Spectrum-matched ground motion selection method based on Siamese Convolutional Neural Networks

Zhao, Guochen; Xu, Longjun; Zhu, Xingji; Lin, Shibin; Xie, Lili

doi:10.1016/j.soildyn.2022.107515

Cited by 5 publications

(3 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…proposed a wavelet‐packets‐based algorithm for classifying acceleration pulses; and it is demonstrated that velocity pulses with different acceleration features can render clearly different structural responses 29–33 . Recently, Zhao et al 34 . developed an approach based on the Siamese convolutional neural networks, by which ground motions with similar pulse‐like features can be classified into various groups.…”

Section: Introductionmentioning

confidence: 99%

“…Both algorithms could be taken as possible options for extracting the pulse parameters. However, one limitation of applying the two methods is that the pulse‐like significance of a motion should be known a priori, meaning that the job of pulse‐classification must be done in advance with resort to, for example, the above revisited algorithms, 20–28, 34, 35 and thereby it is not clear if the above approaches would always locate the global minimum when ground motions with unknown pulse‐like features are to be processed. In addition, aligning only the peaks of the

{S_d} \times {S_v}

spectra between the pulse model and the ground motion in Mimoglou et al 88 .…”

Section: Introductionmentioning

confidence: 99%

“…Assuming that the waveform of a velocity pulse can be well represented by the Gabor wavelet, four key parameters (i.e., V pk , T p , N c and φ) are then required to be determined. Most of the previous studies 20–28, 34, 35 for identifying pulse‐like features can only be used to derive V pk and T p , while the trial‐and‐error procedure 56, 74, 85, 86 is usually not reproducible, and may converge to local rather than global minimums. Given the limitations of existing studies as well as the need for pulse parameters in the earthquake engineering community, we propose a progressive (step‐by‐step) iterative approach that can achieve a fully automated parameterization of the velocity pulse.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Automated parameterization of velocity pulses in near‐fault ground motions

Chang,

Wu,

Goda

2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Proper parameterization of near‐fault ground motions is of critical importance in earthquake engineering, and this process is traditionally performed by directly fitting an analytical pulse model to the original motion. Yet such a process is usually limited by the trial‐and‐error procedure, which is strongly dependent on the initial guesses and may converge to local rather than global minimums. In this study, we propose a progressive (step‐by‐step) iterative approach that can achieve a fully automated parameterization of the velocity pulse contained in near‐fault motions. Assuming that a velocity pulse can be characterized by a pulse model with four key parameters, the approach is conducted by iteratively matching the pulse model to the smoothed ground motion, and the parameterized pulse is analytically derived by best fitting to the smoothed motion not only in the time domain but also in the spectral domain. Specifically, the velocity time history of interest is initially smoothed by a moving average filter so that the low‐frequency content can be filtered out of the original motion, from which the pulse amplitude as well as its epoch is accordingly determined. The coherent velocity pulse is then progressively extracted by performing the nonlinear least‐square‐fitting of the pulse model to the filtered low‐frequency content, during which the remaining parameters, that is, the pulse period, the number of cycles and the phase of the pulse, are estimated successively. Finally, the above procedure is applied repeatedly to the original ground motion by changing an empirical factor controlling the extent of smoothing of the motion so that convergence to local minimums that frequently occurs in the trial‐and‐error procedure could be largely avoided, and best match of the spectrum of the extracted pulse to that of the original motion can be acquired. Fitting quality of the velocity pulses is examined by comparing with existing methods. Prospective applications of the proposed procedure include the stochastic simulations of near‐fault ground motions and parametric investigations of the influence of velocity pulses on various engineered structures.

show abstract

Section: Introductionmentioning

confidence: 99%

{S_d} \times {S_v}

spectra between the pulse model and the ground motion in Mimoglou et al 88 .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Automated parameterization of velocity pulses in near‐fault ground motions

Chang,

Wu,

Goda

2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

Selection and Scaling Approaches of Earthquake Time-Series for Structural Engineering Applications: A State-of-the-Art Review

Caicedo,

Karimzadeh,

Bernardo

et al. 2023

Arch Computat Methods Eng

View full text Add to dashboard Cite

Selection and scaling of ground motion records have been recognised as one of the major sources of bias and uncertainty in the seismic assessment of civil engineering structures. This review paper provides a comprehensive description from a critical point of view of the scaling and selection approaches of earthquake motions for structural engineering applications, emphasising works conducted in the last decade. The outline of content within this review is organised as follows: (1) Earlier works (research done before 2010); (2) Code-based selection and spectral matching; (3) Probabilistic assessment based on intensity measures; and (4) Use of simulated signals as an alternative to ground motion selection and scaling. The aim of this paper is to provide a wide understanding of current research on the scaling and selection of earthquake motions for structural engineering applications; therefore, it may serve as a suitable reference in forthcoming investigations.

show abstract