Global ETD Search
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Showing 1 to 20 of 20 for “"Soil Response"”.
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Constitutive modelling of the behaviour of clays under cyclic loading
… must be based on an understanding of the soil response and the critical state theory provides a description of the soil response which then be formulated in terms of plasticity theory. A literature review showed that there is a shortage of information on the behaviour of soils under cyclic …
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Empirical nonlinear site response applicable to Greater Vancouver, British Columbia
… not been recorded to quantify expected nonlinear soil response. Earthquake horizontal to vertical spectral ratios (eHVSR) are evaluated at seismic stations located at the edges or deeper center of sedimentary basins in Mexico City, the Kanto basin and Anchorage with available weak-to-strong motion …
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Cover crop residue effects on machine-induced soil compaction
… ) to suppress weed growth and conserve soil moisture have been developed at Virginia Tech. The success of alternative, reduced-input crop production systems has encouraged research into the potential for breaking the traffic-tillage cycle associated with conventional tillage crop …
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Experimental and numerical investigations to assess the behaviour of a buried pipeline in areas with high geological instability
… such as landslides, fault movements, soil liquefaction which may be caused by seismic activity are one of the most dangerous phenomena that can involve buried pipelines, e.g. for oil and gas transportation, or water and sewage. This aspect is currently an important part of research and …
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The Effects of Vibration on the Penetration Resistance and Pore Water Pressure in Sands
… for using cone penetration test data to estimate soil behavior during seismic loading involves the comparison of the seismic stresses imparted into a soil mass during an earthquake to the penetration resistance measured during an in-situ test. The approach involves an indirect empirical …
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One-dimensional site response analyses in potentially liquefiable soil profiles
The seismic performance of soil profiles with potentially liquefiable deposits is a complex phenomenon that requires a thorough understanding of the soil properties and ground motion characteristics. The limitations of simplified liquefaction assessment methods have prompted an increase in the use …
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Coupled thermo-hydro-mechanical behavior of glacial tills in shallow geothermal systems
… the ground is used as a thermal reservoir and soils are subjected to thermal gradients, such as shallow geothermal systems, motivated this study. The soil response under representative field conditions upon heating can affect the performance and overall operation of shallow applications, …
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The effects of multi-directional loading on soil liquefaction
… the influence of multi-directional shearing on soil behaviour, especially the undrained behaviour of saturated sands, remains one of the least understood areas in geotechnics. This study developed a new test database on Hostun sand with the modified multi-directional simple shear testing …
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Experiments in tunnel-soil-structure interaction
… Predicting the interaction between a tunnel, the soil and existing structures remains an engineering challenge due to the highly non-linear behaviour of both the soil and the building. This thesis investigates the interaction between a surface structure and tunnelling-induced ground displacements. …
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Soil-Structure Interaction for low damage Seismic Rocking Systems
… structures. However, understanding the role of soil–structure interaction in the response of rocking systems remains a challenge. The goal of this thesis is to offer new knowledge on this field by assessing experimentally and computationally the response of rocking structures and the soil they …
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Pedogenesis, weathering processes, and elemental distribution along a soil climosequence in the southern Piedmont
… and geomorphic age on weathering intensity, soil profile development, mineral stability, and elemental flux within the pedoenvironment. Upland soils formed in similar granitic parent materials along a climatic gradient in the nonglaciated Southern Piedmont Province were analyzed in order to …
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Oligohaline wetland response and recovery following storm-driven saltwater intrusion in coastal Louisiana
… changes to coastal wetland plant communities and soils by changing the environmental conditions in which they exist. Here I examined the impacts of storm-induced saltwater intrusion and post-intrusion conditions on the structure and growth of an oligohaline wetland plant community, and on wetland …
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The Impact of Rolling Dynamic Compaction
… of improvement that are possible in varying soil conditions. Current practice dictates that practitioners rely on personal experiences or available published project case studies that are limited in scope and applicability as they are typically aimed at achieving a project specification. …
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Systematic Tire Testing and Model Parameterization for Tire Traction on Soft Soil
Tire performance over soft soil influences the performance of off-road vehicles on soft soil, as the tire is the only force transmitting element between the off-road vehicles and soil during the vehicle operation. One aspect of the tire performance over soft soil is the tire tractive performance on …
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Advanced Interaction Analysis for Foundation Design and Coastal Cliff Stability
… challenges arising from the combined effects of soil behaviour, wave loading, and progressive cliff erosion. The stability of these areas is critical for the safety and sustainability of coastal infrastructure. Current approaches often fail to fully integrate the coupled effects of hydrodynamic …
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Computer program development for the analysis of inelastic beam and soil behaviour in geotechnical design
… problems based on the principles of beam-soil interaction where the beam is supported by a single or two-layer soil system. In 1867, a foundation model was proposed by Winkler in which the elastic foundation beneath a horizontal beam could be viewed as a series of independent springs. …
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Seismic Response of Structures on Shallow Foundations over Soft Clay Reinforced by Soil-Cement Grids
… analyses to: (1) evaluate the effect of soil-cement grid reinforcement on the seismic response of a deep soft soil profile, and (2) to examine the dynamic response of structures supported by shallow foundations on soft clay reinforced by soil-cement grids. The soil profile consisted of a …
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Influencia de la combinación de tensiones tangenciales estáticas y cíclicas en la evaluación de parámetros dinámicos de un suelo cohesivo
… related to the dynamic behavior of soils have been performed without applying different configurations of monotonic shear stress previously to the dynamic solicitation. Therefore the main objective of this research was to establish the influence of preexisting stress state on the …
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Evaluating soil pressures on a deep foundation element due to liquefaction-induced lateral spreading
… during earthquakes includes the inertial response of the foundation and superstructure 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 …
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Nonlinear site amplification functions for Central and Eastern North America
… of site amplification. This research uses site response simulations to develop site amplification functions for CENA. The first part of this study is the development of 1,747,278 1-D linear elastic, equivalent linear, and nonlinear site response analyses. Simulations are designed to capture the …