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Thematische Bibliographien / Geotechnical Problems Of The Witwatersrand / Dissertationen

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Dissertationen zum Thema „Geotechnical Problems Of The Witwatersrand“

Autor: Grafiati

Veröffentlicht am 30. Juni 2021

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1

DYMINSKI, ANDREA SELL. "ANALYSIS OF GEOTECHNICAL PROBLEMS WITH NEURAL NETWORKS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2000. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2001@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Nos últimos anos, a aplicação da técnica de redes neurais tem sido difundida em diversas áreas do conhecimento, inclusive na engenharia civil. Em meados da década de 90, iniciaram-se no Brasil estudos no sentido de avaliar a eficiência desta técnica numérica na modelagem do comportamento de solos e na análise de problemas envolvendo engenharia geotécnica. Este trabalho é resultado de parte destes estudos, onde algumas das potencialidades do uso das redes neurais em geotecnia podem ser observadas. São apresentadas três apli

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2

Bryant, Lee Davis. "Geotechnical Problems with Pyritic Rock and Soil." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/33060.

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Oxidation of pyrite can significantly affect properties and the behavior of soil and rock in civil construction. Problems with pyritic rock and soil extend globally and across many disciplines. Consequences of pyrite oxidation include heave, concrete degradation, steel corrosion, environmental damage, acid mine drainage, and accelerated weathering of rock with concomitant effects on strength and stability. Affected disciplines include soil science, mining, engineering geology, geochemistry, environmental engineering, and geotechnical engineering. <p> While pyrite problems may be well known i

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3

Wan, Richard. "Finite element implementation of some conventional geotechnical problems." Thesis, University of Ottawa (Canada), 1985. http://hdl.handle.net/10393/4576.

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4

Zhou, Hongjie. "Numerical study of geotechnical penetration problems for offshore applications." University of Western Australia. Centre for Offshore Foundation Systems, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0239.

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The research carried out in this thesis has concentrated on the application of numerical solutions to geotechnical penetration problems in offshore engineering. Several important issues closely relevant to deep-water oil and gas developments were investigated, covering installation of suction caisson foundations, interpretation of fullflow penetrometers and shallow penetration of a cylindrical object (submarine pipeline or T-bar), all in clayey sediments such as are often encountered in deep-water sites. These problems are commonly characterised by large vertical movements of structural elemen

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Panayides, Stylianos. "Modelling the effects of structure degradation in geotechnical problems." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2438.

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Bond degradation is an irreversible phenomenon that, experimentally, appears to be controlled by plastic strain accumulation. Conventional constitutive soil models do not capture the effects of small strain non‐linearity, recent stress history as well as material structure and its consequent reduction due to bond degradation. The aim of this thesis is to investigate the behaviour of a constitutive model that describes the initial structure, on various geotechnical problems. The kinematic hardening structured constitutive model (Rouainia and Muir Wood, 2000) ,formulated within a framework of ki

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Meier, Thomas. "Application of hypoplastic and viscohypoplastic constitutive models for geotechnical problems /." Karlsruhe, 2009. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=017703818&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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7

Santos, Rodríguez Cristian de. "Backanalysis methodology based on multiple optimization techniques for geotechnical problems." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/334179.

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Nowadays, thanks to the increase of computers capability to solve huge and complex problems, and also thanks to the endless effort of the geotechnical community to define better and more sophisticated constitutive models, the challenge to predict and simulate soil behavior has been eased. However, due to the increase in that sophistication, the number of parameters that define the problem has also increased. Moreover, frequently, some of those parameters do not have a real geotechnical meaning as they just come from mathematical expressions, which makes them difficult to identify. As a consequ

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Orazalin, Zhandos Y. "Analysis of large deformation offshore geotechnical problems in soft clay." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111442.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 269-281).<br>Although finite element (FE) methods are well established for modeling geotechnical problems in soil masses and soil-structure interaction, most prior research on large deformation problems has been limited to simplified assumptions on drainage conditions and constitutive behavior. This thesis investigates two large deformation problems in soft clay and proposes a methodology for perfo

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Meier, Thomas. "Application of hypoplastic and viscohypoplastic constitutive models for geotechnical problems." Karlsruhe Inst. für Bodenmechanik und Felsmechanik, 2008. http://d-nb.info/995827281/04.

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10

Janrungautai, Sirisin. "The Study on Uncertainty Modeling and Risk Analysis Geotechnical Problems." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148293.

