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Showing 1 to 20 of 33 for “"Soil stiffness"”.
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The Role of Soil Stiffness in Reverse Fault Rupture Propagation
… flow was employed to study the plastic soil properties which affect the rate of surface fault rupture propagation in reverse events. These numerical simulations show a trend for soils with higher stiffness to have a higher rate of rupture propagation. Additionally the study shows the …
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The Behavior of Pore Water Pressure in Cohesive Subgrade Soils
… of pore water pressure in subgrade cohesive soils under Falling Weight Deflectometer (FWD) tests. The deflection of a pavement structure largely depends on the deformation of subgrade soils, which is in turn dependent upon soil stiffness. Soil stiffness can be characterized by the resilient …
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Design verification of a diaphragm wall with steel piles
… design was based on analysis performed on a soil-structure interaction program using soil parameters calibrated in a previous study. Original and "as-built" design models were compared to measured results of the constructed structure. A second study was conducted to identify the sensitivity …
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Three-Dimensional Analysis of Geosynthetic Reinforcement Used in Column-Supported Embankments
… and thickness), the vertical load, the soil stiffness above the piles, the soil stiffness between the piles, the size of the piles, and the distance between the piles.
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Numerical modelling of onshore wind turbine gravity foundations susceptible to cyclic soil degradation
… conditions comprised of softer or plastic soil layers, where the effects of cyclic degradation need to be taken into consideration during the design stage. Cyclic degradation refers to the phenomenon in which the stiffness of soil decreases progressively when subjected to cyclic loading. …
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Dynamic Analysis Of Turbine-generator-foundation Systems
… deck, piers, foundation mat, piles, and soil medium, have been included. Full interaction between the turbine-generator set, the foundation superstructure, and the soil medium, is considered.;A hybrid method is proposed to establish the mathematical model for the …
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Analysis of shallow and deep foundations using soil-structure interaction techniques
… readily incorporated into the model enabling the soil-structure interaction of the complete system to be investigated.<br/><br/>The supporting soil is modelled using a discrete spring representation as in the simplified subgrade reaction theory (S.S.R.T.). The idealized model is analysed using a …
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Experimental and theoretical investigation of constant rate of strain consolidation
… and rate of consolidation) of a cohesive soil and possess many advantages over the incremental oedometer test. Ease of operation and the ability to take frequent readings provides tremendous labor savings and a better definition of the compression curve. However, the test has some …
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Investigations of threshold effects in soil deformations
… structures. Some of the factors which affect soil stiffness are reviewed. The major factors affecting soil stiffness are identified as the stress history of samples, the current stress state and the current stress path. The effect of sample disturbance is to reduce measured stiffnesses, …
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Optimization of Bridge Approach Slab
… the effect of span, reinforcement changes, and soil stiffness under the slab. This project study provides an overview of optimization of design and cost of Bridge Approach Slab.
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Fracture-Based Method to Determine the Flexural Load Capacity of Concrete Slabs
… (f't) measured from split tensile cylinders. The soil underneath the slab was characterized as a linear elastic spring elements with their stiffness obtained from a beam on soil test. The simulations from the 3-D slab models reasonably matched experimental tests of notched concrete slabs …
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Creep behaviour of shallow foundations on sand and its implication to soil–structure interaction
… on sand using the discrete element method (soil element scale), followed by the formulation and validation of the footing modelling method (footing scale), and the application of the proposed method in soil–structure analysis (structure system scale). At the soil element scale, the creep and …
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An introduction to geotechnical design of South African wind turbine gravity foundations
… footings for these structures, specific to SA soil conditions and policies. To understand the implications of the main aim of the study, the current scope for renewable energy project uptake in South Africa was summarized, highlighting the scope and growth potential legislated by the Renewable …
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Axial load transfer in large scale physical model drilled shaft foundations
… cycles. A better understanding of the changes in soil reload stiffness can lead to a better understanding of the load deformation response. A study was undertaken using a 16-inch diameter by 28-inch tall physical model drilled shaft foundation. A total of nine static load tests were performed in a …
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The influence of effective consolidation stress on the normalized extension strength properties of resedimented Boston blue clay
… the undrained shear strength of cohesive soil is of particular importance to the practice of geotechnical engineering. Ladd & Foot (1974) presents a method to determine the undrained shear strength based on the concept of normalized soil parameters; called the SHANSEP (Stress History and …
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A THREE-DIMENSIONAL FULLY COUPLED HYDRO-MECHANICAL ELASTO-PLASTIC MODEL FOR UNSATURATED SOILS WITH CONSIDERATION OF HYSTERESIS BEHAVIOR
<p>"Unsaturated soils are often used as a construction material in transportation infrastructures; in which it is subjected to cyclic traffic loadings and/or seasonal wetting-drying cycles. While mechanical hysteresis is a common feature of soils in general, hydraulic hysteresis is associated with …
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Early Age Assessment of Cement Treated Materials
… this research was to evaluate the utility of the soil stiffness gauge (SSG), heavy Clegg impact soil tester (CIST), portable falling-weight deflectometer (PFWD), dynamic cone penetrometer, and falling-weight deflectometer for assessing early-age strength gain of cement-stabilized materials. …
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Stiffness characterization of mechanically-compressed cohesive soils using wave propagation
Wave propagation through soils is a non-destructive method used to characterize soil stiffness properties and is the basis for geophysical interpretations. Due to the difficulty of measuring shear waves through soft cohesive soils with ultrasonic transducers, bender elements are typically used, …
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Assessment of the Cyclic Strain Approach for the Evaluation of Initial Liquefaction
… procedure is it ignoring the softening of the soil stiffness due to excess pore pressure in representing the earthquake loading in terms of γc and neqγ.
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