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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

BRANDSSPRIDNING I ÄLDRETRÄHUSBEBYGGELSE : Brandskyddsinventering av Rademachersmedjorna i centrala Eskilstuna

Ingelmark, Oscar January 2014 (has links)
Sedan forskning inom ämnet brandskydd för byggnader inleddes på 1900-talets andra hälfthar intresset för att bygga allt högre och mer komplexa byggnader ökat. I och med detta harhögre krav på brandskydd samt lagar och regler som beskriver de olika krav som ställsutvecklats.Äldre kulturhistoriskt viktiga bebyggelser i Sverige har svårt att uppfylla dessa krav.Samtidigt som det ställs höga krav på såväl organisatoriskt som byggnadsteknisktbrandskydd spelar byggnadernas kulturhistoriska värde en avgörande roll i hur brandskyddettillåts implementeras och i vilken omfattning. Det blir därför en avvägning mellan vad som ärmöjligt att göra ur brandskyddssynpunkt och ur en kulturhistorisk aspekt. I både Sverige ochNorge har man vid brandskyddsinventeringar kommit fram till ett flertalbrandskyddslösningar som varit möjliga att tillämpa.Ett exempel på dessa kulturhistoriska trähusbebyggelser är Rademachersmedjorna iEskilstuna. På mitten av 1600-talet beordrade den dåvarande konungen Karl X Gustaf att ettflertal stensmedjor skulle uppföras i Eskilstuna. I samband med konungens död 1660 föllplanerna och endast ett 20-tal smedjebyggnader uppfördes och då istället i trä. Endast sex avdessa smedjebyggnader finns bevarade och utgör de Rademachersmedjor som området ärkänt för idag.Syftet med denna studie är att genom systematiska fältstudier skapa en översikt över ochdokumentera Rademachersmedjornas nuvarande brandskydd. Utifrån detta materialvisualiseras områdets byggnadstekniska brandskydd samt riskzoner på ett översiktligt sättför brukare, förvaltare och ägare. Vidare fokuseras arbetet på brandspridningsaspekten samtrespektive byggnads nuvarande brandskydd. Detta innebär att den kulturmässiga aspektenendast kommer att beröras översiktligt.Denna studie baseras på bedömningsmodellen Bedömning av brandskydd ikulturbebyggelse (härefter kallat BSV-k) och de delar denna omfattar. Detta innebär att detbefintliga brandskydd som inte omfattas av bedömningsmetoden inte kommer att bedömas,däremot kommer detta brandskydd översiktligt beröras i samband medbyggnadsbeskrivningarna.Av Rademacherområdets totalt 16 byggnader uppnår endast en byggnad brandskyddsnivånacceptabelt brandskydd. Detta medför att områdets totala brandskydd är bristfälligt sett urdagens brandskyddsperspektiv. På Rademacherområdet har uppmärksammats ett flertalzoner som utgör en högre risk för uppkomst av brand. Dessa högre utsatta riskzoner ärspridda över hela Rademacherområdet vilket innebär att en uppkommen brand i områdetsena del kan komma att spridas vidare till andra delar av området. I och med detta kan storadelar av området snabbt bli involverat. I dessa sammanhang är det viktigt att försöka undvikaatt brand över huvud taget kan uppstå. Sådana åtgärder är oftast av enklare karaktär och imånga fall de mest ekonomiskt fördelaktiga. Att ta bort brännbart material i anslutning tillbyggnaden, ta bort löst brännbart material på vindsutrymmen och i utrymningsvägar ärnågra brandförebyggande åtgärder