Prediction of earthquake energy input from smoothed fourier amplitude spectrum

Kuwamura, Hitoshi; Kirino, Yasunori; Akiyama, Hiroshi

doi:10.1002/eqe.4290231007

Cited by 79 publications

(21 citation statements)

References 3 publications

(1 reference statement)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corner period (T c ) is determined either Fourier spectrum or undamped velocity spectrum of the record. 9 The beginning period of the plateau is calculated as T c /1.2 to consider that plastic deformations increase natural period and rise the energy imparted into nonlinear system. 5 The descending branch (partition 3) is formed by the term…”

Section: Suggestion Of a New Input Energy Spectrummentioning

confidence: 99%

An improved input energy spectrum verified by the shake table tests

Güllü

Yüksel

Yalçın

et al. 2018

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Summary Input energy is the principal component of the energy balance equation. It is beneficial to determine, through its components, how the recoverable and irrecoverable energies are distributed within the structural elements. Several equations and attenuation relations to define mass‐normalized input energy spectra exist in the literature. They are mainly proposed for elastic systems subjected to far‐fault EQs. There is a lack of experimental verification of these proposed spectra. In this paper, experimental assessment was performed to the existing spectra, and further improvements were accomplished. For this purpose, steel cantilever columns were tested on the shake table for two specific historical EQs coincidently having similar spectral acceleration values. Based on the experimental results, a three‐part mass‐normalized relative input energy spectrum was formulated including soil type, EQ (corner period, intensity, duration, spectral acceleration, and velocity), and structural behavioral characteristics (period and structural damping). The proposed input energy spectrum was experimentally calibrated and numerically validated for various EQs featuring near‐ and far‐field types. Analytical and experimental comparisons were made between the previously developed spectrum and the newly proposed one. The validation studies and the statistical evaluations exposed that the proposed spectrum yielded better agreement with the experimental and numerical results.

show abstract

Section: Suggestion Of a New Input Energy Spectrummentioning

confidence: 99%

An improved input energy spectrum verified by the shake table tests

Güllü

Yüksel

Yalçın

et al. 2018

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

“…It can be seen that, as the damping becomes larger, the energy spectrum becomes smoother. This phenomenon is related to the so-called 'smoothing of Fourier amplitude spectrum' (approximately equivalent to zero-damping velocity response spectrum) [34]. Fig.19 shows the time variation of input energy from the ground motion recorded at K-NET Shinjuku station (TKY007, NS) for various damping ratios.…”

Section: Representation Of Uncertainty Of Long-period Ground Motion Bmentioning

confidence: 99%

Uncertainties in long-period ground motion and its impact on building structural design: Case study of the 2011 Tohoku (Japan) earthquake

Takewaki

Fujita

Yoshitomi

2013

Engineering Structures

View full text Add to dashboard Cite

On March 11, 2011, Japan was shaken by the 2011 off the Pacific coast of Tohoku earthquake (the Great East Japan Earthquake). This paper reports some aspects of this earthquake and its impact on building structural design. It was reported that long-period ground motions were induced extensively in Tokyo, Nagoya and Osaka. The response of high-rise buildings to the recorded ground motions during this earthquake and the simulated ground motions provided by the Japanese Government is discussed from the viewpoint of resonance and critical excitation. It is shown finally that the earthquake input energy and its bound analysis lead to clearer understanding of the effect of long-period ground motion on building structural design.

show abstract

“…Input energy can be defined either in absolute or relative terms [10] where both energy terms yield almost similar results in the period range of practical interest. Input energy equivalent velocity (V eq ) spectra of damped elastic SDOF systems can also be predicted quite accurately by using smoothed Fourier amplitude spectrum of the input acceleration record [11,12].Input energy design spectra can be estimated from the basic strong motion intensity and hazard parameters, which inherently depend on the source and site characteristics. Peak ground acceleration (PGA), peak ground velocity (PGV), PGV to PGA ratio (V/A ratio), effective duration, predominant period of ground motions, distance to fault, fault type, local soil condition, and earthquake magnitude were identified as the distinctive parameters for determining the input energy spectra of earthquake ground motions in the past [5][6][7][8][9][10].…”

mentioning

confidence: 99%

Prediction of input energy spectrum: attenuation models and velocity spectrum scaling

Alıcı

Sucuoğlu

2016

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

SUMMARYRecent improvements in performance-based earthquake engineering require realistic description of seismic demands and accurate estimation of supplied capacities in terms of both forces and deformations. Energy based approaches have a significant advantage in performance assessment because excitation and response durations, accordingly energy absorption and dissipation characteristics, are directly considered whereas force and displacement-based procedures are based only on the maximum response parameters. Energybased procedures mainly consist of the prediction of earthquake input energy imposed on a structural system during an earthquake and energy dissipation performance of the structure.The presented study focuses on the prediction of earthquake input energy. A large number of strongground motions have been collected from the Next Generation Attenuation (NGA) project database, and parametric studies have been conducted for considering the effects of soil type, epicentral distance, moment magnitude, and the fault type on input energy. Then prediction equations for input energy spectra, which are expressed in terms of the equivalent velocity (V eq ) spectra, are derived in terms of these parameters. Moreover, a scaling operation has been developed based on consistent relations between pseudo velocity (PS V ) and input energy spectra. When acceleration and accordingly velocity spectrum is available for a site from probabilistic seismic hazard analysis, it is possible to estimate the input energy spectrum by applying velocity scaling. Both of these approaches are found successful in predicting the V eq spectrum at a site, either from attenuation relations for the considered earthquake source or from the results of probabilistic seismic hazard analysis conducted for the site.

show abstract

Prediction of earthquake energy input from smoothed fourier amplitude spectrum

Cited by 79 publications

References 3 publications

An improved input energy spectrum verified by the shake table tests

An improved input energy spectrum verified by the shake table tests

Uncertainties in long-period ground motion and its impact on building structural design: Case study of the 2011 Tohoku (Japan) earthquake

Prediction of input energy spectrum: attenuation models and velocity spectrum scaling

Contact Info

Product

Resources

About