000013164 001__ 13164
000013164 005__ 20161114160330.0
000013164 04107 $$aeng
000013164 046__ $$k2009-06-22
000013164 100__ $$aGasparini, G.
000013164 24500 $$aSimple formulas for the estimation of maximum rotational response of one-storey asymmetric systems under seismic excitation

000013164 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013164 260__ $$bNational Technical University of Athens, 2009
000013164 506__ $$arestricted
000013164 520__ $$2eng$$aStructures characterized by non coincident centre of mass CM and centre of stiffness CK (Fig. 1), also referred to as asymmetric (or eccentric) structures, develop a coupled lateral-torsional response when subjected to seismic excitation. This coupled behavior may increase significantly the local peak dynamic response of such a structure, as compared to that of an equivalent system with coincident center of mass and center of stiffness (equivalent non-eccentric system). In this paper, starting from a closed-form formulation identified in previous research works by the authors, an estimation of the maximum rotational response of one-storey asymmetric systems under seismic excitation is obtained and developed with respect to different applications. In detail: (1) a corrective eccentricity for the evaluation of the dynamic response of asymmetric systems through “equivalent” static procedures is identified, (2) a sensitivity analysis is carried out upon the accidental eccentricity, (3) the increase in the peak local displacement due to the eccentricity is evaluated at the corner-point of the side of the system. The results provide useful insight into understanding the torsional behavior of asymmetric systems and may directly used for preliminary design and/or check of results obtained through three-dimensional finite-element modeling of the structural system.

000013164 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013164 653__ $$aeccentricity, maximum rotational response, simple formulas, peak local displacement, sensitivity analysis. Abstract. Structures characterized by non coincident centre of mass CM and centre of stiffness CK (Fig. 1), also referred to as asymmetric (or eccentric) structures, develop a coupled lateral-torsional response when subjected to seismic excitation. This coupled behavior may increase significantly the local peak dynamic response of such a structure, as compared to that of an equivalent system with coincident center of mass and center of stiffness (equivalent non-eccentric system). In this paper, starting from a closed-form formulation identified in previous research works by the authors, an estimation of the maximum rotational response of one-storey asymmetric systems under seismic excitation is obtained and developed with respect to different applications. In detail: (1) a corrective eccentricity for the evaluation of the dynamic response of asymmetric systems through “equivalent” static procedures is identified, (2) a sensitivity analysis is carried out upon the accidental eccentricity, (3) the increase in the peak local displacement due to the eccentricity is evaluated at the corner-point of the side of the system. The results provide useful insight into understanding the torsional behavior of asymmetric systems and may directly used for preliminary design and/or check of results obtained through three-dimensional finite-element modeling of the structural system.

000013164 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013164 720__ $$aGasparini, G.$$iSilvestri, S.$$iTrombetti, T.
000013164 8560_ $$ffischerc@itam.cas.cz
000013164 8564_ $$s363977$$uhttps://invenio.itam.cas.cz/record/13164/files/CD218.pdf$$yOriginal version of the author's contribution as presented on CD, section: Irregular structures.
000013164 962__ $$r13074
000013164 980__ $$aPAPER