Earthquake Deformations

GeoStudio provides comprehensive tools for earthquake analysis.

The analytical challenge


Many regions of the globe are subjected to earthquakes and as such any geotechnical structure must be functional under extreme shaking events. Earthquakes can result in the generation of excess pore-water pressure which reduces effective strength and can lead to failure. Dynamic shaking can cause collapse of certain types of soils and dynamic inertial forces can result in permanent deformation. Loss of strength due to pore-pressure changes and collapse can also result in permanent plastic deformations.

The GeoStudio solution


GeoStudio’s QUAKE/W can be integrated with the entire suite of models to allow for dynamic analysis of earth structures. Users can perform a transient Newmark type analysis to determine deformations due to inertial forces. If excess pore-water pressure is generated in a QUAKE/W analysis, dissipation of these pressures can be considered within a seepage (SEEP/W) or stress-deformation model (SIGMA/W). Regions in which there have been a loss of strength and collapse can be identified and permanent plastic deformations can be estimated. Structural supports such as tie-back anchors and sheet pile walls can be included in the dynamic analysis.

Example analyses

Explore these GeoStudio analyses of earthquake deformations.

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Newmark Deformations

This example demonstrates how the results of a QUAKE/W analysis can be used in conjunction with SLOPE/W to estimate the permanent deformations that may occur as a result of the inertial forces associated with an earthquake. This type of permanent deformation analysis is referred to as a Newmark analysis.

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QUAKE/W - Proshake Comparison

ProShake is software for one-dimensional ground response analyses. It's a useful tool for checking the performance of QUAKE/W, since it is an independently developed product, and since it is based on a completely different formulation. Comparing results from these two products is a good way of validating the QUAKE/W formulation and implementation. This example gives the results of a comparison study for three different earthquake records.

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Shaking Tie-Back Wall

This example demonstrates how QUAKE/W can be used to analyze the response to shaking of a sheet-pile wall tied-back with anchors. The results illustrate the oscillation of forces in the structural components during an earthquake.

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Waba Dam Deformations

This example presents the results of a permanent deformation analysis of a low dam on a clay foundation. QUAKE/W is used to do a shaking analysis, and the results are then used in SIGMA/W to do a “Dynamic Deformation” type of analysis. The results are also compared with a Newmark-type of deformation analysis.

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Read the analysis details

Related products

GeoStudio includes four integrated products that work in combination to provide effective analysis of earthquake deformations.

 

SLOPE/W

Stability analysis of soil and rock slopes.

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SEEP/W

Finite element analysis of groundwater flow in saturated / unsaturated porous media.

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SIGMA/W

Finite element stress and deformation analysis of earth and structural materials.

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QUAKE/W

Finite element analysis of earthquake liquefaction and dynamic loading.

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Explore all solutions

GeoStudio's integrated products enable you to work across a broad range of engineering use cases.