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11

Laidlaw, James Stuart. "Tomographic techniques and their application to geotechnical and groundwater flow problems." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/28493.

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Most downhole tools in use today measure properties immediately adjacent to the borehole, and as such, only a small portion of the subsurface volume is known with any degree of certainty. When dealing with geologic situations which are characteristically heterogeneous, the engineer often requires more information than what present tests can provide. Tomography is an in-situ testing method that allows the generation of a two dimensional subsurface image by reconstructing material property variations between boreholes. It is essentially a solution to the inverse problem where signals are measur

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Sun, Tek-kei, and 孫廸麒. "Numerical modeling of skin friction and penetration problems in geotechnical engineering." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/195991.

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Numerical modeling using finite element method (FEM) is well-recognized as a powerful method for both engineers and researchers to solve boundary value problems. In the modeling of geotechnical problems, the analyses are often limited to simple static problems with either steady-state effective or total stress approach while the transient response (development and dissipation of excess pore water pressure, uex) is seldom considered. Besides, infinitesimal small soil deformation is usually assumed. The simulation is further complicated when the soil-structure interaction problems involve signif

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Wang, Zhe. "Numerical simulations of geotechnical engineering problems considering the principal stress rotation." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/32610/.

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Soil behaviors are quite complex under dynamic loadings, such as wave loading, earthquake loading, etc, but they share common characteristics that the soil is subjected to considerable principal stress rotations (PSR). PSR can generate plastic deformation even without a change of principal stress magnitudes. Continuous PSR can also generate excess pore water pressures and cumulative shear strains in undrained condition. Therefore, the PSR from the dynamic loadings can accelerate undrained soil liquefaction because it can cause cumulative plastic volumetric deformations. Ignoring PSR induced de

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Bandara, Samila Sanjeevanie. "Material point method to simulate large deformation problems in fluid-saturated granular medium." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/283928.

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15

Zhang, Li Zhi. "Application of Bayesian model class selection on differential problems in geotechnical engineering." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2590616.

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16

Hardy, Stuart. "The implementation and application of dynamic finite element analysis to geotechnical problems." Thesis, Imperial College London, 2003. http://hdl.handle.net/10044/1/7146.

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17

Prasad, Anamika 1979. "Development of user interface for numerical limit analysis of geotechnical stability problems." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/85751.

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18

Serna, Marcelo Alejandro Llano. "Experimental and numerical study of geotechnical problems using the material point method." reponame:Repositório Institucional da UnB, 2016. http://repositorio.unb.br/handle/10482/22294.

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Tese (doutorado)—Universidade de Brasília, Faculdade de Tecnologia, Programa de Pós-Graduação em Geotecnia, 2016.<br>Submitted by Fernanda Percia França (fernandafranca@bce.unb.br) on 2016-11-24T15:02:37Z No. of bitstreams: 1 2016_MarceloAlejandroLlanoSerna.pdf: 4597920 bytes, checksum: d1815fd743fd8c6b5479aca9482e7686 (MD5)<br>Approved for entry into archive by Raquel Viana(raquelviana@bce.unb.br) on 2017-01-28T19:32:06Z (GMT) No. of bitstreams: 1 2016_MarceloAlejandroLlanoSerna.pdf: 4597920 bytes, checksum: d1815fd743fd8c6b5479aca9482e7686 (MD5)<br>Made available in DSpace on 2017-01-28T19:

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Dar, Abdul Rashid. "Development of a flexible shear-stack for shaking table testing of geotechnical problems." Thesis, University of Bristol, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358124.

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20

FARFAN, ALDO DURAND. "APPLICATIONS OF LIMIT ANALYSIS TO GEOTECHNICAL PROBLEMS MODELLED AS CONVENTIONAL AND COSSERAT CONTINUA." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2000. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2000@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O presente trabalho trata da aplicação da análise limite numérica (ALN) a problemas geotécnicos. Os meios (solo ou rocha) são considerados como contínuos convencionais e como contínuos de Cosserat. Da aplicação da formulação mista da análise limite e da discretização do meio por uma malha de elementos finitos é obtido um problema de programação matemática (PM). A aplicação desta metodologia nos contínuos de Cosserat (2D) fornece problemas de programação linear (PL) e nos contínuos convencionais (2D e 3D), problemas de prog

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Javakhishvili, Zurab. "The coupled finite-boundary element method applied to the analysis of geotechnical engineering problems." Thesis, London South Bank University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261020.

