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Rock tensile strength prediction using empirical and soft computing approaches

The tensile strength of rocks plays an important role in site investigation during the initial phase of many construction projects. However, laboratory tests as direct methods for tensile strength prediction are not considered efficient in terms of time and cost. The present study is focused on deve...

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Main Authors:	Mahdiyar, Amir, Armaghani, Danial Jahed, Marto, Aminaton, Nilashi, Mehrbakhsh, Ismail, Syuhaida
Format:	Article
Published:	Springer Verlag 2019
Subjects:	QA75 Electronic computers. Computer science T Technology (General)
Online Access:	http://eprints.utm.my/id/eprint/87409/ http://dx.doi.org/10.1007/s10064-018-1405-4
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spelling	my.utm.874092020-11-08T03:59:21Z http://eprints.utm.my/id/eprint/87409/ Rock tensile strength prediction using empirical and soft computing approaches Mahdiyar, Amir Armaghani, Danial Jahed Marto, Aminaton Nilashi, Mehrbakhsh Ismail, Syuhaida QA75 Electronic computers. Computer science T Technology (General) The tensile strength of rocks plays an important role in site investigation during the initial phase of many construction projects. However, laboratory tests as direct methods for tensile strength prediction are not considered efficient in terms of time and cost. The present study is focused on developing new hybrid intelligent models for rock tensile strength prediction. Rock samples which were gathered from a tunnel in Malaysia were subjected to testing in the laboratory to prepare a database comprising 80 datasets for analysis. These rock index tests include Schmidt hammer test, dry density test, and point load test, together with the Brazilian tensile strength (BTS). Moreover, simple regression analysis was conducted and the results showed that a model with multiple inputs needs to be developed for tensile strength prediction. Subsequently, three hybrid intelligent systems, namely, an imperialist competitive algorithm (ICA)-artificial neural network (ANN), a genetic algorithm (GA)-ANN, and a particle swarm optimization (PSO)-ANN, were developed for estimating the tensile strength of rocks. In fact, the ICA, PSO, and GA were employed for weight and bias adjustments in ANN models. The values of the variance accounted for (VAF), coefficient of determination (R2), and root mean square error (RMSE) were obtained for the evaluation of the developed hybrid models. For the training datasets of the GA-ANN, PSO-ANN, and ICA-ANN models, R2 values of 0.911, 0.933, and 0.923, respectively, were obtained. On the other hand, R2 values of the testing datasets of the GA-ANN, PSO-ANN, and ICA-ANN models were 0.912, 0.929, and 0.920, respectively. The results showed that, although all the developed predictive models can predict the BTS within acceptable levels of accuracy, the PSO-ANN predictive model provided the best performance. Consequently, it was concluded that, due to the higher capability of the PSO-ANN model, it could be introduced as a new model for the prediction of the tensile strength of rocks. Springer Verlag 2019-09-01 Article PeerReviewed Mahdiyar, Amir and Armaghani, Danial Jahed and Marto, Aminaton and Nilashi, Mehrbakhsh and Ismail, Syuhaida (2019) Rock tensile strength prediction using empirical and soft computing approaches. Bulletin of Engineering Geology and the Environment, 78 (6). pp. 4519-4531. ISSN 1435-9529 http://dx.doi.org/10.1007/s10064-018-1405-4 DOI:10.1007/s10064-018-1405-4
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	QA75 Electronic computers. Computer science T Technology (General)
spellingShingle	QA75 Electronic computers. Computer science T Technology (General) Mahdiyar, Amir Armaghani, Danial Jahed Marto, Aminaton Nilashi, Mehrbakhsh Ismail, Syuhaida Rock tensile strength prediction using empirical and soft computing approaches
description	The tensile strength of rocks plays an important role in site investigation during the initial phase of many construction projects. However, laboratory tests as direct methods for tensile strength prediction are not considered efficient in terms of time and cost. The present study is focused on developing new hybrid intelligent models for rock tensile strength prediction. Rock samples which were gathered from a tunnel in Malaysia were subjected to testing in the laboratory to prepare a database comprising 80 datasets for analysis. These rock index tests include Schmidt hammer test, dry density test, and point load test, together with the Brazilian tensile strength (BTS). Moreover, simple regression analysis was conducted and the results showed that a model with multiple inputs needs to be developed for tensile strength prediction. Subsequently, three hybrid intelligent systems, namely, an imperialist competitive algorithm (ICA)-artificial neural network (ANN), a genetic algorithm (GA)-ANN, and a particle swarm optimization (PSO)-ANN, were developed for estimating the tensile strength of rocks. In fact, the ICA, PSO, and GA were employed for weight and bias adjustments in ANN models. The values of the variance accounted for (VAF), coefficient of determination (R2), and root mean square error (RMSE) were obtained for the evaluation of the developed hybrid models. For the training datasets of the GA-ANN, PSO-ANN, and ICA-ANN models, R2 values of 0.911, 0.933, and 0.923, respectively, were obtained. On the other hand, R2 values of the testing datasets of the GA-ANN, PSO-ANN, and ICA-ANN models were 0.912, 0.929, and 0.920, respectively. The results showed that, although all the developed predictive models can predict the BTS within acceptable levels of accuracy, the PSO-ANN predictive model provided the best performance. Consequently, it was concluded that, due to the higher capability of the PSO-ANN model, it could be introduced as a new model for the prediction of the tensile strength of rocks.
format	Article
author	Mahdiyar, Amir Armaghani, Danial Jahed Marto, Aminaton Nilashi, Mehrbakhsh Ismail, Syuhaida
author_facet	Mahdiyar, Amir Armaghani, Danial Jahed Marto, Aminaton Nilashi, Mehrbakhsh Ismail, Syuhaida
author_sort	Mahdiyar, Amir
title	Rock tensile strength prediction using empirical and soft computing approaches
title_short	Rock tensile strength prediction using empirical and soft computing approaches
title_full	Rock tensile strength prediction using empirical and soft computing approaches
title_fullStr	Rock tensile strength prediction using empirical and soft computing approaches
title_full_unstemmed	Rock tensile strength prediction using empirical and soft computing approaches
title_sort	rock tensile strength prediction using empirical and soft computing approaches
publisher	Springer Verlag
publishDate	2019
url	http://eprints.utm.my/id/eprint/87409/ http://dx.doi.org/10.1007/s10064-018-1405-4
_version_	1683230763677384704
score	13.211869

Rock tensile strength prediction using empirical and soft computing approaches

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