000013338 001__ 13338
000013338 005__ 20161114160337.0
000013338 04107 $$aeng
000013338 046__ $$k2009-06-22
000013338 100__ $$aAnagnostopoulos S., A.
000013338 24500 $$aAn answer to a persisting controversy in earthquake resistant design of asymmetric buildings for torsion

000013338 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013338 260__ $$bNational Technical University of Athens, 2009
000013338 506__ $$arestricted
000013338 520__ $$2eng$$aOne of the persisting controversies associated with the inelastic dynamic, torsional response of asymmetric buildings is whether the so called “critical” elements of the building are those in the “stiff” or the “flexible” sides. The term “critical” is used for the element that exhibits the largest ductility demand during an earthquake, while the terms “stiff” and “flexible” sides indicate those sides of the building that exhibit reduced and increased translational displacements, respectively, as a result of torsion. The published results on this issue in the past are divided between the two possibilities. In this paper, using results from inelastic, earthquake, dynamic analyses of two asymmetric buildings with 3 and 5 stories each, modeled as M.D.O.F. space frames with plastic hinge idealization of their members, it is shown that the critical elements are those at the flexible side. It is further shown that the same conclusion can be obtained using the simplified, one story models, provided that their strengths reflect the total strengths of the real building elements. If, however, the element strengths of the simplified models are determined solely from the earthquake loading, i.e. without accounting for the strength due to gravity loads, as it has been done practically without exception in the past, then the results indicate the elements at the stiff side as the critical elements. This provides a convincing answer to the aforementioned controversy.

000013338 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013338 653__ $$aEarthquake, torsion, non-linear seismic response, simplified models, multi-storey buildings, controversy Abstract. One of the persisting controversies associated with the inelastic dynamic, torsional response of asymmetric buildings is whether the so called “critical” elements of the building are those in the “stiff” or the “flexible” sides. The term “critical” is used for the element that exhibits the largest ductility demand during an earthquake, while the terms “stiff” and “flexible” sides indicate those sides of the building that exhibit reduced and increased translational displacements, respectively, as a result of torsion. The published results on this issue in the past are divided between the two possibilities. In this paper, using results from inelastic, earthquake, dynamic analyses of two asymmetric buildings with 3 and 5 stories each, modeled as M.D.O.F. space frames with plastic hinge idealization of their members, it is shown that the critical elements are those at the flexible side. It is further shown that the same conclusion can be obtained using the simplified, one story models, provided that their strengths reflect the total strengths of the real building elements. If, however, the element strengths of the simplified models are determined solely from the earthquake loading, i.e. without accounting for the strength due to gravity loads, as it has been done practically without exception in the past, then the results indicate the elements at the stiff side as the critical elements. This provides a convincing answer to the aforementioned controversy.

000013338 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013338 720__ $$aAnagnostopoulos S., A.$$iAlexopoulou, C.$$iStathopoulos, K.
000013338 8560_ $$ffischerc@itam.cas.cz
000013338 8564_ $$s356694$$uhttps://invenio.itam.cas.cz/record/13338/files/CD499.pdf$$yOriginal version of the author's contribution as presented on CD, section: Irregular structures.
000013338 962__ $$r13074
000013338 980__ $$aPAPER