000021894 001__ 21894
000021894 005__ 20170622131310.0
000021894 04107 $$aeng
000021894 046__ $$k2017-06-15
000021894 100__ $$aZarabimanesh, Yalda
000021894 24500 $$aON REDUCTION OF COMPUTATIONAL COST IN TRANSIENT ANALYSIS OF STRUCTURES AGAINST NEAR FIELD EARTHQUAKES

000021894 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021894 260__ $$bNational Technical University of Athens, 2017
000021894 506__ $$arestricted
000021894 520__ $$2eng$$aTime integration is a powerful tool in time history analysis against seismic excitations. Nevertheless, the computational costs are considerable and inaccuracies exist for the computed responses. In 2008, a technique is introduced for reducing the analysis computational cost, with negligible additional inaccuracy. The key idea is a convergence-based replacement of the digitized seismic excitation with excitations recorded at larger steps such that the new step size is larger than the original step size by a positive integer and the scale of the enlargement satisfies an accuracy-based inequality. Accordingly, the technique is applicable merely when a positive integer satisfies the inequality, and then the accuracy of the responses after implementation of the technique should be acceptable. Since these applicability and performance issues are not theoretically established in a rigorous way, they are studied numerically; the results of implementation of the technique in time integration analysis of many structural systems, e.g. 2D and 3D frames of regular and irregular buildings, bridges, silos, space structures, a power plant, a telecommunication tower, etc. against different far field earthquakes, and by different time integration methods, are successful (very recently, it is also displayed that the technique can be effectual in reducing the computational cost of static analyses). To extend this versatility and in view of the special features of near field earthquakes, in this paper, the applicability and performance are tested regarding transient analysis of a telecommunication tower against a near field record by three time integration methods, while once disregarding the P-Delta effect and once taking it into account. The observations were all satisfactory evidencing that the computational cost reduction technique proposed in 2008 might be successfully applicable to transient analysis against near field earthquake records.

000021894 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021894 653__ $$atime integration, digitized excitation, ground motion, near field

000021894 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021894 720__ $$aZarabimanesh, Yalda$$iSoroushian, Aram$$iMirghaderi, Seyed Rasoul$$iAkbarnejad, Farhad$$iSoleymani, Kaveh$$iKhalkhali, Seyed Mohammad Hassan
000021894 8560_ $$ffischerc@itam.cas.cz
000021894 8564_ $$s117947$$uhttps://invenio.itam.cas.cz/record/21894/files/18257.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS31] Advances in transient analysis of structures and the academic/commercial soft wares
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000021894 962__ $$r21500
000021894 980__ $$aPAPER