000020115 001__ 20115
000020115 005__ 20170118182355.0
000020115 04107 $$aeng
000020115 046__ $$k2017-01-09
000020115 100__ $$aStojadinovic, Bozidar
000020115 24500 $$aBehavior of Inverted Pendulum Cylindrical Structures That Rock and Wobble During Earthquakes

000020115 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020115 260__ $$b
000020115 506__ $$arestricted
000020115 520__ $$2eng$$aThe in-plane (2d) response of rigid rocking blocks has been extensively studied. In order to use rocking as a seismic response modification strategy for large structures (such as bridges and chimneys), the rocking motion of bodies in two orthogonal planes (3d rocking) needs to be explored first. Dynamic models of systems allowed to step out or roll out of their initial position and rocking plane have received attention. However, under earthquake excitation such systems may remain stable, but often end their motion with significant residual displacements with respect to their starting position. Such behavior is not acceptable for real structures. This paper studies the 3d motion of a rigid cylinder that is allowed to uplift and sustain rocking and wobbling motion without sliding or rolling-out of its initial position. Like a rectangular body in 2d rocking motion, the cylinder has zero residual displacement at the end of its 3d motion. The 3d dynamic model of the cylinder has two degrees of freedom, making it the simplest 3d extension of Housner’s classical rocking model. The development of the 3d cylinder model is presented first. This model is computationally inexpensive and simple enough to perform extensive parametric analyses to understand the roles of the dominant parameters of the 3d rocking and wobbling (unsteady rolling) motion. Modes of motion of the cylinder are identified and presented. Finally, 3d rocking and wobbling spectra are constructed and compared with the classical 2d rocking spectra, to indicate that, in many cases, the 2d approach may lead to unconservative estimates of 3d rocking and wobbling response.

000020115 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020115 653__ $$arocking isolation; 3d rocking motion; uplifting structures;

000020115 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020115 720__ $$aStojadinovic, Bozidar$$iVassiliou, Michalis F$$iBachmann, Jonas$$iEgger, Marius$$iBurger, Stefan$$iVassiliou, Michalis
000020115 8560_ $$ffischerc@itam.cas.cz
000020115 8564_ $$s1447385$$uhttps://invenio.itam.cas.cz/record/20115/files/594.pdf$$yOriginal version of the author's contribution as presented on USB, paper 594.
000020115 962__ $$r16048
000020115 980__ $$aPAPER