Estimating Site Fundamental Period from Shear‐Wave Velocity Profile

Wang, Su‐Yang; Shi, Yang; Jiang, Wei‐Ping; Yao, Erlei; Miao, Yu

doi:10.1785/0120180103

Cited by 27 publications

(25 citation statements)

References 45 publications

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“…1). These data sets were published by Wang et al (2018) using HVSR, by Wang (2017) and Pousse (2005) using surface-to-borehole spectral ratio (SBSR), and by Fujiwara et al (2009) using radial-to-vertical spectral ratio (RVSR) approaches, respectively (Table 1). Complete waveforms of earthquake recordings were utilized except for Fujiwara et al, (2009) who used only S-coda waves (20 s after S-wave arrival).…”

Section: Potential Factors Explaining Inconsistencies In Resonant Frequency Measurementsmentioning

confidence: 99%

“…1), especially between those obtained by Pousse (2005) and Fujiwara et al (2009). The choice of PSA (Wang et al, 2018) or FAS (Pousse, 2005;Fujiwara et al, 2009;Wang, 2017) may contribute to the inconsistencies in these data (Fig. 1).…”

Section: Potential Factors Explaining Inconsistencies In Resonant Frequency Measurementsmentioning

confidence: 99%

“…However, the first peak period (T01_FAS) exhibits no evident advantage over VS30, which is inconsistent with our previous results (Zhu et al, 2019a). In the preceding study, we adopted the site period (T0) data provided by Wang et al, (2018) and showed that T0 was a better site proxy than VS30 in characterizing site effects. This inconsistency arises from the different definitions of significant peaks.…”

Section: Efficacy In Modelling Linear Site Effectsmentioning

confidence: 99%

“…This inconsistency arises from the different definitions of significant peaks. Wang et al (2018) obtained T0 data following a rather stringent procedure, which led to 265 (56%) out of 473 KiK-net sites having T0. In contrast, resonant periods used in Figure 13 are picked up using only the first criterion [ 1: log 10 ̅̅̅̅̅̅̅̅ ( 0 ) > 0.…”

Section: Efficacy In Modelling Linear Site Effectsmentioning

confidence: 99%

See 3 more Smart Citations

Detecting Site Resonant Frequency Using HVSR: Fourier versus Response Spectrum and the First versus the Highest Peak Frequency

Zhu

Cotton

Pilz

2020

Bulletin of the Seismological Society of America

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In this investigation, we examine the uncertainties using the horizontal-to-vertical spectral ratio (HVSR) technique on earthquake recordings to detect site resonant frequencies at 207 KiK-net sites. Our results show that the scenario dependence of response (pseudospectral acceleration) spectral ratio could bias the estimates of resonant frequencies for sites having multiple significant peaks with comparable amplitudes. Thus, the Fourier amplitude spectrum (FAS) should be preferred in computing HVSR. For more than 80% of the investigated sites, the first peak (in the frequency domain) on the average HVSR curve over multiple sites coincides with the highest peak. However, for sites with multiple peaks, the highest peak frequency (fp) is less susceptible to the selection criteria of significant peaks and the extent of smoothing to spectrum than the first peak frequency (f0). Meanwhile, in comparison to the surface-to-borehole spectral ratio, f0 tends to underestimate the predominant frequency (at which the largest amplification occurs) more than fp. In addition, in terms of characterizing linear site response, fp shows a better overall performance than f0. Based on these findings, we thus recommend that seismic network operators provide fp on the average HVSRFAS curve as a priority, ideally together with the average HVSRFAS curve in site characterization.

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Section: Potential Factors Explaining Inconsistencies In Resonant Frequency Measurementsmentioning

confidence: 99%

Section: Potential Factors Explaining Inconsistencies In Resonant Frequency Measurementsmentioning

confidence: 99%

Section: Efficacy In Modelling Linear Site Effectsmentioning

confidence: 99%

Section: Efficacy In Modelling Linear Site Effectsmentioning

confidence: 99%

See 2 more Smart Citations

Detecting Site Resonant Frequency Using HVSR: Fourier versus Response Spectrum and the First versus the Highest Peak Frequency

Zhu

Cotton

Pilz

2020

Bulletin of the Seismological Society of America

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“…The first set of site period (T 0;H=V ) was derived by Wang et al (2018) using horizontal-to-vertical (H/V) response (5%) spectral ratio on complete waveforms of earthquake recordings. Selected earthquake ground motions (at least 10 records per station) were recorded between January 2009 and July 2017 with moment magnitudes M w > 3 and peak ground acceleration (PGA) ranging between 2 and 20 cm=s 2 .…”

