000009613 001__ 9613
000009613 005__ 20141205150223.0
000009613 04107 $$aeng
000009613 046__ $$k2008-10-12
000009613 100__ $$aCampos Costa, Alfredo
000009613 24500 $$aSeismic Zonation for Portuguese National Annex of Eurocode 8

000009613 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009613 260__ $$b
000009613 506__ $$arestricted
000009613 520__ $$2eng$$aThe development of the Portuguese National Annexes of Eurocode 8 required the definition of a seismic zonation for Portugal. The goal of this paper is to present the applied methodology to perform the Probabilistic Seismic Hazard Analysis (PSHA) and to obtain seismic zonation for Portugal Mainland, Azores and Madeira Archipelagos. Similarly to the Portuguese code presently enforce (RSA, 1983), two scenarios were considered in PSHA computation: (i) a scenario labeled seismic action 1, characterizing earthquakes with their epicenters mainly offshore and (ii) a scenario labeled seismic action 2, referring to events with their epicenters mainly inland. The model of gross-source zones and the parameters defining seismic occurrence process in each source zone, like the Poissonian process and the exponential distribution of magnitudes, was adapted from Sousa (1996). Two different spectral attenuation laws were applied, consistent with the two above mentioned seismic scenarios, namely: (i) a recent regional attenuation law derived for Portuguese seismotectonic environment, based on a finite fault non-stationary stochastic seismological model calibrated for the region (Carvalho et al., 2008), valid for seismic action 1 and (ii) the Ambraseys et al. (1996) model, valid for seismic action 2. The PSHA was performed for all Portuguese counties and for the 475 years return period. The correspondent hazard map was used as the basis for seismic zonation. Portuguese counties were sorted according to their Housner intensity, which was used as a criterion to classify each county in a pre-defined number of seismic zones.

000009613 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009613 653__ $$aAzores, Eurocode 8, National Annex, Portugal, Seismic zonation, Seismic hazard

000009613 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009613 720__ $$aCampos Costa, Alfredo$$iSousa, M. Luísa$$iCarvalho, Alexandra
000009613 8560_ $$ffischerc@itam.cas.cz
000009613 8564_ $$s1026657$$uhttps://invenio.itam.cas.cz/record/9613/files/07-0167.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 07-0167.
000009613 962__ $$r9324
000009613 980__ $$aPAPER