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 19 of 19 for “"Structural collapse"”.
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Parameters Influencing Seismic Structural Collapse with Emphasis on Vertical Accelerations and the Possible Related Risks for New and Existing Structures in the Central and Eastern United States
… studies. The first study involved identifying structural and earthquake parameters that influenced seismic structural collapse. The parameter study involved nonlinear dynamic analyses using single-degree-of-freedom (SDOF) bilinear models. Four parameters were associated with the SDOF models — …
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Stochastic prediction of collapse of building structures under seismic excitations
… event by ensuring acceptably small likelihood of structural collapse. Therefore, accurate estimate of collapse likelihood of buildings under seismic excitations has recently become critical in efforts to promote hazard-resilience of the society, especially in developing national building codes, …
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Simulation of low-velocity impact damage in sandwich composites
… result in significant strength reduction or even structural collapse. A detailed understanding of the extent and nature of impact damage is thus greatly needed for damage tolerance based structural design and a reliable estimation of the residual strength of a damaged structure. In this thesis, …
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A study of intumescent coatings
… damage would. occur, thus avoiding premature structural collapse. The studies presented in this thesis have been directed towards an understanding of intumeseent coatings and the process of intumescence. The kinetics and mechanism of intumeseence are discussed. The behaviour of the raw …
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Dynamic Analysis of an Inflatable Dam Subjected to a Flood
… element model was used to determine the dynamic structural response of the dam. The problem was solved in the time domain which allows the prediction of a number of transient phenomena such as the generation of upstream advancing waves, and dynamic structural collapse. Stresses in the dam …
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Time-dependent response of flat plate structures under high sustained load
… that may eventually lead to partial or complete collapse. In the past decade, previous research has considered disproportionate collapse by looking at the instantaneous removal of one member. However, the overall time-dependent response of the member and how that response can lead to structural …
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Iceberg-keel ploughmarks on the seafloor of Antarctic continental shelves and the North Falkland Basin: implications for palaeo-glaciology
… threshold predicted to trigger ice-cliff structural collapse and calving by marine ice-cliff instability (MICI) processes. Thus, ploughmarks provide the first observational evidence of rapid retreat of the palaeo-Pine Island-Thwaites ice stream, driven by MICI processes commencing ~12.3 …
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Applied Aerial Autonomy for Reliable Indoor Flight and 3D Mapping
… damaged by shelling, fire, floods, and structural collapse. These systems can gather critical visual and locational data, aiding in hazard assessment and rescue planning without risking human lives. Reliable UAS deployments requires advanced sensors and robust algorithms for real-time …
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Mattress fires and their effect on the destruction and distribution of remains in a house-fire setting
… a body and dispersal of skeletal remains during structural collapse. In order to answer these questions, I first investigated the limited contribution of a mattress alone to the burning of a body. By burning pig (Sus scrofa or Sus domestica) carcasses in a controlled environment, I determined …
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Mechanistic studies of ion binding and inactivation in the potassium channel KcsA by solid state NMR
… with high ion occupancy and at low potassium it collapses into a non conductive state with reduced ion occupancy. We report solid-state NMR resonance assignments for ~ 200 15N and 13C atoms in KcsA using two and three dimensional correlation spectroscopy. Using the assignments we characterize the …
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Behavior and performance of steel moment-framed buildings subject to dynamic column loss scenarios
Progressive or disproportionate collapse occurs when localized structural damage leads to widespread collapse or failure of a structure. Although the loss of any structural component in a building has the potential to initiate progressive collapse, structural columns in steel buildings are …
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Imóveis urbanos abandonados: a responsabilidade do prefeito pela não arrecadação
… abandoned properties that, while symbolizing the structural collapse of Brazilian cities, conceal immense transformative potential — capable of reshaping the urban landscape, ensuring the realization of fundamental rights, and restoring the social function of property. Despite this transformative …
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Mechanochemistry of metal-organic frameworks under compression
… energy absorption via an internal volume collapse mechanism. In this dissertation, the mechanical and mechanochemical behaviors of MOFs under compression, especially their energy absorption during plastic deformation, are explored. The structural impact of static, bulk compression has been …
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Crystalline, Amorphous, and Liquid Metal-Organic Frameworks at Non-Ambient Conditions
… it was soon discovered how diverse the structural responses of these low-density materials are when, for example, heated or compressed. Such structural changes range from the simple loss of pore-occupying solvent molecules to intricate sequences of structural phase transitions. Some MOFs …
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Influencia de las adiciones puzolánicas en los morteros de restauración de fábricas de interés histórico-artístico
… siempre que no haya riesgo de un colapso estructural inminente. Dado que los morteros hidráulicos, y los materiales que los componen, se estudian a menudo para otras prestaciones con requisitos opuestos a conservación y restauración del patrimonio, donde existen grandes lagunas en este …
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Multiphase Fluid-Material Interaction: Efficient Solution Algorithms and Shock-Dominated Applications
… dynamics solver and a nonlinear finite element structural dynamics solver. Within this framework, the fluid-structure and liquid-gas interfaces are tracked using embedded boundary and level set methods. Then, the developed computational framework is applied to study the behavior a bilayer …
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Characterization of carbon ablators for hypersonic thermal protection systems
… led to in-depth fiber weakening, spallation, and structural collapse, a phenomenon with critical implications for material integrity in-flight. Time-resolved thermal and mass transport properties were extracted using Porous Microstructure Analysis (PuMA) software, revealing surface-localized …
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Geochemical studies on antimony: antimony dispersion in water draining Su Suergiu mine area; removal of Sb(V) from aqueous solution by layered double hydroxides (LDH)
… Cl-, NO3-, CO32-) in the interlayer, where also structural water can occur. From an environmental point of view, LDH have anion exchange capacity, sorption capacity, high specific surface area and the “memory effect”, which is the capacity of the calcined phases which have undergone structural …
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Relationship between inflation rate and wage rate before and after inflation targeting periods in South Africa
… during the early 1980s could be attributed to structural transition to quantitative approach to monetary policy in 1985. Moreover, high volatility recorded among productivity, inflation rate and wage rate in 2020 could be attributed to the structural shock of the COVID-19 pandemic. Based on …