Are seismic losses affected by the angle of seismic incidence?

Skoulidou, Despoina; Romão, Xavier

doi:10.1007/s10518-021-01121-0

Cited by 10 publications

(2 citation statements)

References 39 publications

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“…Ruggieri and Uva studied the influence of the loading direction on the nonlinear behavior of regular and irregular buildings based on pushover analysis (Ruggieri and Uva, 2020). The influence of the ASI on the probabilistic seismic assessment results has also been studied by Lagaros (Lagaros, 2010) and Skoulidou and Romao (Skoulidou and Romao, 2020;Skoulidou and Romao, 2021). Even though their numbers are limited, there are some studies concerning the influence of the ASI on the nonlinear responses of base-isolated buildings (e.g., Laguardia et al, 2019;Cavdar and Ozdemir, 2020;Ozdemir, 2022, Lin et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Influence of the Angle of Seismic Incidence of Long-Period Pulse-like Ground Motion on an Irregular Base-Isolated Building

Fujii¹

2022

Preprint

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In general, isolators and dampers used in seismically isolated buildings are designed to be isotropic in any horizontal direction. However, in the case of buildings with plan irregularities, their nonlinear responses depend on the direction of seismic loading. To discuss the influence of the angle of seismic incidence (ASI) on the nonlinear response of irregular building structures, it is important to define the angle of the critical axis of the horizontal ground motion. One possible choice is the “principal axis of ground motion” proposed by Arias (1970). However, because this principal axis is independent of the natural period of a structure, it could be complicated to use for seismically isolated structures with long natural periods. In this study, the influence of the ASI of long-period pulse-like seismic input on an irregular base-isolated building is investigated. First, the angle of the principal axis of ground motion is defined in terms of the cumulative energy input. Then, a nonlinear time-history analysis of a five-story irregular base-isolated building is performed using 10 long-period pulse-like ground motion records considering various ASIs. The results show that, compared with the principal axis of ground motion proposed by Arias, defining the principal axis of ground motion in terms of the cumulative energy input is more suitable for discussions concerning the influence of the ASI on the response of an irregular base-isolated building.

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Section: Introductionmentioning

confidence: 99%

Influence of the Angle of Seismic Incidence of Long-Period Pulse-like Ground Motion on an Irregular Base-Isolated Building

Fujii¹

2022

Preprint

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building

Fujii

2022

Front. Built Environ.

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In general, isolators and dampers used in seismically isolated buildings are designed to be isotropic in any horizontal direction. However, in the case of buildings with plan irregularities, their nonlinear responses depend on the direction of seismic loading. To discuss the influence of the angle of seismic incidence (ASI) on the nonlinear response of irregular building structures, it is important to define the angle of the critical axis of the horizontal ground motion. One possible choice is the “principal axis of ground motion” proposed by Arias (A measurement of earthquake intensity, 1970). However, because this principal axis is independent of the natural period of a structure, it could be complicated to use for seismically isolated structures with long natural periods. In this study, the influence of the ASI of long-period pulse-like seismic input on an irregular base-isolated building is investigated. First, the angle of the principal axis of ground motion is defined in terms of the cumulative energy input. Then, a nonlinear time-history analysis of a five-story irregular base-isolated building is performed using 10 long-period pulse-like ground motion records considering various ASIs. The results show that, compared with the principal axis of ground motion proposed by Arias, defining the principal axis of ground motion in terms of the cumulative energy input is more suitable for discussions concerning the influence of the ASI on the response of an irregular base-isolated building.

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Assessing residual deformation of bridge piers under bidirectional near-fault motions with forward directivity and fling-step

Santra

Roy

2023

Bull Earthquake Eng

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Are seismic losses affected by the angle of seismic incidence?

Cited by 10 publications

References 39 publications

Influence of the Angle of Seismic Incidence of Long-Period Pulse-like Ground Motion on an Irregular Base-Isolated Building

Influence of the Angle of Seismic Incidence of Long-Period Pulse-like Ground Motion on an Irregular Base-Isolated Building

Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building

Assessing residual deformation of bridge piers under bidirectional near-fault motions with forward directivity and fling-step

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