000018858 001__ 18858
000018858 005__ 20170118182244.0
000018858 04107 $$aeng
000018858 046__ $$k2017-01-09
000018858 100__ $$aMavroeidis, George
000018858 24500 $$aImportance of Permanent Ground Displacement on the Dynamic Response of a Bridge Crossing a Fault Rupture Zone

000018858 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018858 260__ $$b
000018858 506__ $$arestricted
000018858 520__ $$2eng$$aThe effect of high-pass filtering on near-fault ground motion records is to completely eliminate the permanent ground displacement and significantly reduce the dynamic ground displacement. This may considerably influence the calculated seismic response of a spatially extended engineering structure crossing a fault rupture zone. To demonstrate the importance of incorporating permanent ground displacements in the analysis and design of extended structures under specific fault crossing conditions, the dynamic response of a seismically isolated bridge located in the vicinity of a surface fault rupture (“Case A”) or crossing a fault rupture zone (“Case B”) is calculated by utilizing a near-fault ground motion record processed with and without a displacement offset. The seismically isolated bridge considered in this study is a 10-span continuous structure supported by 11 piers, resembling a typical segment of the 2.3 km long Bolu Viaduct 1 located in westcentral Turkey. The Lucerne Valley record from the 1992 Mw 7.2 Landers earthquake, which preserves a permanent ground displacement in the fault-parallel direction and exhibits a large velocity pulse in the fault-normal direction, is used as the basis for investigating the effect of high-pass filtering on the dynamic response of the bridge. For the seismically isolated bridge located in the vicinity of the surface fault rupture (“Case A”), the utilization of the high-pass filtered ground motion leads to underestimating the demands of pier top, pier bottom and deck displacements. However, the demands of isolation displacement, isolation permanent displacement and pier drift – quantities associated predominantly with the dynamic response of the bridge – are almost identical for both the unfiltered and filtered versions of the ground motion record. On the other hand, for the seismically isolated bridge traversed by a fault rupture zone (“Case B”), all response quantities are significantly underestimated when the high-pass filtered ground motion is used. These results, though limited to a single bridge structure and a single ground motion input, clearly indicate the importance of permanent ground displacement on the dynamic response of spatially extended engineering structures crossing fault rupture zones.

000018858 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018858 653__ $$abridge; seismic isolation; fault crossing; permanent ground displacement; high-pass filtering

000018858 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018858 720__ $$aMavroeidis, George$$iUcak, Alper$$iTsopelas, Panos$$iYang, Shuo
000018858 8560_ $$ffischerc@itam.cas.cz
000018858 8564_ $$s1596030$$uhttps://invenio.itam.cas.cz/record/18858/files/2363.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2363.
000018858 962__ $$r16048
000018858 980__ $$aPAPER