Simplifications of CQC method and CCQC method

Yu, Ruifang; Zhou, Xiyuan

doi:10.1007/s11803-007-0640-7

Cited by 15 publications

(3 citation statements)

References 5 publications

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“…As the target intensity envelope is ( ), the energy build-up is regulated by 2 ( ) according to Parseval theorem [53]. Meanwhile, the instantaneous energy can also be approximately measured by the variance of the signal Var[ ( )], that can be calculated adopting Equation (8):…”

Section: Time-frequency Modulating Functionsmentioning

confidence: 99%

“…The first is the response-spectrum analysis (RSA), which is widely recommended in several national building codes [3][4][5]. This method is specific for the analysis of linear systems, and it is suitable for classically or nonclassically damped systems [6][7][8][9]. For the RSA, the input parameter is the design response spectra which can be obtained by seismic hazard assessment.…”

Section: Introductionmentioning

confidence: 99%

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A new energy‐compatible nonstationary stochastic ground‐motion simulation method

Wang

Risi

et al. 2021

Earthq Engng Struct Dyn

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A new time-frequency modulating function with a novel equivalent averageintensity envelope based on the instantaneous energy is proposed to simulate fully nonstationary ground motions. The new model utilizes simple, uncoupled, and statistically well-studied temporal and spectral nonstationary parameters. Then, a period-by-period simulation method based on the proposed stochastic model is developed to match multiple targets. A numerical comparison shows that the new method replicates well both the target temporal and spectral nonstationarities and it is efficient and easy to use in engineering practice. This study also demonstrates that for obtaining site-specific seismic input by means of site response analysis: (1) the frequency contents of bedrock motion, including the energy concentration in terms of frequency and frequency decaying with respect to time, have a significant impact on the site response with moderate and large PGA levels; (2) using the proposed instantaneous-frequency-related time modulating function to approximate the real ground motion leads to results sufficiently close to the record for nonlinear site response regardless PGA levels and site condition. Therefore, attention should be paid to the change of nonstationary characteristics of ground-motion frequency according to the source, path, and site condition when simulating ground motion on bedrock. As the proposed methods can approximately control various ground-motion characters, different targets of ground-motion simulation can be matched for different engineering purpose such as site response analysis, time-history analysis of special structures, etc.

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Section: Time-frequency Modulating Functionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new energy‐compatible nonstationary stochastic ground‐motion simulation method

Wang

Risi

et al. 2021

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

show abstract

“…Lou et al analyzed characteristics of blasting seismic waves and adopted integral values of response spectrum curves to investigate the relation between response spectrum and blasting vibration velocity/frequency [3]. Yu et al suggested empirical relations to predict the acceleration and velocity of ground motion excited by explosions [4]. Langston et al analyzed the spatial variation of strong ground motions induced by two explosions within unconsolidated sediments of the Mississippi embayment because there are no comparable strong-motion data from natural earthquakes in this area [5].…”

Section: Introductionmentioning

confidence: 99%

Energy Variation Characteristics of Exploding Ground Motion within Typical Loess Field of China

Sun

Wang

Tian

2012

AMR

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Based on in-situ observational data, we analyzed energy features of strong ground motion induced by short delay blasting in unsaturated loess field through three aspects of time history, frequency spectrum and attenuation. For time histories, the data show exploding ground motion has two essential characteristics, i.e. larger peak ground acceleration (PGA) and shorter duration. Analysis results reveal the effective duration (ground acceleration exceeding a certain magnitude) is the pivotal factor influencing design effects of the blasting. The spectral response, meanwhile, attenuates with the increase of observational distances (apart from the centre of exploding field), especially for those higher frequency components. Values of H/V figured relative features of horizontal component to vertical one of frequency spectrum of exploding ground vibration become greater while distances widen. As exploding energy accumulated, moreover, lower frequency energy distinctly increases and the feature of frequency spectrum of the strong shock gradually approaches an actual seismic oscillation.

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Response spectrum method for seismic soil–structure interaction analysis of underground structure

Zhao

Gao

et al. 2019

Bull Earthquake Eng

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Simplifications of CQC method and CCQC method

Cited by 15 publications

References 5 publications

A new energy‐compatible nonstationary stochastic ground‐motion simulation method

A new energy‐compatible nonstationary stochastic ground‐motion simulation method

Energy Variation Characteristics of Exploding Ground Motion within Typical Loess Field of China

Response spectrum method for seismic soil–structure interaction analysis of underground structure

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