An investigation related to flexible landing mats of granular soils
An investigation related to flexible landing mats of granular soils
This thesis is concerned with the behaviour of rigid plates and flexible mats on granular soils subjected to static and cyclic loading. Prototype mats are formed from corrugated planks joined at their edges, which result in low transverse bending stiffness. It was therefore assumed that such a mat could be modelled by a system of separate flexible beams, laid side-by-side on the soil surface. A study of a series of singly and cyclically loaded tests on rigid plates of different shapes and sizes, is reported as well as scaled model flexible mats using different thicknesses and breadths of beams. Based on dimensional arguments, it is demonstrated that unique relationships can be otained between dimensionless parameters representing the response of such soil structure systems. The relationships obtained can then be used to predict the response of prototype foundations. The procedures developed proved to be successful in describing the load-displacement behaviour of mats and plates under loads of up to seventy per-cent of their maximum vertical load capacity. A numerical analysis has been developed in which the parameters obtained from rigid plate tests are used to analyse the response of scaled model mats under static loading. In parellel with the above work, a computer-based study of the mechanical behaviour of discrete two-dimensional particle assemblies has also been carried out. The discrete particle model has been used to generate gravitationally deposited beds up to 11,000 graded particles. A simulated plate loading test has been performed using this model and initial results are reported. Finally, a series of drained triaxial tests carried out on sand samples, 1.2m diameter 1.5m height, are reported in Apendix D. These tests were intended to investigate features of initial small-strain response which are relevant to the plate and mat tests. (D71307/87)
University of Southampton
1986
Mirzabaigi, Hakop
(1986)
An investigation related to flexible landing mats of granular soils.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
This thesis is concerned with the behaviour of rigid plates and flexible mats on granular soils subjected to static and cyclic loading. Prototype mats are formed from corrugated planks joined at their edges, which result in low transverse bending stiffness. It was therefore assumed that such a mat could be modelled by a system of separate flexible beams, laid side-by-side on the soil surface. A study of a series of singly and cyclically loaded tests on rigid plates of different shapes and sizes, is reported as well as scaled model flexible mats using different thicknesses and breadths of beams. Based on dimensional arguments, it is demonstrated that unique relationships can be otained between dimensionless parameters representing the response of such soil structure systems. The relationships obtained can then be used to predict the response of prototype foundations. The procedures developed proved to be successful in describing the load-displacement behaviour of mats and plates under loads of up to seventy per-cent of their maximum vertical load capacity. A numerical analysis has been developed in which the parameters obtained from rigid plate tests are used to analyse the response of scaled model mats under static loading. In parellel with the above work, a computer-based study of the mechanical behaviour of discrete two-dimensional particle assemblies has also been carried out. The discrete particle model has been used to generate gravitationally deposited beds up to 11,000 graded particles. A simulated plate loading test has been performed using this model and initial results are reported. Finally, a series of drained triaxial tests carried out on sand samples, 1.2m diameter 1.5m height, are reported in Apendix D. These tests were intended to investigate features of initial small-strain response which are relevant to the plate and mat tests. (D71307/87)
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Published date: 1986
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Local EPrints ID: 461963
URI: http://eprints.soton.ac.uk/id/eprint/461963
PURE UUID: 7de69a09-3f3a-4bea-9987-2c1b82fd78c6
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Date deposited: 04 Jul 2022 18:59
Last modified: 04 Jul 2022 18:59
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Author:
Hakop Mirzabaigi
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