000013730 001__ 13730
000013730 005__ 20161114170253.0
000013730 04107 $$aeng
000013730 046__ $$k2011-05-25
000013730 100__ $$aHosseini, M.
000013730 24500 $$aPhysically Simplified Model of Multi-Story Buildings for Their Quick Dynamic Analysis

000013730 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013730 260__ $$bNational Technical University of Athens, 2011
000013730 506__ $$arestricted
000013730 520__ $$2eng$$aTo increase the tendency of practicing engineers, engaged in the seismic design and evaluation of structural systems, to performing dynamic or Time History Analyses (THA) one way is reducing the volume of data, engaged in THA, and therefore, the volume of dynamic calculations. This would increase the computational efficiency in seismic structural analyses. One way for reducing the volume of input data and the corresponding output and information is the physical simplification of Multi-Degree-Of-Freedom (MDOF) systems, so that instead of working with n×n matrices, resulted from the n-Degree-Of-Freedom system, the engineer works with nr×nr matrices (nr<<n), belonging to a physically simplified system which has nr degrees of freedom. For multi-story shear beam type buildings finding the equivalent simplified system is not very difficult. In fact, it is possible to introduce for a multi-story building an equivalent building with the same overall height, but having fewer number of stories with the same story mass while the stories’ heights are more so that their stiffness values are less and the proportion of stiffness and mass of the original building is kept in the simplified model. In this way the modal frequencies of the reduced model will be correspondingly equal to the first few modal frequencies of the original building. However, the amount of base shear force and base moment of the reduced model will be less than that of the original building, and will be related to them by some specific factors which are functions of the ratio of number of stories of the original building and the reduced model. Several examples of response time histories calculated for a series of multi-story buildings and their simplified reduced models, obtained by using the proposed method, show that by using the proposed simplification technique the volume of elaborations needed for THA of building systems are reduced drastically. The amount of reduction in the ‘required calculation time’, and also the achieved level of precision in response values both depend on the number of stories of the original building and the ratio of number of stories of the original building and the reduced model.

000013730 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013730 653__ $$aTime History Analysis, Base shear, Base moment, Required calculation time

000013730 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013730 720__ $$aHosseini, M.$$iLarki A., Ashtari
000013730 8560_ $$ffischerc@itam.cas.cz
000013730 8564_ $$s7506324$$uhttps://invenio.itam.cas.cz/record/13730/files/583.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 01 Accuracy and Computational Efficiency in Seismic Structural Analysis.
000013730 962__ $$r13401
000013730 980__ $$aPAPER