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22

Ghasemi, Pooyan. "Application of inverse analysis to geotechnical problems, from soil behaviour to large deformation modelling." Doctoral thesis, Universita degli studi di Salerno, 2019. http://elea.unisa.it:8080/xmlui/handle/10556/4278.

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2017 - 2018<br>Large deformation analysis has become recently centre of attraction in geotechnical design. It is used to predict geotechnical boundary value problems such as, excessive movement of soil masses like landslides or soil-structure interaction like pile installations. Wrong understanding and simulation of each mentioned problem could lead to significant costs and damages, therefore, robust approaches of modelling are needed. Throughout the past decades many numerical methods aiming to simulate large deformations have been introduced as for example, Discrete Element Method (D

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Poli, Arianna <1990&gt. "Dynamic analyses of geotechnical problems using advanced constitutive formulations: soil parameter calibration and numerical implementation." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/8977/1/Poli_Arianna_tesi.pdf.

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The doctoral research has focused on an accurate study of granular soil behaviour in static and seismic conditions, with special reference to seismic-induced phenomena such as liquefaction and lateral spreading whose evidences have been observed during the 2012 Emilia earthquake. The basic aim of the study has been to develop an innovative numerical tool for reproducing the mechanical response of silty-sand soils under different loading and drainage conditions adopting an advanced constitutive model, which could be calibrated from tests that are routinely performed in geotechnical laboratory.

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GUTIERREZ, LUCAS LUDEÑA. "FORMULATION AND SOME APPLICATIONS OF MATERIAL POINT METHOD IN GEOTECHNICAL PROBLEMS IN STATIC AND DYNAMIC CONDITIONS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33844@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>Em problemas geotécnicos podem ocorrer grandes deformações devido a chuvas prolongadas, sismos, deslizamentos de encostas, etc. Material point method (MPM) é um método de solução baseado no Método dos Elementos Finitos (MEF) que oferece vantagens para o cálculo estático e dinâmico que envolve deformações desse tipo. O objetivo desta dissertação é utilizar o MPM em problemas geotécnicos em condições estáticas e dinâmicas. Esta pesquisa mostra

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Blight, Geoffrey Eustace. "Research on construction materials of the Witwatersrand region." Thesis, 1985. https://hdl.handle.net/10539/31330.

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A thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in Science to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, 1985<br>This volume contains a record of research carried out over the past two decades into problems associated with civil engineering and mining construction materials. Although the various parts of the work were initiated as a result of problems that arose in the Witwatersrand region, the results of the research have in many cases evoked intense interest from other parts of the

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"Analysis of geotechnical problems with neural networks." Tese, MAXWELL, 2000. http://www.maxwell.lambda.ele.puc-rio.br/cgi-bin/db2www/PRG_0991.D2W/SHOW?Cont=2001:pt&Mat=&Sys=&Nr=&Fun=&CdLinPrg=pt.

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27

Khuntia, Sunil. "Modelling of geotechnical problems using soft computing." Thesis, 2014. http://ethesis.nitrkl.ac.in/6313/1/E-59.pdf.

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Correlations are very significant from the earliest days; in some cases, it is essential as it is difficult to measure the amount directly, and in other cases it is desirable to ascertain the results with other tests through correlations. Soft computing techniques are now being used as alternate statistical tool, and new techniques such as artificial neural networks (ANN), support vector machine (SVM), multivariate adaptive regression splines (MARS) has been employed for developing the predictive models to estimate the needed parameters. In this report, four geotechnical problems like compacti

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Hung, Yin-Chun, and 洪瑛鈞. "Application and Problems Analysis of ERT for Geotechnical Investigation." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/46223512981088323915.

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博士<br>國立交通大學<br>土木工程系所<br>101<br>Direct current (DC) electrical resistivity method has been developed for almost a century. It has evolved from the 1D, 2D, to more recently the true 3D method. However, field conditions often obstruct 3D surveys and 2D electrical resistivity tomography (ERT) remains to be the state of the practice in geotechnical investigation due to its simplicity in field works and less space requirement. The 2D ERT has been widely applied, but the uncertainty behind the obtained vivid resistivity image is not clear. Its accuracy, spatial resolution, and possible pitfalls sho

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Ali, Abid. "Application of stochastic limit analysis to geotechnical stability problems." Thesis, 2017. http://hdl.handle.net/1959.13/1342973.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Soil is a highly heterogeneous natural material with properties varying from point to point, in contrast to engineered materials like steel and concrete. The variability or uncertainty that exists in characterising the soil properties is usually taken into account by a generous factor of safety in engineering design. Concern has been expressed over the implicit use of a factor of safety alone, due to its inability to explicitly account for soil variability. Therefore, probabilistic methods are required, which can deal with this uncertainty in

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Sabetamal, Hassan. "Finite element algorithms for dynamic analysis of geotechnical problems." Thesis, 2015. http://hdl.handle.net/1959.13/1059862.

