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Dissertations / Theses on the topic 'Fire conditions'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Parkinson, David L. "Performance based design of structural steel for fire conditions." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0821102-115014.

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2

Ramli, Sulong Nor Hafizah. "Behaviour of steel connections under fire conditions." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424307.

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3

Johann, Matthew A. "Fire-Robust Structural Engineering: A Framework Approach to Structural Design for Fire Conditions." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-1219102-155849.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: structural engineering; fire safety; framework approach; performance-based design; information management; finite element; lumped-parameter; laboratory tests; steel; beam; restrained; plastic analysis. Includes bibliographical references (p. 180-182).

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4

El-Rimawi, J. A. "The Behaviour of Flexural Members under Fire Conditions." Thesis, University of Sheffield, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608342.

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5

Yin, Yingzhi. "Advanced behaviour of steel beams under fire conditions." Thesis, University of Manchester, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.680205.

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6

Oosthuizen, Phillip. "Assessment of steel structures subjected to fire conditions." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/5013.

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Hu, Ying. "Robustness of flexible endplate connections under fire conditions." Thesis, University of Sheffield, 2010. http://etheses.whiterose.ac.uk/14969/.

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Worldwide interest in how to prevent the progressive collapse for tall and large buildings under exceptional loading conditions was heightened by the collapse of the twin towers at the World Trade. The performance of steel-framed structures subjected to fire loading is heavily reliant on the interaction between structural members such as columns, slabs and beams. The implicit assumption in fire engineering design is that bolted connections are able to maintain the structural integrity for a large and tall building under fire conditions. Unfortunately, evidence from the collapse of the World Tr

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8

Bausano, John Vincent. "Structural Integrity of Polymer Matrix Composites Exposed to Fire Conditions." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31473.

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Polymer matrix composites (PMCâ s) perform well under many loading conditions and situations. Exposure of PMCâ s to fire is a concern due to their inherent material degradation at elevated temperatures. The elevated temperature response of PMCâ s to combined thermal and mechanical loads are especially of concern. PMC thermal and mechanical properties undergo transformations at elevated temperatures. Some of these effects are reversible if the maximum temperatures are lower than approximately 200ÂºC. The stiffness is significantly reduced at elevated temperatures but if the applied tem

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DeJoseph, Joelle. "Analysis of fire conditions in a closed-end tunnel." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1453.

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Thesis (M.S.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Dept. of Fire Protection Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Song, Yuanyuan. "Analysis of industrial steel portal frames under fire conditions." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500178.

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11

Lane, Barbara. "The response of steel frame structures under fire conditions." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/12119.

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In June 1990 a fire occurred in a large contractors' hut on the first floor of a 14 storey steel framed building in the Broadgate development. Despite large deflections the structure behaved well and there was no collapse of any of the beams, columns or floors. A major investigation was undertaken of the fire and the structural performance. It was concluded that the building behaved as a framework of elements though designed as a collection of isolated elements. The connections were able to accommodate large deformations and forces without failure. Hence when the framework acts as a total enti

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12

Hoang, Ha. "Structural Continuity Effects in Steel Frames under Fire Conditions." Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-theses/420.

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Fire has always been one of the most serious threats of collapse to structural building frames. The September 11 incident has stimulated significant interests in analyzing and understanding the behavior of the structures under fire events. The strength of the material decreases due to the elevated temperature caused by fire, and this reduction in strength leads to the failure of the member. Frames that do not have sufficient ductility can suffer progressive collapse of the entire structure if one member fails during a fire event. Such collapse could result in loss of human life and serious eco

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13

Legrand, Pierre. "Structural assement and design of concrete structures under fire conditions." Thesis, KTH, Betongbyggnad, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187886.

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Behaviour under fire circumstances is becoming more and more crucial for designing a concrete structureand authorities require more often a fire-resistance time. In fact, engineers need a powerful, user-friendly,accurate and non time-consuming method that can be used to design reinforced concrete structures. Inthis study, the author has developed a method to design any fire-exposed reinforced concrete crosssections under flexure that takes into account second order effect. The first part focuses on the thermal analysis of the reinforced concrete cross section. Fourier'sequation is solved using

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14

Gillie, Martin. "The behaviour of steel-framed composite structures in fire conditions." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/1466.

