000010050 001__ 10050
000010050 005__ 20141205154140.0
000010050 04107 $$aeng
000010050 046__ $$k2008-10-12
000010050 100__ $$aGasparini, Giada
000010050 24500 $$aA Simple Code-Like Formula for Estimating the Torsional Effects on Structures Subjected to Earthquake Ground Motion Excitation

000010050 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010050 260__ $$b
000010050 506__ $$arestricted
000010050 520__ $$2eng$$aPlan asymmetric (eccentric) structures, characterized by non coincident centre of mass and centre of stiffness, when subjected to dynamic excitation, develop a coupled lateral-torsional response that may increase their local peak dynamic response. In order to effectively apply the performance-based design approach to seismic design, there is a growing need for code oriented methodologies aimed at predicting deformation parameter. In this respect, for plan asymmetric structures, estimating maximum displacements at different locations in plan, especially at the perimeter, requires an evaluation of the floor rotations. The ability to predict floor rotations can be also useful to extend simplified procedures of seismic design, such as push-over analyses, to plan irregular structures. In this paper, starting from a closed-form formulation identified in previous re-search 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 displacements 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.

000010050 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010050 653__ $$aeccentric structures, torsional effects, floor rotations, structural parameters, simple code-like formula 

000010050 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010050 720__ $$aGasparini, Giada$$iSilvestri, Stefano$$iTrombetti, Tomaso
000010050 8560_ $$ffischerc@itam.cas.cz
000010050 8564_ $$s276387$$uhttps://invenio.itam.cas.cz/record/10050/files/05-01-0269.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-01-0269.
000010050 962__ $$r9324
000010050 980__ $$aPAPER