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Research Doctorate - Doctor of Philosophy (PhD)<br>The objective of this study is to document the development of a computational procedure for the analysis of coupled geotechnical problems involving finite deformation, inertia effects and changing boundary conditions. The procedure involves new finite element (FE) algorithms that were formulated and implemented into SNAC—a FE code developed by the geomechanics group at the University of Newcastle, Australia. The numerical scheme was then utilised to analyse some important offshore geotechnical problems. The first development concerns the imple

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Anand, Ankit. "Application of Multi-Objective Optimization Techniques to Geotechnical Engineering Problems." Thesis, 2015. http://ethesis.nitrkl.ac.in/7445/1/123.pdf.

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This research work has its motivation in the ever-increasing use of computational methods in the areas of Civil Engineering. Parameter estimation has assumed a critical importance in predicting failure curves more accurately. Error-in-variables approach gives us a chance to predict simultaneously dependent and independent variables. A method like least square can take into account the error in only ‘x’ values and does not consider the error in values of ‘y’. The vector of unknown parameters (𝜎𝑐 , 𝜎𝑡 , ∅) can also be estimated by the EIV approach along with the variable data points. The failure

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Krige, D. G. "A statistical approach to some mine valuation and allied problems on the Witwatersrand." Thesis, 2015. http://hdl.handle.net/10539/17975.

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Raji, M. "Endochronic Constitutive Model for Sands and Its Application to Geotechnical Problems." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3467.

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The introductions of large digital computers in the field of engineering have rendered possible the solution of a wide variety of problems without the need to violate the equilibrium and compatibility. The major requirement for such analysis is a good constitutive model that represents the stress strain behaviour of the materials in an accurate way. Nowadays for most of the geotechnical engineering applications the elastoplastic models like Mohr Coulomb model are widely used. All the existing constitutive models which represent the plastic behaviour of soil are developed from the fundamentals

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Raji, M. "Endochronic Constitutive Model for Sands and Its Application to Geotechnical Problems." Thesis, 2013. http://etd.iisc.ernet.in/2005/3467.

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The introductions of large digital computers in the field of engineering have rendered possible the solution of a wide variety of problems without the need to violate the equilibrium and compatibility. The major requirement for such analysis is a good constitutive model that represents the stress strain behaviour of the materials in an accurate way. Nowadays for most of the geotechnical engineering applications the elastoplastic models like Mohr Coulomb model are widely used. All the existing constitutive models which represent the plastic behaviour of soil are developed from the fundamentals

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Ansari, Yousef. "Applications of large deformation finite element method to geotechnical problems with contact." Thesis, 2014. http://hdl.handle.net/1959.13/1042247.

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Research Doctorate - PhD (Doctor of Philosophy)<br>Geotechnical problems can be very complex because they involve sophisticated issues such as material nonlinearity, large deformations, changing boundary conditions and time-dependent behaviour. The nonlinear finite element method allows a rigorous solution to such complex problems, where analytical solutions cannot be easily obtained. Although much research has been conducted over the last five decades to improve solution algorithms within the nonlinear finite element method, application of these advances to real geotechnical problems has a sh

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"Applications of limit analysis to geotechnical problems modelled as conventional and cosserat continua." Tese, MAXWELL, 2000. http://www.maxwell.lambda.ele.puc-rio.br/cgi-bin/db2www/PRG_0991.D2W/SHOW?Cont=2000:pt&Mat=&Sys=&Nr=&Fun=&CdLinPrg=pt.

