Accidental torsion in buildings due to base rotational excitation

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dc.catalogadorpva
dc.contributor.authorDe La Llera Martin, Juan Carlos
dc.contributor.authorChopra, Anil K.
dc.date.accessioned2023-01-09T20:36:12Z
dc.date.available2023-01-09T20:36:12Z
dc.date.issued1994
dc.description.abstractThis investigation is concerned with accidental torsion in buildings resulting from rotational excitation (about a vertical axis) of the building foundations as a result of spatially non-uniform ground motions. Because of this accidental torsion, the displacements and deformations in the structural elements of the building are likely to increase. This increase in response is evaluated using actual base rotational excitations derived from ground motions recorded at the base of 30 buildings during recent California earthquakes. Accidental torsion has the effect of increasing the building displacements, in the mean, by less than 5 per cent for systems that are torsionally stiff or have lateral vibration periods longer than half a second. On the other hand, short period (less than half a second) and torsionally flexible systems may experience significant increases in response due to accidental torsion. Since the dependence between this increase in response and the system parameters is complex, two simplified methods are developed for conveniently estimating this effect of accidental torsion. They are the ‘accidental eccentricity’ and the ‘response spectrum’ method. The computed accidental eccentricities are much smaller than the typical code values, 0.05bb or 0.1b, except for buildings with very long plan dimensions (b ≥ 50 m). Alternatively, by using the response spectrum method the increase in response can be estimated by computing the peak response to each base motion independently and combining the peak values using the SRSS rule.
dc.fechaingreso.objetodigital2023-01-09
dc.format.extent18 páginas
dc.fuente.origenSIPA
dc.identifier.doi10.1002/eqe.4290230906
dc.identifier.urihttps://doi.org/10.1002/eqe.4290230906
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/66210
dc.information.autorucEscuela de ingeniería ; De la Llera Martin, Juan Carlos ; 0000-0002-9064-0938 ; 53086
dc.issue.numero9
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final1021
dc.pagina.inicio1003
dc.revistaEarthquake Engineering & Structural Dynamicses_ES
dc.rightsacceso restringido
dc.rights.holderThe Author(s)
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.titleAccidental torsion in buildings due to base rotational excitationes_ES
dc.typeartículo
dc.volumen23
sipa.codpersvinculados53086
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