000018848 001__ 18848
000018848 005__ 20170118182244.0
000018848 04107 $$aeng
000018848 046__ $$k2017-01-09
000018848 100__ $$aGuerrero, Héctor
000018848 24500 $$aStudy on Residual Displacements of Conventional and Dual Structures

000018848 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018848 260__ $$b
000018848 506__ $$arestricted
000018848 520__ $$2eng$$aAlthough damage to structures may be insignificant after an earthquake, the economic impact due to residual displacements (RDs) may be huge. This has recently been highlighted by many research studies. Therefore, this study focuses on the understanding of the parameters affecting RDs in conventional and dual systems (representative of structures equipped with Buckling-Restrained Braces) located in very soft soils. For that purpose, the statistics of the residual displacement demands in conventional and dual SDOF oscillators were investigated when the oscillators were subjected to 220 ground motions recorded on the lakebed zone of Mexico City. The effects of different parameters, such as post-yielding stiffness ratio, period of vibration, strength reduction factor and level of ductility on the responses were studied. It was observed that all these parameters affect the magnitude of the residual displacements. As an example, a positive post-yielding stiffness ratio (r) in conventional structures was found to be very effective in reducing the RDs, while negative values of r were highly detrimental. On the other hand, for dual systems, it was observed that RDs may be small when the primary part remains elastic. However, if the primary part exhibits inelastic deformations, the expected RDs are increased significantly. In this case, the post-yielding stiffness ratio of the secondary part plays a key role while that of the primary part becomes unimportant. Several recommendations are made to mitigate RDs in conventional and dual structures. The results of this study may be applicable to structures whose response is not significantly influenced by higher modes.

000018848 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018848 653__ $$aResidual displacements, dual systems, very soft soils, lakebed zone of Mexico City, post-yielding stiffness ratio.

000018848 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018848 720__ $$aGuerrero, Héctor$$iRuíz-García, Jorge$$iEscobar, J. Alberto$$iGómez, Roberto
000018848 8560_ $$ffischerc@itam.cas.cz
000018848 8564_ $$s183898$$uhttps://invenio.itam.cas.cz/record/18848/files/2344.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2344.
000018848 962__ $$r16048
000018848 980__ $$aPAPER