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Investigating the efficiency of machine learning algorithms in classifying pulse-like ground motions

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Abstract

Machine learning approaches are increasingly being employed to forecast the key characteristics of strong ground motions, including the challenging classification of Pulse-Like (PL) ground motions. The PL ground motions are characterized by their impulsive nature and have the potential to cause significant damage to structures. The classification of PL ground motions continues to be a significant challenge due to the absence of consensus on their definition and categorization. This paper investigates the potential benefits of several Machine Learning Classifiers (MLCs) algorithms such as decision tree, random forest, logistic regression, naive Bayes, support vector machine, K-nearest neighbor, ensemble model, and artificial neural network models for predicting PL and Non-Pulse-Like (NPL) ground motions. In this regard, a dataset comprising 200 near-fault ground motions records compiled from active tectonic regions like Taiwan, Turkey, Iran, and Japan, was divided into 2 portions, with 75% used to train the model and the remaining 25% used for testing. Plots of performance metrics, confusion matrix, and receiver operating curve indicate that the ensemble classifier outperforms the other classifier with 86.2% accuracy and the lowest misclassification of PL and NPL ground motions. Additionally, the trained MLC has been compared with the existing ground motion classification models to further assess the accuracy of the different classifiers in the present study.

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Authors

Contributions

Faisal Mehraj Wani: conceptualization, methodology, writing—original draft preparation; Jayaprakash Vemuri: methodology, writing, resources; Chenna Rajaram: writing—review and editing, data curation; K.S.K. Karthik Reddy: investigation, formal analysis, review and editing.

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Correspondence to Faisal Mehraj Wani.

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Appendices

Appendix 1

Table 6

Table 6 Key ground motions parameters

Appendix 2

Figure 11

Fig. 11
figure 11

Correlation matrix of ground motion parameters

Appendix 3

Table 7

Table 7 Classification score of different classifiers used in the study
$$\mathrm{Precision}=\frac{\mathrm{TP}}{\mathrm{TP}+\mathrm{FP}}$$
$$\mathrm{Recall}=\frac{\mathrm{TP}}{\mathrm{TP}+\mathrm{FN}}$$
$$\mathrm{F}1\mathrm{Score}=\frac{2*\mathrm{Precision}*\mathrm{Recall}}{\mathrm{Precision}+\mathrm{ Recall}}$$

where TP = True positive.

FP=False positive

FN=False negative

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Wani, F.M., Vemuri, J., Rajaram, C. et al. Investigating the efficiency of machine learning algorithms in classifying pulse-like ground motions. J Seismol 27, 875–899 (2023). https://doi.org/10.1007/s10950-023-10168-2

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  • DOI: https://doi.org/10.1007/s10950-023-10168-2

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