000009992 001__ 9992
000009992 005__ 20141205154136.0
000009992 04107 $$aeng
000009992 046__ $$k2008-10-12
000009992 100__ $$aFerrer, Ignacio
000009992 24500 $$aOn the Fitting of Multimodal Intensity Functions to Complex Accelerograms

000009992 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009992 260__ $$b
000009992 506__ $$arestricted
000009992 520__ $$2eng$$aThe estimation of the intensity function of an earthquake record is a key step for the non-stationary stochastic representation of seismic action in dynamic structural analyses. In spite of its importance, only a few procedures have been applied to obtain the intensity function of a given earthquake record. Amongst them, the underlying stationary process (USP) method, proposed by Ferrer and Sánchez-Carratalá (2006), is the only procedure that can be considered as a standard method for earthquake analysis, since it can be systematically applied to fit any prescribed intensity function to any real record. Furthermore, it allows the quantitative assessment of the fitting by using some error parameter calculated from the underlying process. The USP method has been extensively applied to many accelerograms from several seismic regions using common unimodal theoretical or code-based intensity functions. However, these unimodal functions only attempt to model the amplitude evolution over the time of seismic events caused by a singular and instantaneous rupture process. The analysis of complex accelerograms, with two or more separate peaks produced by several fault ruptures or very different wave paths, can be accomplished by the composition of two or more single-peak intensity functions. In the present paper, the standard USP method is extended to solve the problem of fitting the amplitude modulation function of multimodal accelerograms. A numerical application of the proposed method to some real multimodal earthquake records is carried out, showing the ability of the USP method to accurately obtain the amplitude modulation function of complex accelerograms.

000009992 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009992 653__ $$aearthquake record, intensity function, amplitude modulation function, multimodal accelerogram, non-stationary stochastic process, USP method

000009992 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009992 720__ $$aFerrer, Ignacio$$iSánchez-Carratalá, Carlos R.
000009992 8560_ $$ffischerc@itam.cas.cz
000009992 8564_ $$s153698$$uhttps://invenio.itam.cas.cz/record/9992/files/02-0056.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 02-0056.
000009992 962__ $$r9324
000009992 980__ $$aPAPER