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 75 for “"Factor of Safety"”.
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SEARCHING FOR THE FACTOR OF SAFETY: A STUDY OF WOOD ROOF SYSTEM CAPACITY AS IT APPLIES TO SOLAR PHOTOVOLTAIC INSTALLATION
… recent drive to install residential installation of photovoltaic roof systems has generated the need to re-examine the structural capacity of residential structures. Currently, a perspective exists that residential wood roofs may not be able to carry the additional load of a photovoltaic (PV) …
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Effect of Climate Change on Slope Stability of Variably Saturated Embankments Using Local Factor of Safety and In-Situ Stress Finite Element Analysis
… will change significantly over the course of the century. Consequent changes in moisture content patterns within the earth structures, can destabilize, currently stable natural and engineered slopes and infrastructure embankments. In this research, the effect of climate change on the …
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Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads
The stability analysis of rock slopes has been a challenging task for engineers because the rock mass constituting the slope often has discontinuities in various forms, resulting in different types of slope failures. The plane failure is one of the rock slope failures observed in field situations …
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Movement of Reactivated Landslides
"Because the displacement rate of ""very slow"" and ""extremely slow"" moving reactivated landslides in stiff clays and clay shales, is typically controlled by fluctuations in piezometric levels; the relations between rate of movement and piezometric levels and factor of safety (proportional to …
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Levee Stabilization Design for Flood Control in East Grand Forks, Minnesota
… for a failing levee system using the method of slices. An assumed failure surface was drawn and divided into vertical slices, where the forces acting on each slice were analyzed. If the forces available to resist movement were greater than the forces driving movement, the slope was considered …
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Probability analysis of slope stability
The ability of geotechnical engineers to accurately model slope performance is compromised by a variety of factors. The net result of these considerations is that the exact behavior of slopes cannot be accurately predicted. Hence, geotechnical engineers resort to a factor of safety approach to …
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Movement of landslides in stiff clays and clay shales
The rate of slope movement has major socio-economic implications on the rapid global urbanization, with estimated annual fatalities resulting from landslides near 5000 and economic losses amounting to over $15 Billion U.S. dollars. Yet, the stability of natural and man-made slopes is generally …
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Estudo da estabilidade de valas escoradas por equilíbrio-limite e pelo método dos elementos finitos
This work examines the behavior of strutted excavations by means of different methods. Chapter 2 presents a review of the methods available for the stability analysis of excavations: the methods fall into three main cathegories, namely (a) simple (or "empirical") methods, (b) limit-equilibrium …
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Fluid flow and slope stability model
The objective of this work was to develop a computer model to calculate the changes in factor of safety of a slope with time resulting from changes in the water saturation. A two-phase fluid flow model was incorporated to calculate the saturation and saturation changes in fractured and nonfractured …
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Reliability of Serviceability and Strength of Deep Foundations Embedded in (p-y) Sand Below Water Table Subjected to Lateral Cyclic Loading
… variables (uncertainties) affect the behavior of laterally loaded piles and the pile-soil system and their modeling. In reality when engineers are faced with uncertainties, they use a factor of safety to design the structure or a component, which is a conservative approach. Reliability is a …
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Application of Caquot's solution to the analysis of stability of shallow circular cavities in Tresca material
The primary objective of this study is to expand upon and investigate a stress field solution for the stability of shallow cavities proposed by Caquot in 1934. Despite its relevance, this solution appears to have been overlooked in the literature. In this thesis, Caquot's analytical model is …
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Optimization of Pile Reinforced Slopes Using Finite Element Analyses
<p>Piles have proven to be an effective means of stabilizing active landslides as well as in marginally stable slopes. Many practical empirical design and analysis methods of slope stability and piled-slope stability have been proposed. However, the solutions of analysis and design methods proposed …
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Wedge failure analysis of anchored rock slopes subjected to surcharge and seismic loads
… civil engineering projects is always a problem of great concern. Because the rock mass behavior is significantly governed by the presence of joints or other discontinuities, several types of slope failure, such as plane failure, wedge failure, toppling failure, buckling failure and circular …
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Use and Measurement of Fully Softened Shear Strength
The fully softened shear strength was defined by Skempton (1970) as the peak drained shear strength of a clay in a normally consolidated state. All the experience available on the applicability of the fully softened shear strength for slopes is based on back-analyses. Back-analyses of first-time …
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Estudo da ruptura de fundo de uma escavação escorada
This dissertation presents stability studies of an excavation subject to bottom heave. Results of a geotechnical investigation including in situ and laboratory tests are presented. Seepage analyses under transient and steady conditions are performed to examine the effects of water flow on the …
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Numerical Investigation of the Structural Integrity of Silicon Carbide and Copper Heat Sink
… through forced convection. In our implementation of the heat sink, water passes through the microchannels. This configuration has direct applications to many microelectronic settings, specifically 2.5D electronic packaging where there are copper and silicon components bonded together. When …
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Calculated versus measured static capacity for two pile types
The Missouri Department of Transportation decided to replace two bridges in northeast New Madrid Country, Missouri. The bridges were in service for approximately 50 years and both were founded on driven piles. The bridge on Route WW (A-2141) was founded on driven steel shells which were then filled …
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Design and implementation of liquid cooling system for ArchiMITes vehicle
… five lithium ion batteries that generate a total of 700 W of heat. Without a cooling system, the batteries will quickly rise above 50 'C and become damaged. This project seeks to design and put together a liquid cooling system to remove the heat from the batteries. Calculations indicate that the …
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Reliability analyses for foundation and soil reinforcement applications
… for reliability analysis and resistance factor calibration of pile foundations. The sensitivity of the probability of failure and resistance factor to probability distribution type is evaluated. A closed-form solution and Monte Carlo simulation methods are commonly used for the …
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The Investigation Of Okhissa Dam Using A Real-Time Monitoring System
According to the National Inventory of Dams (NID), the United States has approximately 87,000 dams. Many of these dams are more than 50 years old and need to be investigated to ensure their safety to the public. A real time monitoring system can obtain a more reliable evaluation of the dam’s …
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