000010069 001__ 10069
000010069 005__ 20141205154141.0
000010069 04107 $$aeng
000010069 046__ $$k2008-10-12
000010069 100__ $$aGhalibafian, Houman
000010069 24500 $$aPerformance-Based Assessment of the Effects of Soil-Structure Interaction on the Seismic Demands of Bridge Piers: a Proposed Methodology

000010069 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010069 260__ $$b
000010069 506__ $$arestricted
000010069 520__ $$2eng$$aA methodology is proposed for simplified estimation of the effects of nonlinear soil-structure interaction (SSI) on the ductility and total displacement demands of bridge piers subjected to earthquake ground motions. The methodology is based on modifying the fixed-base demands by applying SSI Modification Factors that are proposed as functions of the ratio of the flexible-base period to the fixed-base period of the piers (Tsys/T). The proposed modification factors are estimated by using response databases obtained from nonlinear dynamic analyses of prototype SSI systems with various combinations of soil, foundation, and structure properties and input ground motions. The response data is processed probabilistically to account for the uncertainties involved in the system properties, such as the natural period, and the scatter of the results of the nonlinear dynamic analyses. The results are presented for various performance objectives and reliability levels. Thus, the SSI Modification Factors can be selected with various levels of reliability chosen by the engineer. The methodology is explained through an application example where SSI Modification Factors are presented by using response databases from nonlinear dynamic analyses of prototype pile-supported bridge piers with various natural periods of the fixed-base structure and soil layer subjected to an ensemble of ground motions. The application of the proposed methodology is shown to be suitable for implementation in a design code. Finally, the paper discusses merits and limitations of the methodology and the need for further research. KEYWORD:

000010069 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010069 653__ $$a

000010069 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010069 720__ $$aGhalibafian, Houman$$iFoschi, Ricardo O.$$iVentura, Carlos E.
000010069 8560_ $$ffischerc@itam.cas.cz
000010069 8564_ $$s185545$$uhttps://invenio.itam.cas.cz/record/10069/files/05-02-0113.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-02-0113.
000010069 962__ $$r9324
000010069 980__ $$aPAPER