An empirical model for the mean period (Tm) of ground motions using the NGA-West2 database

Du, Wenqi

doi:10.1007/s10518-017-0088-8

Cited by 32 publications

(24 citation statements)

References 36 publications

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“…5 lies in the inclusion of the frequency content of the free-field motion, as expressed through T mff . Mean period of the free-field motion T mff has been recently correlated to the seismic event path and source properties, such as R epi and M w as well as the V s30 velocity [52]. Fig.…”

Section: Parametric Ssi Analyses and Ground Motion Parametersmentioning

confidence: 99%

Analytical expressions relating free-field and foundation ground motions in buildings with basement, considering soil-structure interaction

Sotiriadis

Klimis

Margaris

et al. 2020

Engineering Structures

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Section: Parametric Ssi Analyses and Ground Motion Parametersmentioning

confidence: 99%

Analytical expressions relating free-field and foundation ground motions in buildings with basement, considering soil-structure interaction

Sotiriadis

Klimis

Margaris

et al. 2020

Engineering Structures

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“…The PGA values of each recording coming from such stations was corrected for SSI effects according to Equation 2, as V S30 values are reported within the flatfile which supplements 34 and includes the relevant metadata. In order to estimate T m of free-field motions, the global model of Du, 40 which correlates T m with earthquake magnitude, rupture-to-site distance and V S30 , was implemented. Subsequently, Equation 3 was implemented.…”

Section: Discussion and Implementation Of Proposed Curvesmentioning

confidence: 99%

Improved correlation between foundation and free‐field ground motions through strong motion recordings and kinematic soil–structure interaction analyses

Sotiriadis

Klimis

Margaris

et al. 2021

Earthq Engng Struct Dyn

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The present study explores the effect of soil-structure interaction (SSI) on the foundation motion as recorded at accelerometric stations located at the basement of buildings through a large dataset employed from sites where both foundation and free-field ground motion recordings are available. The significance of such instrumentation is highlighted, in terms of assessing the high frequency filtering that occurs at the foundation level and its potential implication on ground motion prediction models (GMPMs) that are produced with these datasets. Based on the recorded data, analytical expressions relating foundation, and free-field motion intensity measures, which have been produced in a previous work, are verified. A sub-structure analysis procedure is extended to include the site and building characteristics of the recorded data. Nonlinear regression analyses are performed, utilizing numerous analysis results, to derive improved, robust analytical expressions, as well as, to include building characteristics. Residual analysis is performed to assess possible bias due to other variables, as well. The produced analytical expressions are validated against the recorded data and compared to the existing expressions in terms of prediction errors. The produced analytical expressions can be utilized for correcting motions recorded at the basement level of buildings to obtain estimates of free-field ground motions. The latter being "building-free" is most appropriate for the development of new generation GMPMs that are not biased by the influence of kinematic and inertial interaction. The impact of correcting ground motion data through the proposed analytical expressions is discussed through their implementation on recently published strong motion dataset.

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“…This will require the selection of a design earthquake scenario, defined by magnitude, distance and a number of standard deviations above the median. The mean period of the associated ground-motion can be estimated based on the ground-motion prediction equations proposed by Rathje et al [43] or Du [50] which can include site conditions and directivity e↵ects. Once T m and the corresponding structural characteristics are defined, the base shear, inter-storey shear or peak floor acceleration models described above can be used to predict the corresponding median structural response.…”

Section: Peak Floor Acceleration Factormentioning

confidence: 99%

Seismic shear and acceleration demands in multi-storey cross-laminated timber buildings

Demirci

Mariotti

Macorini

2019

Engineering Structures

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A realistic estimation of seismic shear demands is essential for the design and assessment of multi-storey buildings and for ensuring the activation of ductile failure modes during strong ground-motion. Likewise, the evaluation of seismic floor accelerations is fundamental to the appraisal of damage to non-structural elements and building contents. Given the relative novelty of tall timber buildings and their increasing popularity, a rigorous evaluation of their shear and acceleration demands is all the more critical and timely. For this purpose, this paper investigates the scaling of seismic shear and acceleration demands in multistorey cross-laminated timber (CLT) buildings and its dependency on various structural properties. Special attention is given to the influence of the frequency content of the ground-motion. A set of 60 CLT buildings of varying heights representative of a wide range of structural configurations is subjected to a large dataset of 1656 real earthquake records. It is demonstrated that the mean period (T m) of the ground-motion together with salient structural parameters such as building aspect ratio (), design force reduction factor (q) and panel subdivision () influence strongly the variation of base shear, storey shears and acceleration demands. Besides, robust regression models are used to assess and quantify the distribution of force and acceleration demands on CLT buildings. Finally, practical expressions for the estimation of base shears, inter-storey shears and peak floor accelerations are o↵ered.

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An empirical model for the mean period (Tm) of ground motions using the NGA-West2 database

Cited by 32 publications

References 36 publications

Analytical expressions relating free-field and foundation ground motions in buildings with basement, considering soil-structure interaction

Analytical expressions relating free-field and foundation ground motions in buildings with basement, considering soil-structure interaction

Improved correlation between foundation and free‐field ground motions through strong motion recordings and kinematic soil–structure interaction analyses

Seismic shear and acceleration demands in multi-storey cross-laminated timber buildings

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