A ground motion selection and modification method capturing response spectrum characteristics and variability of scenario earthquakes

Wang, Gang

doi:10.1016/j.soildyn.2010.11.007

Cited by 93 publications

(70 citation statements)

References 14 publications

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“…Recently, some scholars have shown that a well-selected ground-motion suite should match not only the target mean, but also the variation of the target spectrum (Jayaram et al, 2011;Wang, 2011). In other words, a suite of ground motions should be selected in performance-based earthquake engineering; the resulting ground-motion suite should properly capture the statistical distribution of ground motions under the given earthquake scenario, which is commonly specified by means, standard deviations, and inherent correlations (e.g., Baker and Jayaram, 2008;Wang and Du, 2012) of a target spectrum.…”

Section: Huang Et Al: Selecting Ground-motion Time Histories Frommentioning

confidence: 99%

“…In other words, a suite of ground motions should be selected in performance-based earthquake engineering; the resulting ground-motion suite should properly capture the statistical distribution of ground motions under the given earthquake scenario, which is commonly specified by means, standard deviations, and inherent correlations (e.g., Baker and Jayaram, 2008;Wang and Du, 2012) of a target spectrum. There are several ground-motion selection algorithms available in the literature (Baker, 2010;Jayaram et al, 2011;Wang, 2011). One of the recently proposed interactive tools is the Design Ground Motion Library (DGML), which allows for selecting a suite of modified ground motions (multiple by scale factors) on the basis of response spectral shape and the characteristics of the recordings such as magnitude, distances, faulting types, and site conditions .…”

Section: Huang Et Al: Selecting Ground-motion Time Histories Frommentioning

confidence: 99%

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A procedure to select ground-motion time histories for deterministic seismic hazard analysis from the Next Generation Attenuation (NGA) database

Huang

Zhu

2017

Nat. Hazards Earth Syst. Sci.

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Abstract. In performance-based seismic design, groundmotion time histories are needed for analyzing dynamic responses of nonlinear structural systems. However, the number of ground-motion data at design level is often limited. In order to analyze seismic performance of structures, ground-motion time histories need to be either selected from recorded strong-motion database or numerically simulated using stochastic approaches. In this paper, a detailed procedure to select proper acceleration time histories from the Next Generation Attenuation (NGA) database for several cities in Taiwan is presented. Target response spectra are initially determined based on a local ground-motion prediction equation under representative deterministic seismic hazard analyses. Then several suites of ground motions are selected for these cities using the Design Ground Motion Library (DGML), a recently proposed interactive ground-motion selection tool. The selected time histories are representatives of the regional seismic hazard and should be beneficial to earthquake studies when comprehensive seismic hazard assessments and site investigations are unavailable. Note that this method is also applicable to site-specific motion selections with the target spectra near the ground surface considering the site effect.

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Section: Huang Et Al: Selecting Ground-motion Time Histories Frommentioning

confidence: 99%

Section: Huang Et Al: Selecting Ground-motion Time Histories Frommentioning

confidence: 99%

A procedure to select ground-motion time histories for deterministic seismic hazard analysis from the Next Generation Attenuation (NGA) database

Huang

Zhu

2017

Nat. Hazards Earth Syst. Sci.

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“…The importance of capturing the variability in seismic analysis is reflected in the recent ATC-58-1 guideline [6], which recommended randomly gathering eleven ground motions from the chosen magnitude and distance bin and then scaling them to match the targeted spectrum value at the fundamental period of the structure. However, the randomness nature in the selection procedure makes it difficult to represent the true variability of ground motions [1].…”

Section: Ground Motion Selectionmentioning

confidence: 99%

“…Besides the spectral shape, the ground-motion characteristics important to the seismic response of the facility may also include the significant duration, number of strong shaking cycles, near-field directivity effects and pulse sequencing etc. It is necessary to specify the ranges of parameters over which searches are to be conducted and other limits and restrictions on the searches [1].…”

Section: Ground Motion Selectionmentioning

confidence: 99%

“…Due to the lack of recorded data for the design level earthquakes (which are usually rare events), it is critical to develop systematic methods and useful tools to select and modify from current ground motion databases to provide a group of earthquake motions that can realistically represent important aspects of the design motion controlling the nonlinear response of civil engineering facilities [1]. The best method for selecting and scaling ground motions will depend on the type of assessment being performed.…”

Section: Introductionmentioning

confidence: 99%

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Ground Motion Selection and Scaling in Practice

Najafi

Tehranizadeh

2015

Period. Polytech. Civil Eng.

