000020240 001__ 20240
000020240 005__ 20170118182401.0
000020240 04107 $$aeng
000020240 046__ $$k2017-01-09
000020240 100__ $$aChiou, Ding-Je
000020240 24500 $$aVariation in Seismic Performance of Bridges Caused By Riverbed Scour

000020240 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020240 260__ $$b
000020240 506__ $$arestricted
000020240 520__ $$2eng$$aThis paper applies the capacity spectrum approach to evaluate the seismic performance of a bridge at different scour depths. The capacity spectrum is constructed based on the lateral pushover curve obtained from finite element analysis. During the pushover process, the forces applied on the superstructure and the pile-cap are assessed by the modal analysis of a bridge bent; these forces are adjusted after reaching the yield limit states of the structure to account for the effect of stiffness change. The performance limit of the bridge is identified in the capacity spectrum, and the seismic demand required to reach this performance limit is determined accordingly. The influence of riverbed scour on the seismic performance of a bridge is assessed by comparing the seismic demands correlated to the performance limit at different scour depths. Results highlight that for a bridge originally equipped with sufficient foundation strength, the seismic demand correlated to its performance limit first increases with increasing scour depth. This result indicates an improved seismic performance when the scour depth is shallow. Once the scour depth exceeds a critical level, the seismic performance of the bridge is controlled by the unexpected damages in the foundation. The seismic demand correlated to the performance limit of the bridge decreases, and the seismic performance declines rapidly when the scour depth increases.

000020240 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020240 653__ $$abridge; multiple hazards; soil-structure interaction; capacity spectrum approach; river scour

000020240 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020240 720__ $$aChiou, Ding-Je$$iHu, Tzu-Fan$$iSong, Shin-Tai
000020240 8560_ $$ffischerc@itam.cas.cz
000020240 8564_ $$s427683$$uhttps://invenio.itam.cas.cz/record/20240/files/81.pdf$$yOriginal version of the author's contribution as presented on USB, paper 81.
000020240 962__ $$r16048
000020240 980__ $$aPAPER