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Doubly-Asymptotic, Boundary-Element Analysis of Nonlinear Soil-Structure Interaction

P. G. Underwood / T. L. Geers

This report describes a doubly-asymptotic (DA), boundary-element (BE) treatment of a surrounding nonlinear soil medium for dynamic soil-structure interaction analysis. Linear soil-structure interaction is reduced to a surface relationship that is asymptotically exact at both high and low frequencies. Nonlinear soil-structure interaction is treated similarly, except a volume contribution is added in the volume; a quasi-static and quasi-dynamic (axisymmetric) problem for which finite-element solutions have been obtained for comparison. For soil behavior based on J sub 2-plasticity theory, reasonable agreement is obtained. For soil behavior based on the Cap model, which is a combined I sub 1- and J sub 2-plasticity theory agreement is not obtained.

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Doubly-Asymptotic, Boundary-Element Analysis of Nonlinear Soil-Structure Interaction

P. G. Underwood / T. L. Geers

This report describes a doubly-asymptotic (DA), boundary-element (BE) treatment of a surrounding nonlinear soil medium for dynamic soil-structure interaction analysis. Linear soil-structure interaction is reduced to a surface relationship that is asymptotically exact at both high and low frequencies. Nonlinear soil-structure interaction is treated similarly, except a volume contribution is added in the volume; a quasi-static and quasi-dynamic (axisymmetric) problem for which finite-element solutions have been obtained for comparison. For soil behavior based on J sub 2-plasticity theory, reasonable agreement is obtained. For soil behavior based on the Cap model, which is a combined I sub 1- and J sub 2-plasticity theory agreement is not obtained.

Doubly-Asymptotic, Boundary-Element Analysis of Nonlinear Soil-Structure Interaction

P. G. Underwood / T. L. Geers

This report describes a doubly-asymptotic (DA), boundary-element (BE) treatment of a surrounding nonlinear soil medium for dynamic soil-structure interaction analysis. Linear soil-structure interaction is reduced to a surface relationship that is asymptotically exact at both high and low frequencies. Nonlinear soil-structure interaction is treated similarly, except a volume contribution is added in the volume; a quasi-static and quasi-dynamic (axisymmetric) problem for which finite-element solutions have been obtained for comparison. For soil behavior based on J sub 2-plasticity theory, reasonable agreement is obtained. For soil behavior based on the Cap model, which is a combined I sub 1- and J sub 2-plasticity theory agreement is not obtained.

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Title:

Doubly-Asymptotic, Boundary-Element Analysis of Nonlinear Soil-Structure Interaction

Contributors:

P. G. Underwood (author) / T. L. Geers (author)

Publication date:

1979

Size:

69 pages

Type of media:

Report

Type of material:

No indication

Language:

English

Keywords:

Soil & Rock Mechanics , Elastic properties , Approximation(Mathematics) , Boundaries , Soils , Soil structure interaction

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