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IntroductionSeismic provisions in current building codes and standards include rules for design of structures using nonlinear response history analysis in some conditions. Due to the lack of recorded data for the design level earthquakes (which are usually rare events), it is critical to develop systematic methods and useful tools to select and modify from current ground motion databases to provide a group of earthquake motions that can realistically represent important aspects of the design motion controlling the nonlinear response of civil engineering facilities [1]. The best method for selecting and scaling ground motions will depend on the type of assessment being performed. ATC-58-1 identifies three types of performance assessment: intensity, scenario, and time-based. Intensity-based assessments are the most common of the three types and compute the response of a building and its components for a specified intensity of ground shaking (this approach is the focus of this paper). A scenario-based assessment computes the response of a building to a user specified earthquake event, which is typically defined by earthquake magnitude and the distance between the earthquake source and the building site. A risk-based (referred to as time-based assessment in ATC-58-1) assessment provides information on response over a period of time (e.g., annual rates). This is the most comprehensive type of assessment and involves a number of intensity-based assessments over the range of ground motion levels of interest [2]. Despite the scenario-based assessment which computes the response of a building based on a specific earthquake event, intensity and time-based assessments have been conducted subjecting to a group of records. Time-based assessment acquires information of all occurred earthquakes which have been utilized to adjust hazard curve of the assessed region; so, as much as records could be provided, the confidence level will promote, so many researchers attempts to enlarge records category to reduce record-by-record variations incorporated in this type of assessment. However, intensity-based assessment deal with number of records represented by intensity measures (IM), like peak ground acceleration, spectral acceleration on fundamental period of the model or etc., which are scaled associated to the intensity assumed target spectrum. Therefore, although enlarge-

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Stochastic simulation of regionalized ground motions using wavelet packets and cokriging analysis

Huang

Wang

2014

Earthq Engng Struct Dyn

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Summary Performance‐based earthquake engineering often requires ground‐motion time‐history analyses to be performed, but very often, ground motions are not recorded at the location being analyzed. The present study is among the first attempt to stochastically simulate spatially distributed ground motions over a region using wavelet packets and cokriging analysis. First, we characterize the time and frequency properties of ground motions using the wavelet packet analysis. The spatial cross‐correlations of wavelet packet parameters are determined through geostatistical analysis of regionalized ground‐motion data from the Northridge and Chi‐Chi earthquakes. It is observed that the spatial cross‐correlations of wavelet packet parameters are closely related to regional site conditions. Furthermore, using the developed spatial cross‐correlation model and the cokriging technique, wavelet packet parameters at unmeasured locations can be best estimated, and regionalized ground‐motion time histories can be synthesized. Case studies and blind tests using data from the Northridge and Chi‐Chi earthquakes demonstrate that the simulated ground motions generally agree well with the actual recorded data. The proposed method can be used to stochastically simulate regionalized ground motions for time‐history analyses of distributed infrastructure and has important applications in regional‐scale hazard analysis and loss estimation. Copyright © 2014 John Wiley & Sons, Ltd.

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A ground motion selection and modification method capturing response spectrum characteristics and variability of scenario earthquakes

Cited by 93 publications

References 14 publications

A procedure to select ground-motion time histories for deterministic seismic hazard analysis from the Next Generation Attenuation (NGA) database

A procedure to select ground-motion time histories for deterministic seismic hazard analysis from the Next Generation Attenuation (NGA) database

Ground Motion Selection and Scaling in Practice

Stochastic simulation of regionalized ground motions using wavelet packets and cokriging analysis

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