000019159 001__ 19159
000019159 005__ 20170118182302.0
000019159 04107 $$aeng
000019159 046__ $$k2017-01-09
000019159 100__ $$aKotani, Naoto
000019159 24500 $$aSeismic Energy Response of Multi-Story Steel Rocking Frames Allowing Column Mid-Height At the First Story

000019159 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019159 260__ $$b
000019159 506__ $$arestricted
000019159 520__ $$2eng$$aObservations from past earthquakes suggest that some buildings survived severe ground motion because of accidental uplift at their foundation. Such notion has motivated the development of rocking systems that permit some portion of the structure to uplift and rotate about a pivot. In this paper, the writers propose a rocking frame that allows uplift at the middle of the columns. The column mid-height uplift (CMU) mechanism fully resists shear forces and is generally accompanied by steel dampers. A series of nonlinear time history analyses was conducted on a model of a four, six and ten-story steel buildings equipped with CMU mechanisms. The CMU mechanisms was modeled using (1) a contact element (that permits uplift but resists compression), (2) a linear shear element, and (3) a bilinear element (that models steel dampers). The models were subjected to seventeen recorded ground motions, each scaled to a maximum ground velocity of 1.0 and 1.25 m/s. For comparison, the analyses were repeated for models where the bilinear elements were removed (CMU-ND model), and models where the first-story columns were continuous with no contact element (MF model). The results are summarized as follows: (1) Little difference was observed between the CMU model and MF model in terms of maximum roof acceleration. (2) Maximum roof drift was significantly smaller in the CMU model than in the CMU-ND model, especially if structure have high aspect ratio. (3) Energy dissipated by the steel system was significantly smaller in the CMU model than in the MF model.

000019159 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019159 653__ $$aRocking frame, Colum mid-height uplift, Steel damper, Earthquake energy response

000019159 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019159 720__ $$aKotani, Naoto$$iOkazaki, Taichiro$$iAsari, Tetsuhiro$$iIshihara, Tadashi$$iAzuhata, Tatsuya$$iMidorikawa, Mitsumasa
000019159 8560_ $$ffischerc@itam.cas.cz
000019159 8564_ $$s695250$$uhttps://invenio.itam.cas.cz/record/19159/files/2986.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2986.
000019159 962__ $$r16048
000019159 980__ $$aPAPER