000019197 001__ 19197
000019197 005__ 20170118182304.0
000019197 04107 $$aeng
000019197 046__ $$k2017-01-09
000019197 100__ $$aShrimali, M K
000019197 24500 $$aBehaviour of Base Isolated Buildings Subjected To Near Field Earthquakes

000019197 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019197 260__ $$b
000019197 506__ $$arestricted
000019197 520__ $$2eng$$aMost of the base-isolated buildings are designed and tested for design basis far-field ground motion. This leaves a scope for investigation of seismic vulnerability of bases isolated buildings under near-field effects. Typically a near-field earthquake is identified as large amplitude, low frequency, short duration, a pulse type ground motion known for its high damage potential and ductility demand due to its whiplash effect. The present study seeks to investigate the effectiveness of base isolation system for seismic hazard mitigation of buildings, especially under near-field effects. For the study response, history analysis is carried out for a ten storey building frame, both fixed base and isolated, subjected to near-field ground motions, and the same structure is also subjected to a set of far-field ground motions. Two levels of earthquakes are used i.e. design level (scaled to have PGA = 0.2g) and extream level (scaled to have PGA = 0.4g). The selected response parameters for the comparative study are peak values of floor displacement, acceleration and base shear. The result of the study highlights that (i) for the two levels of PGA of earthquake considered in the study, the results in base shear, top floor absolute acceleration and maximum storey drift are significant for far-field earthquake and near-field earthquake with directivity effect, (ii) for the near-field earthquake with fling step effect, percentage reduction in the above response quantities is considerably reduced indicating that the base isolation proved to be ineffective for this type of near-field earthquake, (iii) the time history of the top storey displacement for near-field earthquake with fling step effect is distinctively different than those for other earthquakes and (iv) force-deformation loop of the isolator differ widely with earthquakes, for the near-field earthquake with fling step effect. The hysteresis curve is narrow with large displacement especially for the higher level of PGA.

000019197 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019197 653__ $$aFar field earthqukae, Near-field earthquake, Base isolation, inelastic deformation, Base isolated structure

000019197 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019197 720__ $$aShrimali, M K$$iBharti, Sd$$iK, Datta T$$iBhandari, Mohit
000019197 8560_ $$ffischerc@itam.cas.cz
000019197 8564_ $$s557289$$uhttps://invenio.itam.cas.cz/record/19197/files/3072.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3072.
000019197 962__ $$r16048
000019197 980__ $$aPAPER