Observing Rotational and Translational Ground Motions at the HGSD Station in Taiwan from 2007 to 2008

Liu, Chun-Chi; Huang, Bor‐Shouh; Lee, William H. K.; Lin, Ching‐Ren

doi:10.1785/0120080156

Cited by 57 publications

(50 citation statements)

References 8 publications

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“…Only one rotation sensor (Eentec R-1; connected to a Nanometrics Taurus digitizer) was available for the post-seismic array. This sensor was tested by Bernauer et al (2012) and used by several authors (e.g., Liu et al 2009;Yin et al 2016;Zembaty et al 2017). Details about its instrumental response correction can be found in Yin et al (2016).…”

Section: Building the Kefalonia Rotational Datasetsmentioning

confidence: 99%

“…and soft-soil site (phase 3) datasets introduced here, and three other datasets from the literature (Liu et al 2009;Takeo 2009;Yin et al 2016). The magnitudes of the different events are shown according to a colour scale.…”

Section: "Peak Value" Analysis Of the Datasetsmentioning

confidence: 99%

“…Igel et al (2005) and Igel et al (2007) used a ring laser gyro to record rotational motions for large, long-distance events. The development of more compact (and cheaper) sensors based on electrochemical magnetohydrodynamic technology allowed easier field deployment, used, for example, by Liu et al (2009), Wassermann et al (2009), Yin et al (2016), and Zembaty et al (2017).…”

mentioning

confidence: 99%

“…There is the dataset built by Takeo (2009) with the records of a seismic swarm in offshore Ito, Japan, and those built by Liu et al (2009) in Taiwan, and Yin et al (2016) at the Garner Valley Downhole Array (GVDA) in California, USA. The effects of the local soil conditions on rotations have not been directly addressed from the empirical and statistical points of view, especially due to the lack of large and diversified datasets, although these local soil conditions might have great impact on the translational seismic hazard levels, due to the importance of site effects, and on the rotational motion as well, in relation to the development of local surface waves.…”

mentioning

confidence: 99%

“…This survey was conducted within the framework of the SINAPS@ program (Berge-Thierry et al 2016). These new datasets are compared with the previously available datasets (Liu et al 2009;Takeo 2009;Yin et al 2016), and the relationships between translational acceleration and rotational velocity are discussed. Special attention will be paid to possible effects of the soil properties on translational acceleration versus rotational velocity correlations.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Analysis of rotation sensor data from the SINAPS@ Kefalonia (Greece) post-seismic experiment—link to surface geology and wavefield characteristics

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Hollender

Perron

et al. 2017

Earth Planets Space

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Section: Building the Kefalonia Rotational Datasetsmentioning

confidence: 99%

Section: "Peak Value" Analysis Of the Datasetsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Analysis of rotation sensor data from the SINAPS@ Kefalonia (Greece) post-seismic experiment—link to surface geology and wavefield characteristics

Sbaa

Hollender

Perron

et al. 2017

Earth Planets Space

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The effect of rotational component of earthquake excitation on the response of steel structures

Pnevmatikos¹,

Konstandakopoulou

Papavasileiou³

et al. 2021

ce papers

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This work is on the influence of the rotational component of earthquake excitations to the response of steel structures. In most studies, seismic input is being modeled only using the translational component of the ground acceleration, while the rotational one is ignored. This was due to the observation that the rotational component had minimal effect on low‐rise buildings. Hence, the accelerometers used would not measure it, leading to a lack of records. Nowadays, technology provides such instruments and relative records are made available. Indicative of that is that elastic design response spectra for rotational components are introduced to the design codes. In this paper, the results on structural response and internal forces due to the rotational component of a seismic excitation on the steel structures are examined. Dynamic time history analysis and response spectrum analysis of different steel structures are performed (a) considering the rotational component of the excitation and (b) without it. From the numerical results it is shown that the impact of rotational component in structural response and internal forces of the steel structures is significant and should not be ignored during structural design.

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Free‐field rotations during earthquakes: Relevance on buildings

Castellani

Stupazzini

Guidotti

2011

Earthq Engng Struct Dyn

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Soil rotations around horizontal axes, during an earthquake, are studied through records collected by closely spaced arrays of strong motion accelerometers. The cross power spectrum of accelerations at nearby stations has been generally utilized to describe the spatial distribution of the motion. A number of cross spectra have been obtained during the training of these arrays. To take profit of these elaborations, a mathematical relation is established between the cross power spectrum and the power spectrum of the rotation.\ud Rotation data presented by Liu et al, concerning 52 earthquake records collected at a single station in Taiwan, are compared with rotation data computed according to our procedure. The two series of data are suitably normalized to the peak horizontal acceleration. The data are shown in function of the distance from epicentre. The same ratio, computed according to our procedure, is in good agreement with the average value of these data.\ud Direct measurements and the present approach have lead to evaluations of rotation higher than those predicted by mathematical investigations on the basis of the wave propagation theory, for comparable circumstances.\ud The relevance of this input motion for relatively tall structures is examined, with reference to the structural effects that the horizontal motion concurrently provides. Meaningful will be ranked those effects of the order of magnitude of 20% or higher than those implied by the horizontal excitation.\ud For understanding the relevance on building structures, the procedure has two areas of concern: 1) the coherence implicit in the cross power spectra, which depends on the interpolation process of the original records, collected in the arrays of instruments, and 2) the relative importance of the vertical to the horizontal input motion.\ud As to the second item, the relevance of the rotation component on structures largely depends on the relative importance of the vertical to the horizontal input motion. When the records in an area a few km from the epicenter are considered, the response spectrum of vertical motion is comparable and in some records even higher, than that of horizontal motion, over the entire range of frequencies. This has been observed as well for the 2009 earthquake event of L’Aquila, Italy, and that at the Christchurch (New Zealand) 2011. When the response spectrum of vertical motion is comparable to that of horizontal motion, the effects of rotational motions on most engineering structures can be meaningful

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Observing Rotational and Translational Ground Motions at the HGSD Station in Taiwan from 2007 to 2008

Cited by 57 publications

References 8 publications

Analysis of rotation sensor data from the SINAPS@ Kefalonia (Greece) post-seismic experiment—link to surface geology and wavefield characteristics

Analysis of rotation sensor data from the SINAPS@ Kefalonia (Greece) post-seismic experiment—link to surface geology and wavefield characteristics

The effect of rotational component of earthquake excitation on the response of steel structures

Free‐field rotations during earthquakes: Relevance on buildings

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