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Santoso, Lucia Dewi, and 蘇麗欣. "Probabilistic Machine Learning Model: Extended Monte Carlo Simulation for Solving Geotechnical Engineering Problems." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/surchs.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>106<br>Probabilistic Machine Learning Model: Extended Monte Carlo Simulation for Solving Geotechnical Engineering Problems Thesis Advisor: Jui-Sheng Chou Graduate Student: Lucia Dewi Santoso ABSTRACT Machine learning (ML) is a data mining technique that integrates the principles of statistics, pattern recognition in machine learning, and data base systems. However, prediction, a powerful function of ML, mostly uses deterministic inputs to develop a deterministic prediction model; this model definitely cannot deal with uncertainty of the deterministic output result.

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Hadidi, Rambod. "Generic probabilistic inversion technique for geotechnical and transportation engineering applications." 2007. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.13464.

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Moavenian, Mohammad Hesam. "Mesh optimisation methods for large deformation analysis of geomechanics problems." Thesis, 2017. http://hdl.handle.net/1959.13/1333777.

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Research Doctorate - Doctor of Philosophy (PhD)<br>The Finite Element Method (FEM) is an analytical tool used extensively in nonlinear geotechnical problems. Problems with complex boundary conditions and constitutive soil models can be analysed by the FEM with reasonably accurate results. The geometry of a problem remains unchanged when deformations are small. Therefore, the initial finite element mesh can be used throughout the analysis. On the other hand, in problems involving large deformations, the geometry of the problem changes in such a way that the initial mesh will no longer be usable

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Wang, Kun. "From multiscale modeling to metamodeling of geomechanics problems." Thesis, 2019. https://doi.org/10.7916/d8-v19n-d734.

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In numerical simulations of geomechanics problems, a grand challenge consists of overcoming the difficulties in making accurate and robust predictions by revealing the true mechanisms in particle interactions, fluid flow inside pore spaces, and hydromechanical coupling effect between the solid and fluid constituents, from microscale to mesoscale, and to macroscale. While simulation tools incorporating subscale physics can provide detailed insights and accurate material properties to macroscale simulations via computational homogenizations, these numerical simulations are often too computationa

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Chakraborty, Manash. "Finite Element Limit Analysis for Solving Different Axisymmetric Stability Problems in Geomechanics : Formulations and Solutions." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/2762.

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Limit analysis is a very powerful tool to find accurate solutions of several geotechnical stability problems. This analysis is based on the theory of the plasticity and it provides two limiting solutions within lower and upper bounds. With the advancement of the finite elements and different robust optimization techniques, the numerical limit analysis approach in association with finite elements is becoming quite popular to assess the stability of various complicated structures. The present thesis deals with the formulations and the implementation of the finite element limit analysis to obtain

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Chakraborty, Manash. "Finite Element Limit Analysis for Solving Different Axisymmetric Stability Problems in Geomechanics : Formulations and Solutions." Thesis, 2015. http://etd.iisc.ernet.in/handle/2005/2762.

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Limit analysis is a very powerful tool to find accurate solutions of several geotechnical stability problems. This analysis is based on the theory of the plasticity and it provides two limiting solutions within lower and upper bounds. With the advancement of the finite elements and different robust optimization techniques, the numerical limit analysis approach in association with finite elements is becoming quite popular to assess the stability of various complicated structures. The present thesis deals with the formulations and the implementation of the finite element limit analysis to obtain

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Sahoo, Jagdish Prasad. "Upper Bound Finite Element Limit Analysis for Problems of Reinforced Earth, Unsupported Tunnels and a Group of Anchors." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/2811.

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This thesis presents the implementation of the upper bound limit analysis in combination with finite elements and linear optimization for solving different stability problems in geomechanics under plane strain conditions. Although the nonlinear optimization techniques are becoming quite popular, the linear optimization has been adopted due to its simplicity in implementation and ease in attaining the convergence while performing the analysis. The objectives of the present research work are (i) to reduce the computational effort while using an upper bound finite element limit analysis with line

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Sahoo, Jagdish Prasad. "Upper Bound Finite Element Limit Analysis for Problems of Reinforced Earth, Unsupported Tunnels and a Group of Anchors." Thesis, 2013. http://etd.iisc.ernet.in/handle/2005/2811.

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This thesis presents the implementation of the upper bound limit analysis in combination with finite elements and linear optimization for solving different stability problems in geomechanics under plane strain conditions. Although the nonlinear optimization techniques are becoming quite popular, the linear optimization has been adopted due to its simplicity in implementation and ease in attaining the convergence while performing the analysis. The objectives of the present research work are (i) to reduce the computational effort while using an upper bound finite element limit analysis with line

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