som kan tillämpas på Rademacherområdet. Sådanabrandförebyggande åtgärder utgör delvis ett skydd mot brandspridning. I de fall därbyggnadernas avstånd till angränsande byggnader är mycket kort utgör potentiellabrandbärare, såsom papperskorgar och träplank, ett större hot till vidare brandspridning dåbranden har ett kortare avstånd till brandbäraren jämfört med den närliggande byggnaden.Det redan korta skyddsavståndet mellan två byggnader blir ännu mindre när en potentiellbrandbärare är placerad mellan byggnaderna. Detta innebär att branden kan spridassnabbare till närliggande byggnader och omfatta ett större område.För att nå en acceptabel brandskyddsnivå enligt BSV-k för Rademacherområdet i Eskilstunaräcker det i många fall att tillämpa brandförebyggande åtgärder, såsom att ta bort brännbartmaterial i vindsutrymmen och flytta undan papperskorgar från fasaderna. / It is very important to protect buildings against fire. Especially older wooden buildings andareas with a historically important heritage, i.e. areas that cannot be restored to their originalcondition upon loss. In Eskilstuna one such area is located - Rademachersmedjorna. Onbehalf of Eskilstuna Kommunfastigheter AB a documentation of Rademachersmedjorna’sconstructional fire protection has been conducted in this report in order to have the area'sfire protection level documented. The purpose of this study has been, via systematic fieldstudies, to provide an overview of Rademachersmedjorna and document the area’s currentfire protection level. Based on this information, a visualization of the area's constructionalfire protection and risk zones has been developed to give a simple overview for users,managers and owners. The inventory can be used by Eskilstuna Kommunfastigheter AB for aquick and easy visualization of Rademachersmedjorna’s fire protection level and risk zones.Furthermore, this information could be used as a basis for planning future safety preventionefforts. The documentation over the area is based on the assessment method Bedömning avbrandskydd i kulturbebyggelse (hereafter referred to as BSV-k) and the parts this methodincludes. There are a total of 16 buildings at the Rademacher area and only one buildingachieved an acceptable fire protection level according to BSV-k. There are several zones inthe area that pose a higher risk for the occurrence of fire and fire spread. These highervulnerable fire hazard zones are spread out over Rademachersmedjorna which means thatthe whole area quickly can get involved in case of fire. In this context it is important to avoidfire what so ever may arise. Removing combustible material in escape routes, in attics andcombustible materials nearby the buildings are some fire prevention measures which can beapplied. It is also important to note objects such as bins and wooden planks that existbetween the buildings being potential fire carriers. In cases where the buildings distance to anearby located building is very short, the potential fire carriers pose little threat as the firecan spread directly from building to building. To achieve an acceptable level of fire protectionfor Rademachersmedjorna - according to this study's assessment method - is sufficient inmany cases to apply fire prevention.
22

