Global ETD Search
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 36 for “"Centrifuge Tests"”.
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Numerical simulation of dynamic centrifuge tests on concrete faced rockfill dam
… via numerical simulations representing prototype centrifuge experiments performed on a CFRD model. The effects of two factors on the computed response are investigated: (1) impact of un/reloading rules (hysteretic behavior), and (2) interface type between concrete face and rockfill (welded and …
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Evaluation of cyclic behavior of dense sands under multidirectional loading using centrifuge tests
… from drained and undrained cyclic element tests are available, they do not all explicitly incorporate multidirectional shaking. Moreover, typical drainage conditions in the field may be partially drained while shaking-induced vertical strains accumulate. This work forms a unique database of …
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An investigation of liquefied shear strength using novel centrifuge tests, direct simple shear tests, and field case histories
… direct simple shear testing; and (3) novel centrifuge modeling. Corresponding results were compared and discussed. Field cases of flow liquefaction provide valuable information for liquefied shear strength because those failures provide realistic estimates of su(liq). An updated database of …
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Seismic Response of Structures on Shallow Foundations over Soft Clay Reinforced by Soil-Cement Grids
This study uses dynamic centrifuge tests and three-dimensional (3D), nonlinear finite-difference 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 …
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Submarine landslide flows simulation through centrifuge modelling
… slopes. This thesis is concerned with developing centrifuge scaling laws for submarine landslide flows through the study of modelling submarine landslide flows in a mini-drum centrifuge. A series of tests are conducted at different gravity fields in order to understand the scaling laws involved in …
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An Investigation into the Seismic Resilience of Shallow Cut-and-Cover Tunnel in Urban Environments
… a comprehensive investigation combining dynamic centrifuge tests conducted at the Schofield Centre of the University of Cambridge, and corresponding 2D finite element (FEM) simulations to evaluate the seismic response of a rectangular cut-and-cover tunnel under varying conditions. The study …
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Screw piles as offshore foundations : Numerical and physical modelling
… offshore application. In addition, 29 successful centrifuge tests were carried out using a newly developed servo-actuator so that the screw pile models could be installed and tested inflight in one operation at 50g acceleration. The centrifuge tests of screw pile models and CPTs were carried out …
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Sand Deformation Mechanisms and Earth Pressures Mobilised with Retaining Wall Movements
… retaining wall movements. The first group of six centrifuge tests was conducted to investigate loose and dense Hostun sand behaviours with a complete set of rigid wall movement modes, i.e. rotation about the base, translation and rotation about the top. Sand deformations and earth pressures were …
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Seismic Behaviour of Retaining Walls with Adjacent Structures
… The primary methodology in this research is centrifuge modelling. Five centrifuge models use a simplified eccentric structure representing a container crane, a cantilever retaining wall, and liquefiable sand. Two models without a structure behind the retaining wall are considered benchmark …
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Centrifuge modelling of the impact of mechanised tunnelling on piled foundations using a miniature TBM
… the advancement of a TBM in a geotechnical centrifuge an attractive proposition. In this research, a miniature EPB TBM was developed for use in the Turner beam centrifuge at the University of Cambridge aiming to simulate the impact of tunnel construction on existing piled foundations. The …
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Evaluating soil pressures on a deep foundation element due to liquefaction-induced lateral spreading
… more rigid, foundation elements. Fourteen centrifuge tests were conducted at the NEES facility at Rensselaer Polytechnic Institute (RPI) to investigate the lateral spreading-induced kinematic pressures on a relatively large deep foundation (caisson) and to observe the related ground …
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Use of thermo-active piling for slope stabilisation
… purposes - were investigated. An extensive centrifuge testing programme was conducted to quantify the overall performance of unsaturated slopes reinforced by thermo-active piles under different thermal loading conditions. Load transferred to the piles, bending moment distribution along the …
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Lateral response of stiff column-supported shallow foundations
… lateral response of such systems. A series of centrifuge tests were carried out to examine the lateral response of stiff column-supported shallow foundations. The experimental trends suggested that the thickness of the coarse-granular mattress placed above the soil-column composite, called the …
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Response of Pile-Supported T-Walls to Fill Loading and Flood Loading Based on Physical Model Studies and Numerical Analyses
… Institute (RPI) performed a series of eight centrifuge tests to investigate and physically model the effects of settlement-induced bending moments on pile-supported T-walls. The centrifuge tests were evaluated and interpreted, and in order to better capture uncertainty, upper and lower bounds …
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An Experimental Study of the Dynamic Behavior of Slickensided Surfaces
… was to investigate, through laboratory strength tests and centrifuge model tests, the shearing resistance that can be mobilized on slickensided rupture surfaces in clay slopes during earthquakes. A method was developed for preparing slickensided rupture surfaces in the laboratory, and a series of …
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A Hybrid Approach for Nonlinear Soil-Structure Interaction Analysis of Pile- Supported Bridges
… The developed model is verified using data from centrifuge tests. In order to compute EL impedance functions from the continuum FE model, an algebraic solution is derived for the system of dynamic equilibrium equations in substructure analysis. In this frequency-domain solution, Fourier transform …
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Long-term basement heave in over-consolidated clay
… In this research, a series of geotechnical centrifuge tests were performed to investigate the heave behaviour of rectangular basements underlain by over-consolidated clay. The construction sequence, basement slab stiffness, and embedment conditions at formation level were varied between …
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Seismic behaviour of structures with basements in liquefiable soil
… A series of highly instrumented dynamic centrifuge tests showed that the presence of a basement can reduce the liquefaction induced settlement of a structure whilst maintaining the natural isolation provided by liquefied soil. The generation of positive excess pore pressures during …
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Dynamic Soil-Structure Interaction In Buildings With Oil Dampers
… the application of high gravity geotechnical centrifuge testing as a viable research tool to experimentally investigate dynamic SSI in buildings with oil dampers. Miniature oil dampers for use in small-scale model structures were developed for this purpose, following a series of …
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