceedings paper
Title:Seed record selection for spectral matching with RSPMatch2005
Additional information:keywords: By me, Duration, RspMatch, Spectral matching
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Civil, Environmental and Geomatic Engineering

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