Seismic response of degrading sdof systems due to near-field ground motions

Dimakopoulou, V; Fragiadakis, M; Spyrakos, C

dc.contributor.author	Dimakopoulou, V	en
dc.contributor.author	Fragiadakis, M	en
dc.contributor.author	Spyrakos, C	en
dc.date.accessioned	2014-03-01T02:53:27Z
dc.date.available	2014-03-01T02:53:27Z
dc.date.issued	2011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36334
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-80054795921&partnerID=40&md5=a963c938da083b7350a5a0c4beb124d1	en
dc.subject	Forward directivity	en
dc.subject	Inelastic displacement ratio	en
dc.subject	Near-fault ground motions	en
dc.subject	Near-source effect	en
dc.subject	Single-degree-of-freedom oscillators	en
dc.subject.other	Directivity	en
dc.subject.other	Inelastic displacement ratios	en
dc.subject.other	Near fault ground motion	en
dc.subject.other	Near-source effect	en
dc.subject.other	Single-degree-of-freedom oscillators	en
dc.subject.other	Civil engineering	en
dc.subject.other	Computational methods	en
dc.subject.other	Earthquakes	en
dc.subject.other	Engineering geology	en
dc.subject.other	Sensitivity analysis	en
dc.subject.other	Structural dynamics	en
dc.subject.other	Seismic response	en
dc.title	Seismic response of degrading sdof systems due to near-field ground motions	en
heal.type	conferenceItem	en
heal.publicationDate	2011	en
heal.abstract	The effect of rupture directivity at near-fault sites is investigated. The study compares the ratio of maximum inelastic to maximum elastic displacement demand, CR, for a wide range of SDOF systems subjected to fault-normal, near-field ground motions. Oscillators with both bilinear and quadrilinear backbones are considered. The quadrilinear oscillators include an elastic, a hardening and a negative stiffness branch that terminates at a horizontal plateau, and therefore this modelling is more suitable for simulating the real-world buildings, which degrade. A sensitivity analysis of the parameters that describe the SDOF systems is performed in order to study their effect on CR. It is demonstrated how the seismic response varies with respect to the backbone parameters, the period and the seismic demand. The results show that the bilinear approximation, which is the common, underestimates the ductility demand compared to the quadrilinear case, regardless of the seismic intensity and the backbone parameters.	en
heal.journalName	ECCOMAS Thematic Conference - COMPDYN 2011: 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering: An IACM Special Interest Conference, Programme	en