Effect of site amplification on inelastic seismic response

Adhikary, Shrabony; Singh, Yogendra

doi:10.1007/s11803-019-0520-y

Cited by 6 publications

(2 citation statements)

References 41 publications

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“…Generally, earthquake waves form a set of simpler waves with different frequencies and amplitudes. The frequency of an earthquake indicates that the amplitude of these waves has expanded at different frequencies [12][13][14][15]. One of the methods for examining the frequency content is the Fourier spectrum.…”

Section: Introductionmentioning

confidence: 99%

Estimation of earthquake frequency content and its effect on dynamic analysis using continuous and discrete wavelet transform

et al. 2022

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Wavelet transform is one of the mathematical concepts for studying the frequency content of waves. It is divided into two groups of continuous and discrete. Generally, continuous wavelet transform is used to check the time-frequency and the discrete wavelet transform for filtering and noise reduction in waves. In this paper, for the first time, the combination of these two concepts is used for the earthquake acceleration wave. For this purpose, eight earthquakes from four different locations in the world have been selected. Initially, each earthquake is filtered up to 5 stages using a discrete wavelet transform. At each stage of the filter, two waves of approximations and details are obtained. Due to the close approximation of the frequency content of the wave to the original earthquake, the approximate wave is used for subsequent calculations. In the next stage, the spectrum of Fourier and the diagram of five of the frequency of dominant of the earthquake are plotted. Also, using the continuous wavelet transform, the time-frequency curves of the main earthquakes and the time-frequency curves of the wave obtained from the discrete wavelet transform are investigated. The goal is to find the best stage of a discrete wavelet filter based on frequency content to reduce computations to over 80%. In the next step, the study examines the time of the strong ground motion, the structure response of a single degree of freedom, and the dynamical response of the timing of the structure of a degree of freedom. By examining the above parameters, the best-performing wavelet transformation step is inferred.

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Section: Introductionmentioning

confidence: 99%

Estimation of earthquake frequency content and its effect on dynamic analysis using continuous and discrete wavelet transform

et al. 2022

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“…Over the years, the effectiveness of numerical simulation methods in the analysis of seismic response of land-based sites has been widely verified (Yang et al, 2011;Chen G. et al, 2015;Guoxing et al, 2015;Adhikary and Singh, 2019;Falcone et al, 2020), and it is an effective method to analyze the seismic response of the seabed by taking the analysis method of seismic response of land-based sites as a basis and further considering the influence of seawater.…”

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confidence: 99%

Nonlinear seismic response analysis of layered seabed considering seawater-seabed coupling effects

Fan,

Wang,

Chen

et al. 2023

Front. Mar. Sci.

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Earthquake in the sea area is an important factor affecting the safety of marine engineering construction, seabed site seismic response analysis is an important preliminary work for marine engineering construction. Based on a fluid-solid weak coupling model which could simulate seawater-seabed interaction, four typical borehole sections along the proposed tunnel at Qiongzhou strait are selected to establish layered seabed models for studying the seabed site seismic responses affected by the seawater, seabed soft sediments and bedrock earthquake motion under bidirectional seismic excitation, in which the dynamic nonlinearity of the seabed soft soil is simulated by a generalized non-Masing constitutive model (DCZ model). The result shows: the suppression effect of seawater on seabed seismic motion exists only in the shallow range of seabed (< 50 m), and the suppression effect on the vertical seismic response is higher than that along the horizontal direction; the suppression effect of seawater on the seabed surface seismic motion and the frequency response phenomenon of “high frequency suppression, low frequency amplification” of seabed seismic response is positively correlated with seawater depth; The mean lines of the horizontal and vertical spectrum β obtained by numerical calculation are higher than the design spectrum in the land code within several period ranges, and the possibility of adverse effects induced by seawater and seabed soft sedimentation on the seismic resistance of marine engineering should be considered.

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A preliminary proposal towards the revision of Indian seismic code considering site classification scheme, amplification factors and response spectra

Deoda

Adhikary

2020

Bull Earthquake Eng

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Effect of site amplification on inelastic seismic response

Cited by 6 publications

References 41 publications

Estimation of earthquake frequency content and its effect on dynamic analysis using continuous and discrete wavelet transform

Estimation of earthquake frequency content and its effect on dynamic analysis using continuous and discrete wavelet transform

Nonlinear seismic response analysis of layered seabed considering seawater-seabed coupling effects

A preliminary proposal towards the revision of Indian seismic code considering site classification scheme, amplification factors and response spectra

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