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Over the last decade it has become increasingly clear that the traditional methods of fire safety design can be unnecessarily conservative and therefore expensive. In 1995 a series of fire tests were carried out at Cardington, UK on a full-scale eight storey steel-concrete composite building. These tests produced an extensive body of data about the response of such structures to fire conditions and it is intended that this data be used to develop a clearer understanding of the structural behaviour involved. This thesis presents a method of analysing the behaviour of structures such as the Card

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15

Seputro, Jenny. "Effect of Support Conditions on Steel Beams Exposed of Fire." University of Canterbury. Civil Engineering, 2001. http://hdl.handle.net/10092/8293.

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The performance of steel structures at elevated temperature is determined by many factors. This report describes the analytical investigation of a single span steel beam using the nonlinear finite element program, SAFIR. Four support conditions and additional axial spring were used to model structural elements with various level of axial and flexural restraint. Different fires were applied and the effect of the applied load, number of fire-exposed sides and location of the line of support were analysed in terms of the midspan deflection, bending moment distribution and axial force in the axia

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Yuan, Jifeng. "Intumescent coating performance on steel structures under realistic fire conditions." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498956.

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Intumescent coating, as a new generation of fire proof material, has obvious advantages over traditional fire protection materials. The applications of intumescent coating are widely ranged and it has become dominant in the fire engineering market. However, the present method of assessment in EN 13381 Part 4 is not suitable for applications of intumescent coating under realistic fire conditions, because intumescent coating behaviour is not only temperature dependent, but also fire exposure dependent. The failure of currently available method to give accurate predictions of intumescent coating

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17

Smith, Holly Kate Mcleod. "Punching shear of flat reinforced-concrete slabs under fire conditions." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/20962.

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This thesis examines punching shear response of reinforced-concrete flat slabs under fire conditions. The shear behaviour of concrete in fire is relatively poorly understood compared to its flexural response. Failures such as the Gretzenbach car park failure in Switzerland (2004) have prompted concerns over the punching shear capacity of flat slabs in fire. The shear behaviour of reinforced-concrete in fire depends on degradation of the individual material properties with temperature, their interaction, and more recently recognised, the effects of restrained thermal expansion. Through experime

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18

Figueroa, Michael. "Dynamic Analysis of a Light Wood-Framed Structure during Fire Conditions." Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-theses/777.

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The purpose of this project is to create a theoretical dynamic analysis model to assess the dynamic response of light, wood-framed structures before and after fire conditions. This information is useful for predicting the damage to structural integrity due to a fire. The mass and stiffness matrices used for the dynamic model are derived from a standard residential building created for an existing project at WPI funded through the DHS/FEMA/USFA Assistance to Firefighters Grant program. The damping matrix is derived via the Rayleigh Damping Method using the mass and stiffness matrices obtained t

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19

Ziemba, Gilead Reed. "Theoretical analysis of light-weight truss construction in fire conditions, including the use of fire-retardant-treatment wood." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-050506-114556/.

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Twomey, Brian M. "The performance and behavior of lightweight wood exposed to fire conditions." Link to electronic thesis, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-050207-154942/.

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21

Saab, Hassan A. "Non-linear finite element analysis of steel frames in fire conditions." Thesis, University of Sheffield, 1990. http://etheses.whiterose.ac.uk/1868/.

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The present work is concerned with the development of a finite element approach and its subsequent use for behavioural studies on steel frames in fire conditions. The nonlinear structural analysis is based on a tangent stiffness formulation using large deformation theory. Deterioration in material strength and stiffness at increasing temperature is represented by a set of nonlinear stress-straintemperature relationships using a Ramberg-Osgood equation in which creep effects are implicitly included. The clearly nonlinear form of steel material properties at elevated temperatures is better repre

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22

Boboulos, Miltiadis A. "Fire spread in low rise vegetation with application to Mediterranean conditions." Thesis, University of Portsmouth, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.478894.

