000018765 001__ 18765
000018765 005__ 20170118182240.0
000018765 04107 $$aeng
000018765 046__ $$k2017-01-09
000018765 100__ $$aGarcia, Reyes
000018765 24500 $$aSeismic Performance Evaluation of Coupled Walls Using Innovative Highly Deformable Coupling Beams

000018765 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018765 260__ $$b
000018765 506__ $$arestricted
000018765 520__ $$2eng$$aReinforced concrete (RC) coupled shear walls are commonly used in the design and construction of high rise buildings located in seismic zones to control drifts at upper storeys. When appropriate degree of coupling is provided, the overall seismic overturning moment is resisted by two mechanisms: i) bending at the base of each wall, and ii) moment of the couple of axial compression/tension forces at the base of each wall, the magnitude of which depends on the shear forces generated at the coupling beams. This shear wall system has proven very effective at controlling damage in structures where coupling beams are detailed to provide high energy dissipation. However, such coupling beams need to transfer high shear forces while undergoing large deformations, which in turn impose strain demands on the concrete well beyond its ultimate strain in compression (usually ε cu =0.35-0.40%). As a result, the potential benefit of very ductile coupling beams able to dissipate large amounts of energy is limited by concrete (crushing) failure. This paper presents results of an experimental and numerical study on a novel structural system that combines the use of conventional, ductile RC shear walls and coupling beams made of a new, confined Highly Deformable Concrete (HDC). HDC incorporates recycled rubber granules from waste tyres as partial replacement of the mineral aggregates. The inclusion of rubber in HDC increases its deformability in compression (up to ε cu =4-5%), which in turn enhances the ductility and energy dissipation capacity of the coupling beams. Pushover analyses are carried out in OpenSees to compare the seismic performance of building structures fitted with conventional coupled walls and walls using confined HDC coupling beams. The results of the study indicate that, for the same risk scenario, buildings with HDC coupling beams exhibit a better performance, in terms of ductility, displacement and energy dissipation capacity than the conventional RC counterparts.

000018765 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018765 653__ $$aRubberized Concrete; Coupled Wall; Coupling beam

000018765 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018765 720__ $$aGarcia, Reyes$$iRaffoul, Samar$$iBenedetti, Matteo Di$$iHajirasouliha, Iman$$iGuadagnini, Maurizio$$iPilakoutas, Kypros$$iEscolano-Margarit, David
000018765 8560_ $$ffischerc@itam.cas.cz
000018765 8564_ $$s679398$$uhttps://invenio.itam.cas.cz/record/18765/files/2195.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2195.
000018765 962__ $$r16048
000018765 980__ $$aPAPER