000019463 001__ 19463
000019463 005__ 20170118182319.0
000019463 04107 $$aeng
000019463 046__ $$k2017-01-09
000019463 100__ $$aMogi, Yoshihiro
000019463 24500 $$aModal Decomposition and Behavior of Free Vibration Response With Grounding and Uplift

000019463 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019463 260__ $$b
000019463 506__ $$arestricted
000019463 520__ $$2eng$$aThe effect of uplift on earthquake response of buildings had been investigated by nonlinear earthquake response analyses and shaking table tests of small-scale building models. As a result of these studies, it is found that uplift reduces story shear force that causes structural damage. If it is possible to level off earthquake loading acting on a building by allowing uplift, an epoch-making design system that is independent of input earthquake size or its periodic characteristics may be able to be established. However, it has been found that an uplifting building is vibrating randomly due to higher mode vibration. Therefore it is difficult to predict external load distribution and its size acting on the building. This study presents a modal analysis approach applied to vibrating structures in grounding and uplifting phases. By assuming the non-linear term can be treated as an external force, the modal analysis problem can be simplified and it becomes possible to carry out modal decomposition. Based on this assumption, modal decomposition on response of the uplift building could be carried out as "spring pendulum under gravity". The behavior of SDOF spring pendulum which represents a higher mode is very simple and clarified that vibration was simply caused by movement of an equilibrium position accompanying change of gravity value and direction.

000019463 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019463 653__ $$aUplift, Modal decomposition, Higher-mode vibration, Spring-pendulum, Impact

000019463 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019463 720__ $$aMogi, Yoshihiro$$iOkayama, Shinnosuke
000019463 8560_ $$ffischerc@itam.cas.cz
000019463 8564_ $$s659314$$uhttps://invenio.itam.cas.cz/record/19463/files/3682.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3682.
000019463 962__ $$r16048
000019463 980__ $$aPAPER