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23

Mohammad, Mahdi Raouffard. "Structural Behavior of Reinforced Concrete Elements and Subassemblies under Fire Conditions." Kyoto University, 2018. http://hdl.handle.net/2433/231999.

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24

Linde, Marika. "Fire extinguisher mount for vehicles : Adapted for mining conditions and emergencies." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-69585.

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This report revolves around a project for Boliden which is a thesis work for a master in engineering within industrial design engineering. This project had a primary focus of developing a new mount for fire extinguishers that will be suspended on vehicles in Boliden's mines. The foundation of the project was an accident in Boliden's mine Aitik where a fire extinguisher exploded due to damages caused by the vehicle mount in combination with vibrations. The objective of the project is to identify the main problem with the vehicle mounts used today in Boliden's mines and solve it. The process use

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25

Boncu, Altan. "Structural Fire Safety Of Standart Circular Railroad Tunnels Under Different Soil Conditions." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12609537/index.pdf.

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In many tunnel designs, reinforced concrete tunnel lining design is selected based on construction requirements rather than design loads. A constant cross-section is typically used along a tunnel even if the design loads change from one location to another, especially for tunnels constructed by tunnel boring machines (TBM). Factor of safety against failure is not constant along the length of tunnel and is typically high at shallow depth regions. Factor of safety during a rare event is usually much less than the ones set for service load states. Rare events such as earthquake, train derailment,

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26

Arakelian, Andrea Katherine. "Strength analysis of bolted shear connections under fire conditions using the finite element approach." Worcester, Mass. : Worcester Polytechnic Institute, 2008. http://www.wpi.edu/Pubs/ETD/Available/etd-122208-145717/.

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27

Jafarian, Mostafa. "Behaviour of reverse channel connection to concrete filled hollow tube columns under fire conditions." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/behaviour-of-reverse-channel-connection-to-concrete-filled-hollow-tube-columns-under-fire-conditions(f60a80b2-a053-49d7-bbaf-22de4291a8e3).html.

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This thesis presents the results of a research project to investigate the behaviour of the two components of a reverse channel connection to concrete filled tubular sections: the reverse channel and the steel tubular section, at both ambient and elevated temperatures. This research forms part of a European Union funded project on the robustness of joints to composite columns under fire conditions. The specific objectives of this research are to develop methods of quantifying the load-deformation behaviour at various temperatures of the two components. This research has been carried out through

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28

Tukaew, Panyawat. "Outdoor Gas Emission Sampling System: A Novel Method for Quantification of Fires in Outdoor Conditions." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-theses/656.

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This study presents the design, construction and testing of an Outdoor Gas Emission Sampling (OGES) System capable of gas sampling and calorimetry in outdoor conditions with wind. In large-scale, outdoor fire tests, wind-driven emission plumes present a challenge in heat release rate quantification because the emission plume rises upward at an angle. A new gas sampling system with a flexible hood design and smaller control volume has been designed and tested. Bulk flow rate, oxygen, carbon dioxide, and carbon monoxide concentrations are measured for heat release rate calculations. Two stages o

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29

Hughes, Sian E. "Adults who deliberately set fires : the utility of fire-setting intervention programmes for mentally disordered offenders." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3705/.

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This thesis explores both the utility and effectiveness of psychological interventions in addressing fire-setting behaviour amongst adults. Chapter one explores the heterogeneous nature of this population in terms of the behaviour, the personal characteristics, and the motivations. By outlining multi-factorial theories, it explores why adults intentionally set fires and the implications that this has on the development of psychological interventions. Chapter two provides a critical appraisal of the Millon Clinical Multiaxial Inventory (3rd Edition) as an assessment of personality disorder and

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30

Graham, Earl Vincent. "Developing a remotely-sensed framework for fire monitoring in the Western Cape, South Africa." University of Western Cape, 2021. http://hdl.handle.net/11394/8334.

