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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 51 for “"soil behavior"”.
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Selectivity and soil behavior of chlorsulfuron
… safener NA (1,8-naphthalic anhydride). The soil behavior of chlorsulfuron was studied in the field, greenhouse and laboratory. In the field, corn adequately tolerated soil residues present 10 months following postemergence application of chlorsulfuron at 10 to 120 g/ha. However, at the same …
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Modeling and Finite Element Analysis of Soil Behavior
Made available in DSpace on 2014-12-13T19:31:58Z (GMT). No. of bitstreams: 1 8009068.pdf: 9506812 bytes, checksum: d8b51e53902121f664a2c5a4f92ed32f (MD5) Previous issue date: 1979
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Finite element analyses on cohesive soil behavior due to advanced shield tunneling
Soil tunnels are usually constructed using a shield with an open face. However, in the past decade, innovations in shield tunneling technology have brought closed-faced shields that provide continuous support to the face and permit tunneling through even the most difficult conditions of soft …
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Interpretation of Soil Behavior From Laboratory Specimens Subjected to Non-Uniform Loading Conditions
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Microsoft Office.
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Seismic Site Response and Extraction of Dynamic Soil Behavior From Downhole Array Measurements
… computed ground motions, and include randomized soil column properties representing the Mississippi Embayment to evaluate depth dependent site coefficients. Probabilistic seismic hazard maps considering effects of thick soil deposit for Mississippi Embayment are proposed.
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The interplay between field measurements and soil behavior for learning supported excavation response
Made available in DSpace on 2010-05-14T20:51:44Z (GMT). No. of bitstreams: 3 Osouli-Abdolreza.pdf: 7957856 bytes, checksum: 3b4772257425d579b96f4887994f61dd (MD5) Osouli_Abdolreza.pdf: 7957856 bytes, checksum: 3b4772257425d579b96f4887994f61dd (MD5) license.txt: 4066 bytes, checksum: …
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Integrated computational-experimental soil behavior characterization from direct simple shear tests on Boston Blue Clay
A constitutive model that represents soil behavior under a wide range of loading conditions is necessary for the simulation of complex boundary value problems. However, most laboratory tests are interpreted with an assumption of uniform stresses and strains within the tested soil specimen even when …
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Seismic site response analysis and extraction of dynamic soil behavior and pore pressure response from downhole array measurements
… used to predict ground response due to local soil effects. Advancements in the knowledge of shear-induced excess pore pressure generation has led to the development and implementation of pore pressure response models for site response analysis with effective stress consideration. This thesis …
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Visualization in Geomechanics With an Application to Deep Excavations
The second part of this dissertation explores the behavior of deep excavation numerical analyses, with the aid of the visualization techniques presented herein. First, a 2D plane strain excavation analysis is explored. Second, a 3D linear excavation is modeled using a variety of excavation …
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Integration of Numerical Modeling and Field Observations of Deep Excavations
… the application of SelfSim to extract the soil constitutive behavior directly from field measurements of two excavation case histories. SelfSim is able to extract sufficient information on soil behavior to capture measured excavation response in multilayer soil profiles. The analyses …
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Multi-Scale Thermo-Hydro-Mechanical Behavior of Saturated Earth Materials
… applications, such as geothermal piles, subject soils to temperature changes. Recorded temperature variations around thermo-active infrastructure and within the active layer of the permafrost reveal the cyclic and transient nature of these temperature changes. Previous studies on the …
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Resposta dinâmica não-linear da interação solo-estrutura no domínio da frequência
… the system DINAF/NL which allows the nonlinear soil-structure interaction dynamic analysis of bi-dimensional models with applied external loadings using the finite element method. The solution of the dynamic equilibrium equations is done in the frequency domain, through the direct solution of a …
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In-Situ Geotechnical Characterization of Soft Estuarine Surficial Sediments Using a Portable Free Fall Penetrometer
Knowledge of geotechnical soil properties in the upper meter of the seabed is important for challenges such as scour around submerged structures, management of unexploded ordnances, and generally issues associated with active sediment transport and deposition. Portable free fall penetrometers have …
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Temporal playscape design within an existing landscape dynamic
… regularly to the site. Considerations of natural soil behavior, water drainage patterns, soil erosion, and plant invasion are instrumented into the final articulation of the playscape.
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Controlling role of suction stress in the Atterberg limits
Soil plasticity and consistency are indicators of a soil’s strength and deformation as a function of water content. They are often treated as secondary concepts in geotechnical analysis, likely due to the arbitrary and empirical nature of their definitions—such as those associated with plastic and …
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Stress-density relationships for an agricultural soil
… effect of a tractor wheel loading on the soil. A volume measuring technique was developed to be used in triaxial tests conducted under high loading rates. A sandy clay agricultural soil was tested under predetermined conditions using an INSTRON loading frame, a differential pressure …
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Analysis of large deformation offshore geotechnical problems in soft clay
… 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 …
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Ground improvement using vacuum preloading together with prefabricated vertical drains
… vacuum pressure, which is applied to the soft soil through the vertical drains, results in an isotropic increase in effective stress within the soil mass, and therefore, can be applied with full intensity in a single stage. On the other hand an equivalent fill preload is applied in stages to …
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Determination of evaporative flux from water and soil surfaces
… determine evaporative flux from water and soil surfaces. The main research contributions of this research are summarized as follows: (i) a Bench-scale Atmospheric Simulator (BAS/BAS2) was developed to control artificially generated parameters for short time periods; (ii) a Controlled …
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Seismic performance of single-propped retaining walls
… the base of the model. The non-linear, inelastic soil behavior was represented by the advanced PB constitutive model (generalized effective stress soil model) developed by Papadimitriou et al. (2002). In order to avoid spurious reflections of shear waves on the vertical boundaries of the finite …
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