000010043 001__ 10043
000010043 005__ 20141205154140.0
000010043 04107 $$aeng
000010043 046__ $$k2008-10-12
000010043 100__ $$aGarcía-Pérez, Jaime
000010043 24500 $$aVariations in Optimum Seismic Design Parameters of Important Structures

000010043 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010043 260__ $$b
000010043 506__ $$arestricted
000010043 520__ $$2eng$$aThe paper studies how the seismic design coefficient increment for important structures vary according to different concepts such as peak ground saturation, initial costs, structural capacity, and uncertainties in different variables. Optimum values are obtained on the frame of the total cost design criterion. Sites in the near-field and away from the source are under study to determine the variation of the optimum coefficients. We consider that the design is such that it minimizes the expected present value of the total cost, including initial and maintenance costs as well as losses due to damage and failure. As a first approach we assume that the incremental factor in the design parameter of important structures, at one of the sites, is optimum; after that we compute the corresponding factor for the other site. The earthquake generation process used here is composed of background activity as well as characteristic earthquakes, with both constant and time dependent magnitudes. For the site located in the near-field a saturation phenomenon is considered in the peak ground acceleration as the magnitude of the earthquake increases. This phenomenon, together with the initial costs of structures as well as uncertainties in some parameters are taken into account in order to see their influence on the optimal design values, and on the incremental factor at the different sites studied. The influence is measured by comparing the variations in the total costs. Variations in the optimum seismic design values and on the incremental factor for important structures are studied for sites with different seismicity. Preliminary results show that these factors can vary according to the site seismicity, and that their increment when uncertainties in some variables are taken into account, is appreciable.

000010043 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010043 653__ $$aImportant structures, optimization, total cost, expected present values.

000010043 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010043 720__ $$aGarcía-Pérez, Jaime$$iDíaz-López, Orlando
000010043 8560_ $$ffischerc@itam.cas.cz
000010043 8564_ $$s368734$$uhttps://invenio.itam.cas.cz/record/10043/files/07-0019.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 07-0019.
000010043 962__ $$r9324
000010043 980__ $$aPAPER