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>Magister Scientiae - MSc<br>For a long time, fire dynamics has been misunderstood and viewed as either a destructive force or an ecological necessity. The Western Cape Province in South Africa experiences the frequent occurrence of fires, due to the prevailing Mediterranean climatic conditions. This climate is known for its hot and dry summers and its cold and wet winters, which, along with the highly flammable indigenous flora of the Western Cape, provide suitable conditions for the occurrence of fires. However, the local environmental and ecological variables that influence the occurrence o

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31

Entrup, Alex K. "Restoration of a wet longleaf pine (Pinus palustris) savanna in southeast Louisiana: Burning toward reference conditions." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/2068.

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This study quantifies the changes in vegetation composition and structure of a fire-excluded Pinus palustris (longleaf pine) wetland savanna restoration site in southeastern in comparison to a proximate contemporary reference site. The restoration site was invaded by hardwood species and off-site pines, and never underwent extensive soil disturbance. The restoration treatments involved logging across portions of the site and the reintroduction of fire across the entire site. All species present in 10m2 quadrats were recorded prior to treatment and throughout the 17 year study at reference and

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32

Emberley, Richard Lawrence. "A Study into the Behavior of Reinforced-Concrete Columns under Fire Exposures using a Spreadsheet-Based Numerical Model." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-theses/1168.

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Fire is a significant threat to the structural integrity of buildings. Depending on the architecture of the structure and the intensity and duration of the fire event, structural members may lose strength and stiffness eventually leading to collapse whether by flexural buckling or crushing. The focus of this research is on the behavior and fire performance of reinforced-concrete columns under fire conditions. In order to effectively study column performance with differing loading, aggregate and dimensional characteristics under varying time-temperature curves and fire exposures, a numerical mo

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33

Suzanne, Mathieu. "Conditions d'utilisation de modèles numériques pour l'évaluation de scénarios de départ de feu dans un cadre d'investigation post-incendie." Phd thesis, INSA de Rouen, 2009. http://tel.archives-ouvertes.fr/tel-00557898.

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Devant le besoin de nouveaux outils d'aide à l'investigation post-incendie, cette thèse se propose d'évaluer le recours à des modèles numériques pour apprécier un scénario proposé par un expert. Pour cela, les conditions d'utilisation de la version 4 de Fire Dynamics Simulator (FDS) ont été déterminées dans une optique de reconstitution de sinistres. Une méthode a ensuite été développée afin de confronter les résultats des simulations aux observations faites lors de l'investigation : cette méthode se base sur l'utilisation de multiples points de comparaison qui sont des effets thermiques ou mé

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34

Naili, El-Hadi Ali. "Behaviour of cellular beams having different opening sizes, steel decking shapes and restraint effect in fire conditions." Thesis, Ulster University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.568793.

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The growing popularity of the use of cellular steel beams in composite floors comes at the same time as an increasing attention to fire safety engineering design. The recommendation for their design in fire limit states remains very primitive and this is due to the lack of general research in this area. A total of six simply-supported and restrained composite cellular floor beams subjected to elevated temperatures, were tested at The University of Ulster. The first three beams conducted were simply-supported of 4.5 m span lengths, with main variables, different steel geometries and opening sha

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35

Boyd, Steven Earl. "Compression Creep Rupture of an E-glass/Vinyl Ester Composite Subjected to Combined Mechanical and Fire Loading Conditions." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/29896.

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Polymer matrix composites are seeing increasing use in structural systems (e.g. ships, bridges) and require a quantitative basis for describing their performance under combined mechanical load and fire. Although much work has been performed to characterize the flammability, fire resistance and toxicity of these composite systems, an understanding of the structural response of sandwich type structures and laminate panels under combined mechanical and thermal loads (simulating fire conditions) is still largely unavailable. Therefore a research effort to develop a model to describe the structural

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36

Gala, Kaci Jo. "Design of a new narrow channel apparatus that simulates low gravity conditions for producing near limit flames." Diss., Connect to online resource - MSU authorized users, 2007.

