000019226 001__ 19226
000019226 005__ 20170118182305.0
000019226 04107 $$aeng
000019226 046__ $$k2017-01-09
000019226 100__ $$aSritharan, Sri
000019226 24500 $$aEnergy Dissipation Components of Precast Concrete Single Rocking Walls

000019226 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019226 260__ $$b
000019226 506__ $$arestricted
000019226 520__ $$2eng$$aThough not widely used in practice due to their limited energy dissipation capacity, recent research has shown that single post-tensioned precast concrete rocking walls can be used to satisfactorily resist earthquake loads. These walls, dissipate energy imparted to them during rocking due to the wall impacting the foundation, limited hysteretic action resulting from concrete nonlinearity, and inherent viscous damping. Relying only on the limited energy dissipation, a shake table study was conducted on four Single Rocking Walls (SRWs) using multiple-level earthquake input motions. Using the experimental data, participation of different damping components of SRWs in their seismic energy dissipation was evaluated. On average, an equivalent viscous damping ratio of 6% was estimated for SRWs, with dynamic impacts contributing to about one third of the total damping. For analytical predictions, it is shown that the impact energy loss can be satisfactorily captured using a 3% tangent stiffness damping. Despite the low amount of energy dissipation, all four SRWs generally produced satisfactory responses. While the peak displacement was somewhat higher due to the low amount of energy dissipation, the duration of rocking of these walls was found to be reduced by negative rate of input energy, which ultimately reduced the seismic energy imparted to the walls.

000019226 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019226 653__ $$aunbonded Post-tensioing, precast concrete, rocking walls, energy dissipation, shake table testing

000019226 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019226 720__ $$aSritharan, Sri$$iNazari, Maryam
000019226 8560_ $$ffischerc@itam.cas.cz
000019226 8564_ $$s613717$$uhttps://invenio.itam.cas.cz/record/19226/files/3126.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3126.
000019226 962__ $$r16048
000019226 980__ $$aPAPER