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Michael H. Beaty

Michael H. Beaty
Beaty Engineering LLC

PhD

About

26
Publications
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531
Citations

Publications

Publications (26)
Conference Paper
Full-text available
Analyses of the expected seismic performance of earthen dams subject to potential liquefaction hazard are routinely performed for high hazard dams. The State of Practice has increasingly evolved from simplified methods to the use of fully-coupled seismic pore pressure generation and seismic deformation analyses using either finite difference or fin...
Article
The LEAP international collaboratory is introduced and its key objectives and main accomplishments during the planning phase of the US-LEAP (LEAP-2015) are presented. The main theme of LEAP-2015 was lateral spreading of sloping liquefiable soils. A summary of the results of the laboratory element tests performed on the selected soil (Ottawa F-65) i...
Conference Paper
Seismic performance of earthen dams subject to potential liquefaction hazard is of concern in both seismic risk assessment and design mitigation for dams. Seismic deformation analyses are increasingly utilized in evaluating and mitigating these hazards. It is important to assess different types of analytical approaches by means of their application...
Conference Paper
Seismic performance of earthen dams subject to potential liquefaction hazard is of concern in both seismic risk assessment and design mitigation for dams. Seismic deformation analyses are increasingly utilized in evaluating and mitigating these hazards. It is important to assess different types of analytical approaches employed by means of their ap...
Article
UBCSAND is an effective-stress constitutive model for estimating shear-induced deformations resulting from liquefaction. It is a practice-oriented tool that balances simplicity of formulation and use with the ability to address key aspects of the liquefaction problem. This paper discusses the challenges of applying a FLAC-UBCSAND modeling approach...
Article
The Liquefaction Experiments and Analysis Projects (LEAP) is an international effort to produce a set of high quality test data and to then use it in a validation exercise of existing computational models and simulation procedures for soil liquefaction analysis. A validation effort (LEAP-GWU 2015) was undertaken using a benchmark centrifuge model o...
Article
The LEAP international collaboratory is introduced and its key objectives and main accomplishments during the planning phase of the US-LEAP (LEAP-2015) are presented. The main theme of LEAP-2015 was lateral spreading of sloping liquefiable soils. A summary of the results of the laboratory element tests performed on the selected soil (Ottawa F-65) i...
Article
2017. The Liquefaction Experiments and Analysis Projects (LEAP) is an international effort to produce a set of high quality test data and to then use it in a validation exercise of existing computational models and simulation procedures for soil liquefaction analysis. A validation effort (LEAP-GWU 2015) was undertaken using a benchmark centrifuge m...
Conference Paper
Full-text available
Developing confidence in non-linear seismic deformation analyses of embankment dams, and the insights they may offer, is dependent on thorough internal or external reviews of the analysis procedures and results. Difficult geologic characterizations, selection and calibration of constitutive models, determination of material parameters, general limi...
Article
Deformation of bridge approach embankments caused by earthquake-induced liquefaction in the underlying soils can impose large force and displacement demands on the piled abutments. An equivalent static analysis (ESA) procedure that accounts for the beneficial coupling of the embankment displacements with the mobilized bridge/pile restraining forces...
Conference Paper
Full-text available
Accurate prediction of the cyclic mobility behavior associated with the undrained cyclic loading of sand under a nonzero static shear stress ratio can be important for numerically simulating earthquake-induced deformations of slopes. Experimental studies on the deformation of clean sands under undrained cyclic direct simple shear loading show a pro...
Article
Reducing seismic risk to electric power transmission systems in the Pacific Northwest requires innovative improvements to a wide range of infrastructure. The Bonneville Power Administration (BPA) identified four locations along the Columbia and Willamette Rivers near Portland, Oregon, where existing transmission crossings may be vulnerable to large...
Article
Earthquake-induced deformation of piled bridge abutments in approach embankments underlain by liquefied soils may be reduced by the restraining forces provided by the piles and bridge superstructure. Design methods accounting for these pinning effects have been applied in practice but lack significant comparison with actual physical data. Three dyn...
Conference Paper
Full-text available
The art of selecting and modifying recorded ground motions for use in nonlinear deformation analyses is an uncertain practice. Customary approaches rely on simple techniques originally developed for linear elastic analyses. When these same approaches are applied to nonlinear analyses of dams, especially those involving liquefiable soils, the result...
Article
Full-text available
To facilitate the design of seismic remediation for Tuttle Creek Dam in east central Kansas, a seismic finite difference analysis of the dam was performed using the software FLAC and the UBCSAND and UBCTOT soil constitutive models. The FLAC software has a key advantage because it can use calibrated site-specific constitutive models. Earlier deforma...
Conference Paper
Full-text available
Seismic deficiency of Success Dam, California has been determined and the need of remediation for improving the performance of the dam under earthquake loading has been identified. Consequently, the dam is currently operated under reservoir pool elevation restriction, pending rehabilitation implementation. Justification of operation restrictions an...
Article
Estimating deformations due to seismically induced liquefaction is often accomplished with a series of simplified uncoupled analyses. An alternative approach is presented in this paper that builds upon this common practice while making significant improvements to the modeling quality. A two-dimensional finite-difference analysis is performed in the...
Conference Paper
Full-text available
Success Dam located in Southern California is seismically deficient and remediation design is currently in progress. The proposed remediation includes partial excavation of the existing embankment dam and construction of a buttressing embankment immediately downstream. Liquefiable alluvium will remain under the existing dam and will continue to aff...
Article
The prediction of liquefaction and resulting displacements is a major concern for earth structures located in regions of moderate to high seismicity. Conventional procedures used to assess liquefaction commonly predict the triggering of liquefaction to depths of 50 m or more. Remediation to prevent or curtail liquefaction at these depths can be ver...
Article
Full-text available
SUMMARY The prediction of liquefaction and resulting displacements is a major concern for earth structures located in regions of moderate to high seismicity. Conventional procedures used to assess liquefaction commonly predict the triggering of liquefaction to depths of 50 m or more. Remediation to prevent or curtail liquefaction at these depths ca...
Article
An elastoplastic constitutive model is presented that simulates the liquefaction response of sands in a relatively uncomplicated manner. The model, UBCSAND, is based on the characteristic behaviour of the soil skeleton as observed in laboratory element tests. The model has several key features, including a hyperbolic relationship between stress rat...
Article
Thesis (Ph. D.)--University of British Columbia, 2001. Includes bibliographical references.

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