Hasičský a záchranný útvar hlavného mesta Bratislava / Fire and rescue department of the capital city of Bratislava

Komár, Jozef January 2012 (has links)
The aim of this thesis is the analysis and description of the operation of the fire and rescue department which operatates in the territory of Bratislava, capital of Slovakia. To prevent damages on the lives of people and their property, it is essential that fire protection units will arrive on the place of incident in the shortest possible time. Effective blanket deployment of fire protection units in the city area helps to ensure it. The work thus focuses on the assessment of the current state of this blanket deployment and also on layout of the new deployment of fire protection units, which would fulfill the requirements of the time range and number of units required to be at the place of incident for fire protection intervention.
23

Effects of partial fire protection on temperature developments in steel joints protected by intumescent coating

Dai, Xianghe, Wang, Y.C., Bailey, C.G. January 2009 (has links)
No / This paper presents experimental results of temperature distribution in fire in four typical types of steel-concrete composite joint (web cleat, fin plate, flush endplate and flexible endplate) with different fire-protection schemes. The test specimens were unloaded and the steelwork of each joint assembly was exposed to a standard fire condition [ISO 834, 1975: Fire Resistance Tests, Elements of Building Construction, International Organization for Standardization, Geneva] in a furnace. In total, 14 tests were conducted, including 4 tests without any fire protection and 10 tests with different schemes of fire protection. The main objective of these tests was to investigate the effects of three practical fire-protection schemes as alternatives to full fire protection of the entire joint assembly. The three alternative methods of fire protection were: (1) protecting a segment, instead of the entire length, of the beams; (2) unprotected bolts and (3) protecting the columns only. The main results of these tests are: (1) if all the steel work (excluding the bolts) in the joint assembly was protected, whether or not protecting the bolts had very little effect on temperatures in the protected steelwork other than the bolts. The bolt temperatures were higher if they were not protected than if they were protected, but the unprotected bolt temperatures in a joint with fire protection to other steelwork were much lower than bolt temperatures in a totally unprotected joint; (2) as far as joint temperatures are concerned, protecting a segment of 400 mm of the beam was sufficient to achieve full protection and (3) if only the column was protected, only the joint components that were in the immediate vicinity of the column (such as welds) developed noticeably lower temperatures than if the joint assembly was unprotected, but due to heat conduction from the unprotected steel beams, these temperature values were much higher than if the joint assembly was protected. Furthermore, the column temperatures in the joint region were much higher than the protected column temperatures.
24

The reliability based design of composite beams for the fire limit state

Van der Klashorst, Etienne 03 1900 (has links)
Thesis (MEng (Civil Engineering))--University of Stellenbosch, 2007. / In the past use was made of prescriptive design rules to provide for the fire limit state. Modern Design Codes provide the scope and the means to design for fire in a performance based manner. The Eurocode provides guidance on the actions on structures exposed to fire as well as methods to predict the structural behaviour of elements in fire. Structural designers can now incorporate the use of parametric fire curves to describe compartment fires. These fire models are not an extension of the old nominal standard temperature time curves. Parametric curves are analytical models that are based on natural fire behaviour. The temperature in the fire compartment can be predicted in a scientific manner taking account of fire loads, ventilation conditions and compartment characteristics. The combination of rational fire models and temperature dependant structural behaviour enables designers to predict whether elements will fail during a fire. This is an improvement on the empirical prescriptive fire resistance ratings, used to date. Multi-storey steel framed structures, with composite floors, were identified as structures with high inherent fire resistance and robust behaviour. The composite beams in the floor structure were identified as critical elements when subjected to fire. The deterministic design and the reliability level of these elements were studied. Deterministic fire design procedures are presented that can be used to design unprotected composite beams for the fire limit state. The reliability of the deterministic design procedures was evaluated through a First Order Reliability Method. Parametric fire curves are suitable for reliability analysis due to the fact that they can be described by stochastic variables. The fire load was determined to be the dominant variable influencing the reliability level of the composite beams. The ventilation conditions of the fire compartment also has important implications for the temperature development of the composite beams. The reliability analyses results show that reasonably sized composite beams can be used as unprotected elements in smaller fire compartments with moderate fire loads. It was found that a structural element’s total probability of failure can be improved by the use of active fire fighting measures. The benefit of active fire fighting measures can be quantified by considering their probability of failure. By use of conservative assumptions and basic knowledge of fire engineering principles, rational design methods can provide safe and economical solutions for fire design of composite beams.
25

Analýza časového vývoje vybraných parametrů požárů za období let 1977-2016 na území současné České republiky / Analysis of the time evolution of selected parameters of fires for the period 1977-2016 on the territory of the present Czech Republic

