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 21 for “"In-situ test"”.
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An evaluation of the utility of four in-situ test methods for transmission line foundation design
A major powerline is typically supported by many widely spaced structures. Each structure is, in turn, supported by a foundation or foundations. The prevailing philosophy behind transmission structure design to date has been based on the notion that information for geotechnical conditions is sparse …
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Load and resistance factor design of drilled shafts in shale using SPT and TCP measurements
… design methods for design of drilled shafts in shale and other weak rock. These methods are generally based on Load and Resistance Factor Design (LRFD) methods that relate uniaxial compressive strength measurements of rock cores to the side and tip resistance for drilled shafts. However, …
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Development of an Energy-based Liquefaction Evaluation Procedure
Soil liquefaction during earthquakes is a phenomenon that can cause tremendous damage to structures such as bridges, roads, buildings, and pipelines. The objective of this research is to develop an energy-based approach for evaluating the potential for liquefaction triggering. The current …
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Numerical Validation and Refinement of Empirical Rock Mass Modulus Estimation
A sound understanding of rock mass characteristics is critical for the engineering prediction of tunnel stability and deformation both during construction and post-excavation. The rock mass modulus of deformation is a necessary input parameter for many numerical analysis methods to describe the …
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Análise de fundações de máquinas sujeitas a excitações verticais
The aim of this research was to compare in situ test results with theoretical results of dynamic analyses used for machine foundation design. The tests were carried out on blocks submitted to vertical harmonic excitation with amplitude as function of frequence. In the analyses the soil was …
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Ensaios de palheta de campo em argilas moles da Baixada Fluminense
Describes an experiment using a "Field Vane Test Apparatus", to determine the in situ shear strength of three deposits of a very soft plastic clay in Rio de Janeiro, Brazil. The author comments the performance of the equipment used and suggests some modifications. A bibliographic review on this …
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Uncovering the link between twin-twin interactions and damage nucleation in an (α+β) Ti alloy
… a (α+β) Ti alloy was developed with an outstanding combination of both high strength and high ductility; however, the plasticity micromechanisms that lead to damage nucleation for this alloy had not yet been investigated in detail. In this work, post-mortem analysis and an in-situ SEM-EBSD …
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Characterizing Water as Gap Fill for Double Glazing Units
… use of sunlight has always been a major goal in the design and operation of commercial buildings to minimize electrical consumption of artificial lighting systems. Glazing systems designed to allow optimal visible light transmission also allow significant unwanted direct solar heat gain caused …
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High-Resolution Characterization of Micro-Scale Crack Tip Fields in Zirconium
Zirconium (Zr) alloys are widely used in nuclear reactors as structural core components owing to their low thermal neutron absorption cross-section and adequate mechanical and corrosion properties. To ensure the sustainable design and safe operation of nuclear reactors, understanding the failure …
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Numerical Analysis of RAP Elements under Dynamic Loading
… New Zealand, Earthquake Sequence (CES) resulted in 185 fatalities and approximately $NZ40 billion in damage, much of which was due to liquefaction and related phenomena. As a result, an extensive soil improvement field testing program was initiated and Rammed Aggregate Piers� (RAP) were shown to …
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Gain scheduling for geometrically nonlinear flexible space structures
A gain-scheduling approach for the control of geometrically nonlinear structures is developed. The objective is to improve performance over current linear design techniques that are applied to the same control problem. The approach is applicable to a variety of structures that have complex dynamics …
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Material Characterization and Numerical Techniques for Accurate Prediction of Snow-Tire Interactions
… for tire manufacturers, typically evaluated using standardized methods such as ASTM F1805-20. However, physical testing presents substantial limitations, including limited access to winter proving grounds, difficulties in maintaining consistent test conditions and high prototyping costs. This …
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Characterization and Modeling of Deformable Soils for Tire Performance Simulations
The accurate prediction of tire-soil interaction plays a crucial role in the optimization and design of off-road machinery used for agricultural, defense, construction, and mining applications. The tire-road interaction studies focus solely on road roughness and friction between rubber and asphalt …
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Numerical Simulations of Spread Foundations Supported on Stone Columns Using the Discrete Element Method
… improvement technique has become more popular in geotechnical construction practice as a result of their ability to improve strength, stiffness and permeability characteristics of weak clayey soil deposits. There are several analytical and empirical approaches to estimate the bearing capacity …
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Evaluation of the electrical density gauge for in-situ moisture and density determination
Densification of soil during construction of earth structures is achieved through the process of compaction by application of mechanical energy to obtain the required engineering properties of the soil for a particular project such as hydraulic conductivity, soil strength and compressibility. These …
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Analysis and modeling of coupled thermo-hydro-mechanical phenomena in 3D fractured media = Análisis y modelización de fenómenos acoplados termo-hidro-mecánicos en medio fracturado
… la Universidad Politécnica de Madrid (UPM) y el Institut National Polytechnique de Toulouse (INPT). Trata un asunto de interés tanto nacional como internacional como es el almacenamiento de residuos radiactivos en almacenamientos geológicos profundos de tipo granítico. El presente trabajo se …
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The Effects of Vibration on the Penetration Resistance and Pore Water Pressure in Sands
The current approach 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 …
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Antimicrobial and antioxidant active packaging incorporated with hop (Humulus lupulus L.) extract: development, characterization and application in meat product
… to fossil-based plastics has grown abruptly in recent years, leading to the investigation of biopolymers as possible substitutes and, in special, polylactic acid (PLA) has shown good prospects in many industrial areas. In parallel, active packaging using biopolymers has gained interest as an …
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Engineering properties and behavior of silty soils
Silty soils, which exhibit engineering behavior intermediate between sands and clays, pose persistent challenges in geotechnical engineering due to their variable fabric, partial drainage behavior, and difficulty in classification and sampling. This dissertation presents a comprehensive …
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Properties of functionally graded concrete slabs
The first part of this research project examined the feasibility of developing a fracture test that was easy to perform in the field. The standard fracture test involves using a three-point beam setup (SEN(B)). The SEN(B) geometry is extremely difficult and time consuming to extract from the field …
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