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37

Pearce, Jeremy Arthur. "The effect of preparation conditions on the morphological and fire retardant properties of zinc hydroxystannate and its derivatives." Thesis, Brunel University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260514.

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38

Franzoni, Lorenzo. "Mechanical behavior of regularly spaced Cross Laminated Timber panels : Modeling and experimental validation in ambient and fire conditions." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1113/document.

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Les panneaux en bois lamellé croisé (en anglais CLT - Cross Laminated Timber) sont des éléments de structure composés de couches en bois collées entre eleese et empilées de façon croisée. Chaque couche est composée de planches en bois juxtaposées et généralement non collées sur leur chants. Dans cette thèse, nous étudions l'influence sur le comportement mécanique des espacements entre planches des panneaux avec une approche par modélisation et expérimentation. Les panneaux CLT standard sont considérés comme des panneaux avec des espacements de très faible dimension par opposition aux panneaux

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39

Chythanya, Meghana. "Finite element analysis on the effect of fire for specified duration, on a reinforced concrete beam with varied boundary conditions." Tallahassee, Florida : Florida State University, 2009. http://etd.lib.fsu.edu/theses/available/etd-05082009-160338/.

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Thesis (M.S.)--Florida State University, 2009.<br>Advisor: Lisa K Spainhour, Florida State University, FAMU-FSU College of Engineering, Dept. of Civil and Environmental Engineering. Title and description from dissertation home page (viewed on Nov. 4, 2009). Document formatted into pages; contains xiii, 77 pages. Includes bibliographical references.

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Sandström, Joakim. "Thermal boundary conditions based on field modeling of fires : Heat transfer calculations in CFD and FE models with special regards to fire exposure represented with adiabatic surface temperatures." Licentiate thesis, Luleå tekniska universitet, Byggkonstruktion och -produktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17367.

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Combining computer fluid dynamic, CFD, models with finite element, FE, models to calculate temperature in fire exposed structures can reduce design temperatures in structures while still obtaining the level of structural fire safety stipulated by society. A better understanding of heat transfer and the concept of adiabatic surface temperatures, AST, the transition of data between models can be simplified and more accurate temperature predictions can be made.The thesis focuses on heat transfer calculations by employing AST in particular, and how this can be used as a means of coupling any CFD a

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Molbeck, Blyth Marco Aurelio, and Vega María Isabel Acosta. "Extendable ladder cover solution for swedish fire vehicles." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12641.

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The following thesis project has been done in direct collaboration with Autokaross i Floby AB Rescue Vehicle Department, in Sweden. The report contains the design development of a protective cover against weather conditions for the extendable ladder in a fire vehicle. The aim of the report has been to develop a functional and low cost solution cover for the FEL on a fire truck, which is allocated on the roof, with the express intention of providing adequate access and protection against weather conditions in Nordic countries, so as to prevent premature deterioration of the FEL unit. The com

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Johnston, Michael C. "Growth and Extinction Limits: Ground Based Testing of Solid Fuel Combustion in Low Stretch Conditions in Support of Space Flight Experiments." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1511915506999995.

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Maureira, Fabiola. "Favoriser la construction d’un collectif apprenant : les conditions organisationnelles du développement des compétences d’un collectif éphémère." Thesis, Paris, CNAM, 2015. http://www.theses.fr/2015CNAM1018/document.

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Cette recherche cherche à identifier les conditions organisationnelles contribuant à la création et au développent d’un collectif apprenant dans un centre de coordination et contrôle des feux de forêt au Chili. L'objectif poursuit est de rendre opérationnel un équipe temporaire visant à gérer des situations dynamiques, complexes et potentiellement risquées. Dans ce contexte, la formation rapide des novices et la mise à jour des savoirs et des savoir-faire des opérateurs expérimentés constitue un enjeu important pour le développement des compétences et pour devenir un collectif opérationnel. À

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Foster, Richard Douglas. "Fire, Soil, Native Species and Control of Phalaris arundinacea in a Wetland Recovery Project." [Johnson City, Tenn. : East Tennessee State University], 2003. http://etd-submit.etsu.edu/etd/theses/available/etd-0411103-140848/unrestricted/FosterR04162003f.pdf.

