000018205 001__ 18205
000018205 005__ 20170118182212.0
000018205 04107 $$aeng
000018205 046__ $$k2017-01-09
000018205 100__ $$aMakarios, Triantafyllos
000018205 24500 $$aIdentification of Dynamic Characteristics of a Continuous Dynamic System: Case Study for a Three-Story Flexible Steel Stairway

000018205 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018205 260__ $$b
000018205 506__ $$arestricted
000018205 520__ $$2eng$$aIn this work, a modal shape identification procedure for a flexible steel stairway located within a building complex at Aristotle University in Thessaloniki, Greece is presented. The aforementioned stairway is a system with continuous distribution of mass and stiffness, a fact that makes structural identification challenging as compared to structures where these two basic parameters are observed to be lumped at certain locations such as the floors and the vertical support elements. More specifically, this stairway was instrumented using a local multi-channel network of accelerometers. Two twelve-bit nominal resolution, digital uniaxial accelerometers, connected by cables and with 'common time' and 'common start' characteristics were installed on the stairway. Dynamic input to the stairway was provided by pedestrian traffic. The dominant modes of vibration of the stairway were computed by the 'modal response acceleration time history' methodology, as developed by the authors over the last few years. In parallel, a detailed finite element method model of the stairway was built and calibrated according to the ambient vibration results. The present identification procedure used for the dynamic characteristics of spatial structures yields results that can be used to develop a family of numerical models for the stairway ranging from the simple single-degree-of-freedom system to highly detailed multiple-degree-of-freedom models. Finally, some useful information on the theoretical procedure for the identification of modal shapes is included in this work.

000018205 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018205 653__ $$aModal identification; mode shapes; modal response; acceleration time histories; finite element models;

000018205 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018205 720__ $$aMakarios, Triantafyllos$$iManolis, George$$iTerzi, Vasiliki$$iKaretsou, Ioanna
000018205 8560_ $$ffischerc@itam.cas.cz
000018205 8564_ $$s995775$$uhttps://invenio.itam.cas.cz/record/18205/files/1011.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1011.
000018205 962__ $$r16048
000018205 980__ $$aPAPER