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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 30 for “"lateral spreading"”.
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Lateral Spreading Mechanics of Column-Supported Embankments
… beneficial effects of reducing settlement and lateral displacement, and improving stability. Selection of column type depends on the design load, cost, constructability, etc., although unreinforced concrete columns are commonly used. A load transfer platform (LTP) is often included at the …
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Analysis of a Lateral Spreading Case History from the 2007 Pisco, Peru Earthquake
… which triggered multiple liquefaction induced lateral spreads. The subduction earthquake lasted for approximately 100 seconds and showed a complex rupture. From the geotechnical perspective, the Pisco earthquake was significant for the amount of soil liquefaction observed. A massive …
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Evaluating soil pressures on a deep foundation element due to liquefaction-induced lateral spreading
… system, and the kinematic forces induced by the lateral spreading ground. Both must be analyzed in practice to design a bridge foundation, or other foundation type, subject to seismic forces and potential lateral spreading-induced pressures. The kinematic loadings on a large, rigid caisson due to …
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EPOLLS: An Empirical Method for Prediciting Surface Displacements Due to Liquefaction-Induced Lateral Spreading in Earthquakes
In historical, large-magnitude earthquakes, lateral spreading has been a very damaging type of ground failure. When a subsurface soil deposit liquefies, intact blocks of surficial soil can move downslope, or toward a vertical free face, even when the ground surface is nearly level. A lateral spread …
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Dynamic soil modeling in site response and soil-large pile interaction analysis
… in soil deposits and 2) the effects of lateral spreading on large pile foundations. Two new soil damping formulations are implemented in non-linear one-dimensional site response analysis for small and large strains. The first formulation introduces an approach to construct a …
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Dynamic Pile-Soil Interaction in Laterally Spreading Slopes
… Pisco earthquake in Peru). Liquefaction-induced lateral spreading is known to be one cause of severe damage to deep foundation systems. However, the dynamic soil-structure interaction between liquefied soil and piles is extremely complex and further work is required to define the appropriate …
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The Effects of Basin Slope and Boundary Friction on the Character and Plunge Location of Hyperpycnal Flows Entering a Laterally Unbounded Basin
… assumption in these studies is that the flow is laterally confined. These studies allow the flow to plunge only in two directions, the horizontal x-direction and the vertical z-direction. The goal of this study is to determine if there is observable plunging of hyperpycnal flows in the lateral …
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Seismic response of wharf structures supported in liquefiable soil
… cause of the structural damage is indeed the lateral spreading of the soil and therefore retrofitting efforts should be targeted in limiting the development of pore pressures that cause the lateral spreading. This argument is then tested by comparing the performance in numerical simulations …
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Numerical modeling of a bridge system & its application for performance-based earthquake engineering
… to pile and abutment foundation failure due to lateral spreading. In most of these cases, soil pile-structure interaction (SPSI) has played an important role. SPSI is affected by soil conditions (e.g., competent soil or liquefiable soil) and loading conditions (e.g., earthquake intensity, motion …
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Investigation of Injectant Molecular Weight and Shock Impingement Effects on Transverse Injection Mixing in Supersonic Flow
… penetration in general, as well as increase the lateral spreading of the plume. The majority of the data shows a weak dependency of the jet size on molecular weight, but there are indications that under certain circumstances large changes in the flow structure may occur due to molecular weight …
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Finite element analysis of embankment on soft Indian River clay
… embankment settled up to 6.5 feet, while large lateral spreading in the clay was restrained by overlying sand layers. The side walls tilted by up to 1.1°. The measured ground movement far exceeded the expectations of the designers and the embankment was eventually dismantled in 2008. The current …
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Effect of hole configurations on film cooling from cylindrical inclined holes for the application to gas turbine blades
… 50%. However, they do not provide significant lateral spreading as seen for trenched holes. Meanwhile, film cooling predictions are used to understand the mechanisms of the jets that exit these trenched holes and crater holes. The present work employs RSM (Reynolds stress transport model) for …
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Enhancing Ballast Performance Using Geocell Confinement
… while reducing vertical settlement and lateral spreading. Additionally, the parametric study shows that the use of geocell provides a composite, "mattressing" effect that distributes subgrade stress more uniformly than without reinforcement, increasing bearing capacity and reducing …
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The effect of flow structure on the combustion and heat transfer in a scramjet combustor
… that the injectors were effective in promoting lateral spreading of the fuel jets. The incomplete penetration of the fuel jets in the direction normal to the walls was a major limiting factor in the amount of mixing that could occur for both configurations. In addition, the proximity of the …
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Centrifuge Modelling Study of Contrasting Structural Styles in the Salt Range and the Potwar Plateau, Pakistan
… to horizontal shortening by collapse and lateral spreading of a “hinterland wedge” which simulates overriding by the Himalayan orogen (above the Main Boundary Thrust). The models of the central SR/PP show that the accretionary wedge develops a prominent culmination structure with …
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Field-based Constraints on the Origin of the Benton Uplift, Ouachita Mountains
… preliminary evidence for non-plane strain lateral spreading of the wedge, i.e. sub-horizontal orogeny-parallel extension, following emplacement onto North American continental crust.</p>
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Effective properties of multiphase flow in heterogeneous porous media
… numerical simulations. Positive dependence of lateral spreading on input fl.ow rate is predicted for Cape Cod Aquifer with reverse response at Borden Aquifer due to capillary pressure dependent anisotropy of Borden Aquifer. The effective permeability for horizontal fl.ow with core scale …
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Ground Improvement for Liquefaction Mitigation at Existing Highway Bridges
… pressure, presence of a supported structure, and lateral spreading forces. Simplified, uncoupled analytical methods were unable to predict the final performance of an improved ground zone and supported structure, but provided useful insights. Pseudostatic stability and deformation analyses can not …
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A study on ground improvement using a combination of stone and concrete columns
… aggregates with a view to limit the bulging/lateral spreading of its aggregates in such soils. In this study, the upper portion of the stone columns was replaced by different grades of unreinforced concrete. The length of the concrete, as well as the depth of the soil beneath the columns, …
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Molecular modeling of polymer crystallization and the effect of nucleating agents
… through the mechanisms of surface nucleation and lateral spreading of the solid phase within layers in the vicinity of the growth front. Transformation within each layer is described by an equation similar to the two-dimensional variant of the Johnson-Mehl-Avrami equation. The kinetic model is …
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