Nonlinear Regression Prediction of Mechanical Properties for SMA-Confined Concrete Cylindrical Specimens
In order to achieve active confinement in concrete elements, researchers have recently employed smart materials called shape memory alloys (SMA). Several empirical relationships have been widely used to predict the behavior of confined concrete. To develop more accurate relations for predicting the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/1/112 |
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| author | Saeed Eilbeigi Mohammadreza Tavakkolizadeh Amir R. Masoodi |
| author_facet | Saeed Eilbeigi Mohammadreza Tavakkolizadeh Amir R. Masoodi |
| author_sort | Saeed Eilbeigi |
| collection | DOAJ |
| description | In order to achieve active confinement in concrete elements, researchers have recently employed smart materials called shape memory alloys (SMA). Several empirical relationships have been widely used to predict the behavior of confined concrete. To develop more accurate relations for predicting the behavior of concrete actively confined with SMA spirals, it is necessary to obtain new relations for determining the peak compressive stress and the corresponding strain in addition to the ultimate stress and strain. For this purpose, existing data from 42 specimens of plain concrete cylindrical specimens confined with SMA spirals and subjected to uniaxial compression were collected. Then, by using MATLAB and SigmaPlot software, nonlinear regression analyses were conducted to obtain the optimum relations. The best equations were selected using multiple error criteria of root mean square error (RMSE) and R-squared (R<sup>2</sup>). Finally, the accuracy of the proposed relations was compared to the existing relations for active concrete confinement which showed better accuracy. |
| first_indexed | 2024-03-09T13:20:51Z |
| format | Article |
| id | doaj.art-dff1cedff61b4ab29c1ed0a05d0caa97 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T13:20:51Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-dff1cedff61b4ab29c1ed0a05d0caa972023-11-30T21:30:03ZengMDPI AGBuildings2075-53092022-12-0113111210.3390/buildings13010112Nonlinear Regression Prediction of Mechanical Properties for SMA-Confined Concrete Cylindrical SpecimensSaeed Eilbeigi0Mohammadreza Tavakkolizadeh1Amir R. Masoodi2Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad 9177948974, IranDepartment of Civil Engineering, Ferdowsi University of Mashhad, Mashhad 9177948974, IranDepartment of Civil Engineering, Ferdowsi University of Mashhad, Mashhad 9177948974, IranIn order to achieve active confinement in concrete elements, researchers have recently employed smart materials called shape memory alloys (SMA). Several empirical relationships have been widely used to predict the behavior of confined concrete. To develop more accurate relations for predicting the behavior of concrete actively confined with SMA spirals, it is necessary to obtain new relations for determining the peak compressive stress and the corresponding strain in addition to the ultimate stress and strain. For this purpose, existing data from 42 specimens of plain concrete cylindrical specimens confined with SMA spirals and subjected to uniaxial compression were collected. Then, by using MATLAB and SigmaPlot software, nonlinear regression analyses were conducted to obtain the optimum relations. The best equations were selected using multiple error criteria of root mean square error (RMSE) and R-squared (R<sup>2</sup>). Finally, the accuracy of the proposed relations was compared to the existing relations for active concrete confinement which showed better accuracy.https://www.mdpi.com/2075-5309/13/1/112active confinementSMA spiralsregression analysispeak stressultimate stressaxial strain |
| spellingShingle | Saeed Eilbeigi Mohammadreza Tavakkolizadeh Amir R. Masoodi Nonlinear Regression Prediction of Mechanical Properties for SMA-Confined Concrete Cylindrical Specimens Buildings active confinement SMA spirals regression analysis peak stress ultimate stress axial strain |
| title | Nonlinear Regression Prediction of Mechanical Properties for SMA-Confined Concrete Cylindrical Specimens |
| title_full | Nonlinear Regression Prediction of Mechanical Properties for SMA-Confined Concrete Cylindrical Specimens |
| title_fullStr | Nonlinear Regression Prediction of Mechanical Properties for SMA-Confined Concrete Cylindrical Specimens |
| title_full_unstemmed | Nonlinear Regression Prediction of Mechanical Properties for SMA-Confined Concrete Cylindrical Specimens |
| title_short | Nonlinear Regression Prediction of Mechanical Properties for SMA-Confined Concrete Cylindrical Specimens |
| title_sort | nonlinear regression prediction of mechanical properties for sma confined concrete cylindrical specimens |
| topic | active confinement SMA spirals regression analysis peak stress ultimate stress axial strain |
| url | https://www.mdpi.com/2075-5309/13/1/112 |
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