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Thesis (M.S.)--East Tennessee State University, 2003.<br>Title from electronic submission form. ETSU ETD database URN: etd-0411103-140848. Includes bibliographical references. Also available via Internet at the UMI web site.

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Kozlowski, Donald F. "Pre-fire functional condition and post-fire channel changes in northern Nevada streams 1999-2001 fires /." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1447637.

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Maluk, Cristian. "Development and application of a novel test method for studying the fire behaviour of CFRP prestressed concrete structural elements." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/15926.

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A novel type of precast, prestressed concrete structural element is being implemented in load-bearing systems in buildings. These structural elements combine the use of high-performance, self-consolidating concrete (HPSCC) and non-corroding carbon fibre reinforced polymer (CFRP) prestressing tendons; this produces highly optimized, slender structural elements with excellent serviceability and (presumed) extended service lives. More widely, the use of new construction techniques, innovative materials, and ground-breaking designs is increasingly commonplace in today's rapidly evolving building c

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Andersson, Lucas. "Shadow effects in open cross-sections : An analysis of steel temperatures with COMSOL Multiphysics, TASEF and Eurocode." Thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70086.

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Steel is a material commonly used in various constructions such as high-rise buildings, sport arenas, ships etc. Steel is a versatile building material due to its isotropic characteristics, e.g. both high tensile- and compressive strength. This allows steel to be formed into open section profiles which reduces material usage but simultaneously allows the tensile- and compressive stress resistance to be high in directions were loads are applied. Although steel has a high stress resistance its sensitivity to fire is larger than other building materials due to its high thermal conductivity. The s

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Phan, Minh Tuyen. "Modélisation explicite de l’écaillage sous incendie du béton : approche thermo-hydro-mécanique avec des conditions aux limites évolutives." Thesis, Paris Est, 2012. http://www.theses.fr/2012PEST1155/document.

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Dans les dernières années, les incendies majeurs dans les tunnels ont causé des dommages importants. Dans ces conditions extrêmes (la température dépasse rapidement 1200 °C), l'augmentation de pression dans les pores, la dilatation thermique empêchée, l'incompatibilité de dilatation thermique entre la pâte du ciment et des granulats, la déshydratation ... sont des principaux mécanismes de dégradation qui peuvent être à l'origine de l'écaillage. L'écaillage progressif pendant l'incendie se manifeste par le détachement de la surface du béton par petits morceaux réduisant ainsi la section résista

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Vega, Thomas. "Quantification of the Fire Thermal Boundary Condition." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/78052.

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Abstract:

The thermal boundary condition to a fire exposed surface was quantified with a hybrid heat flux gage. Methods were developed to determine the net heat flux through the gage, incident heat flux, cold surface heat flux, convective heat transfer coefficient, adiabatic surface temperature, and the separated components of radiative and convective heat flux. Experiments were performed in a cone calorimeter with the hybrid gage flush mounted into UNIFRAX Duraboard LD ceramic board. The results were then compared to results obtained with a Schmidt-Boelter gage and a plate thermometer. The hybrid heat

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50

Baydoun, Ramez. "Modélisation de l'écaillage sous incendie des bétons par une approche thermo-hydro-mécanique du comportement : Analyse paramétrique des différents mécanismes d'occurence." Thesis, Rennes, INSA, 2019. http://www.theses.fr/2019ISAR0012.

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Abstract:

L'écaillage du béton sous incendie est une instabilité qui consiste en l'expulsion du matériau béton sous forme d'écailles à partir de la surface exposée au feu. L'analyse du phénomène d'écaillage nécessite comme préalable la compréhension et la caractérisation du comportement à chaud des bétons. Dans cette thèse, un modèle éléments finis THM est développé pour simuler le comportement à haute température, en particulier sous feu à développement rapide, de différents types de béton (dl béton ordinaire à ultra hautes performances). La partie thermo-hydrique du modèle THM est basée sur l'approche

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