Section: Site-specific Depth Measurementsmentioning

confidence: 99%

Testing the Depths to 1.0 and 2.5 km/s Velocity Isosurfaces in a Velocity Model for Japan and Implications for Ground‐Motion Modeling

Zhu

Cotton

Pilz

2019

Bulletin of the Seismological Society of America

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In the Next Generation Attenuation West2 (NGA‐West2) project, a 3D subsurface structure model (Japan Seismic Hazard Information Station [J‐SHIS]) was queried to establish depths to 1.0 and 2.5 km/s velocity isosurfaces for sites without depth measurement in Japan. In this article, we evaluate the depth parameters in the J‐SHIS velocity model by comparing them with their corresponding site‐specific depth measurements derived from selected KiK‐net velocity profiles. The comparison indicates that the J‐SHIS model underestimates site depths at shallow sites and overestimates depths at deep sites. Similar issues were also identified in the southern California basin model. Our results also show that these underestimations and overestimations have a potentially significant impact on ground‐motion prediction using NGA‐West2 ground‐motion models (GMMs). Site resonant period may be considered as an alternative to depth parameter in the site term of a GMM.

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Spectral ratio analysis of the site amplification effect and nonlinear site response at MYGH10 during the 2021 M_W 7.1 Fukushima earthquake in Japan

Zhang,

Tao,

Xie

et al. 2024

Earthquake Engineering and Resilience

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Ground motion recording with peak ground acceleration (PGA) exceeding 1.43 g was observed at the Yamamoto (MYGH10) station during the MW 7.1 Fukushima earthquake off the east coast of Honshu, Japan, in February 2021. In this study, we investigated the site amplification effect and nonlinear site response at the MYGH10 site using the horizontal‐to‐vertical spectral ratio (HVSR) and surface‐to‐borehole spectral ratio (SBSR), respectively. The site transfer function of station MYGH10 was presented using HVSRs (HVSR on the ground surface) and SBSR at different frequency bands. The dominant contributing frequency band of the PGA was determined by increasing the high cutoff frequency of the bandpass filter when filtering the acceleration recording, which was used to interpret the anomaly of the PGA by combining it with the site characteristics. We found an obvious site effect below the downhole sensor through the HVSRb (HVSR on the downhole bedrock) and determined the influence of the frequency band of the downhole site on ground motion. In addition, substantial discrepancies in the frequency and amplitude between the spectral ratio curves for the Fukushima mainshock records and the weak historical motions were identified. The calculated values of the degree of nonlinearity suggested that a strong nonlinear site response occurred at station MYGH10. Finally, the recovery of the site after strong shaking was evaluated by using the average spectral ratio curves of several aftershock records.

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Estimating Site Fundamental Period from Shear‐Wave Velocity Profile

Cited by 27 publications

References 45 publications

Detecting Site Resonant Frequency Using HVSR: Fourier versus Response Spectrum and the First versus the Highest Peak Frequency

Detecting Site Resonant Frequency Using HVSR: Fourier versus Response Spectrum and the First versus the Highest Peak Frequency

Testing the Depths to 1.0 and 2.5 km/s Velocity Isosurfaces in a Velocity Model for Japan and Implications for Ground‐Motion Modeling

Spectral ratio analysis of the site amplification effect and nonlinear site response at MYGH10 during the 2021 M_W 7.1 Fukushima earthquake in Japan

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Estimating Site Fundamental Period from Shear‐Wave Velocity Profile

Cited by 27 publications

References 45 publications

Detecting Site Resonant Frequency Using HVSR: Fourier versus Response Spectrum and the First versus the Highest Peak Frequency

Detecting Site Resonant Frequency Using HVSR: Fourier versus Response Spectrum and the First versus the Highest Peak Frequency

Testing the Depths to 1.0 and 2.5 km/s Velocity Isosurfaces in a Velocity Model for Japan and Implications for Ground‐Motion Modeling

Spectral ratio analysis of the site amplification effect and nonlinear site response at MYGH10 during the 2021 MW 7.1 Fukushima earthquake in Japan

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Product

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Spectral ratio analysis of the site amplification effect and nonlinear site response at MYGH10 during the 2021 M_W 7.1 Fukushima earthquake in Japan