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Numerical Modelling of Rayleigh Wave in Homogeneous Soil Medium in Undamped Condition
https://orcid.org/http://orcid.org/0000-0003-1679-1233
In this study, the Rayleigh wave velocity, which is an important parameter in ground vibration analysis, is determined directly in an unbounded soil medium using numerical modelling with ABAQUS. The Rayleigh wave (R-wave) velocity is determined from the displacement time response of the finite element model at a single station for far-field condition. Using the results, a linear prediction equation is proposed to determine the R-wave velocity of the soil. For this a 2D finite element model coupled with infinite elements in the boundary is developed which is subjected to dynamic loading. After establishment of the presence of R wave in the soil medium using particle movement and validation of displacement time response with analytical models, the R wave velocity is determined using positive peak particle vertical displacement. The effect of material properties of soil medium, such as modulus of elasticity, density and Poisson ratio, on Rayleigh wave velocity are investigated using differential sensitivity analysis. The analysis shows that the modulus of elasticity has positive correlation with highest sensitivity coefficient whereas density and Poisson ratio have negative correlations with R wave velocity. A prediction equation is developed for R wave velocity for the input variables, the square root of specific modulus and Poisson ratio, using multiple linear regression in MATLAB. The accuracy and usefulness of the predictive equation is validated by comparing the predicted values of R wave velocity with values obtained from analytical model and field/lab measurements. Applying the predictive equation for the range of soil properties available in the literature, the R wave velocity of different soil types and conditions are evaluated, which can be used for the analysis and mitigation of ground vibration problems.
Numerical Modelling of Rayleigh Wave in Homogeneous Soil Medium in Undamped Condition
https://orcid.org/http://orcid.org/0000-0003-1679-1233
In this study, the Rayleigh wave velocity, which is an important parameter in ground vibration analysis, is determined directly in an unbounded soil medium using numerical modelling with ABAQUS. The Rayleigh wave (R-wave) velocity is determined from the displacement time response of the finite element model at a single station for far-field condition. Using the results, a linear prediction equation is proposed to determine the R-wave velocity of the soil. For this a 2D finite element model coupled with infinite elements in the boundary is developed which is subjected to dynamic loading. After establishment of the presence of R wave in the soil medium using particle movement and validation of displacement time response with analytical models, the R wave velocity is determined using positive peak particle vertical displacement. The effect of material properties of soil medium, such as modulus of elasticity, density and Poisson ratio, on Rayleigh wave velocity are investigated using differential sensitivity analysis. The analysis shows that the modulus of elasticity has positive correlation with highest sensitivity coefficient whereas density and Poisson ratio have negative correlations with R wave velocity. A prediction equation is developed for R wave velocity for the input variables, the square root of specific modulus and Poisson ratio, using multiple linear regression in MATLAB. The accuracy and usefulness of the predictive equation is validated by comparing the predicted values of R wave velocity with values obtained from analytical model and field/lab measurements. Applying the predictive equation for the range of soil properties available in the literature, the R wave velocity of different soil types and conditions are evaluated, which can be used for the analysis and mitigation of ground vibration problems.
Numerical Modelling of Rayleigh Wave in Homogeneous Soil Medium in Undamped Condition
https://orcid.org/http://orcid.org/0000-0003-1679-1233
In this study, the Rayleigh wave velocity, which is an important parameter in ground vibration analysis, is determined directly in an unbounded soil medium using numerical modelling with ABAQUS. The Rayleigh wave (R-wave) velocity is determined from the displacement time response of the finite element model at a single station for far-field condition. Using the results, a linear prediction equation is proposed to determine the R-wave velocity of the soil. For this a 2D finite element model coupled with infinite elements in the boundary is developed which is subjected to dynamic loading. After establishment of the presence of R wave in the soil medium using particle movement and validation of displacement time response with analytical models, the R wave velocity is determined using positive peak particle vertical displacement. The effect of material properties of soil medium, such as modulus of elasticity, density and Poisson ratio, on Rayleigh wave velocity are investigated using differential sensitivity analysis. The analysis shows that the modulus of elasticity has positive correlation with highest sensitivity coefficient whereas density and Poisson ratio have negative correlations with R wave velocity. A prediction equation is developed for R wave velocity for the input variables, the square root of specific modulus and Poisson ratio, using multiple linear regression in MATLAB. The accuracy and usefulness of the predictive equation is validated by comparing the predicted values of R wave velocity with values obtained from analytical model and field/lab measurements. Applying the predictive equation for the range of soil properties available in the literature, the R wave velocity of different soil types and conditions are evaluated, which can be used for the analysis and mitigation of ground vibration problems.
Numerical Modelling of Rayleigh Wave in Homogeneous Soil Medium in Undamped Condition
Indian Geotech J
Beena, K. S. (author) / Sandeep, M. N. (author)
Indian Geotechnical Journal ; 52 ; 55-69
2022-02-01
15 pages
Article (Journal)
Electronic Resource
English
Numerical Modelling of Rayleigh Wave in Homogeneous Soil Medium in Undamped Condition
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