HRNČÍŘ, Miroslav January 2019 (has links)
The thesis deals with the fulfilment of the following objectives: Objective 1: System Analysis of emergency events associated with fire protection, the causes of fires and the link to the system environment. Objective 2: Examination of the homogeneity of the selected time period in terms of the survey of selected parameters (number of fires, damage, number of injured people, number of people killed). Objective 3: Examination of paired dependence of selected parameters (number of fires, damage, number of injured people, number of people killed). Objective 1 was fulfilled on the basis of the system analysis performed and evidenced on individual chapters of 1.1 to 1.7 of the theoretical part, which describe the examined problem as a system with structure and with links to the system surroundings and the system superior. Compliance with Objectives 2 and 3 was associated with the verification of the H1 hypothesis (and its sub-hypotheses H11, H12) and H2 hypothesis. The thesis explored the following hypotheses: Hypothesis H1: The selected fire parameters in the monitored period are statistically dependent. Due to the system analysis, this hypothesis was divided into two partial hypotheses: Hypothesis H11: Statistical dependence will be demonstrated for selected parameters in terms of time development. Hypothesis H12: Statistical dependence will be demonstrated for selected parameters from the viewpoint of paired bonds between the parameters. Hypothesis H2: The theoretical distribution of selected fire parameters is the normal distribution. The H11 hypothesis was accepted. In terms of time development, determination coefficients from 0.4234 to 0.8271 were found. Correlation coefficients from 0.65 to 0.91 corresponded to this. The values of all the examined parameters, i.e. "number of fires", "damage", "number of injured people", "number of people killed" increased with the time. The H12 hypothesis was accepted. The examined paired relationships correlated with values of 0.72, 0.80, 0.69 and 0.67. The global H1 hypothesis was adopted. Contrary to the H1 hypothesis, the H2 hypothesis was basically rejected - normality was proved only in one parameter ("number of people killed"), in the other three cases it would be necessary to look for another theoretical division. The rejection of the H2 hypothesis was supported by both acceptance of the H1 hypothesis and the detection of the inhomogeneity of the 1977-1991 period (some homogeneity emerged for the partial periods of 1977-1991 and 1992-2016). The benefits of the diploma thesis can be seen in theoretical part (justified application of mathematical statistics without scaling in time development, justified application of mathematical statistics with scaling in paired dependencies) as well as in the practical part (finding specific time and pair correlations). Based on the description of obtained results, the possible suggestions for follow-up work were described. To carry out partial investigation from the viewpoint of two identified partial periods with possible data homogeneity, to carry out an investigation with an extended number of parameters based on e.g. factor analysis.
26

Ferramentas eletrônicas: um caminho para a difusão da segurança contra incêndio / Electronic Tools: a way to diffuse the fire safety

Negrisolo, Walter 08 March 2007 (has links)
O trabalho apresenta as etapas e os trabalhos realizados para a construção de um sitio eletrônico como um caminho para a difusão da segurança contra incêndio. O sítio trata das normas do Corpo de Bombeiros de São Paulo, de sua Regulamentação, e se limitou aos casos tratados pelo Projeto Técnico Simplificado (PTS), os quais abrangem, resumidamente, edificações com piso mais elevado com até seis metros de altura e área construída até setecentos e cinqüenta metros quadrados. O objetivo desse sítio é o de permitir ao arquiteto, através sua navegação, obter todas as informações necessárias que o capacitem a cumprir essa regulamentação e legalizar essas edificações junto ao Corpo de Bombeiros de São Paulo. O texto apresenta um resumo histórico da evolução da legislação do Corpo de Bombeiros de São Paulo, descreve o Projeto Técnico Simplificado, com sua composição e impressos, consolida a regulamentação pertinente aos casos tratados por esse procedimento, desenvolve diagramas de bloco do fluxo das informações necessárias para a implantação do sítio, e relata os resultados de pesquisa de campo indicando sua necessidade, mais pesquisa de aperfeiçoamento do sítio, com duas versões: a primeira que buscou a coleta de sugestões e percepção de erros, e a segunda, conduzindo-o a busca de eficiência, eficácia e satisfação do usuário. Encontram-se presentes, nos diversos capítulos, todas as instruções iniciais orientadoras das pesquisas além da tabulação dos resultados obtidos. As conclusões indicam que o caminho percorrido conduziu à produção da ferramenta eletrônica desejada a qual, mesmo que ainda passível de aperfeiçoamentos, permite sua implantação imediata. / This work presents the stages and tasks carried through the construction of a web site as a way for the diffusion of the fire safety concepts. The web site deals with the norms of Saint Paul State Fire Department (SPFD) of its regulation, and was limited, itself, to the cases dealt by the Simplified Technical Project (STP), which enclose, briefly, construction with raised floor with up 6 meters high and construction area up to 750 square meters. The point of this web site is to allow architects through its navigation, to get all necessary information to enable them to fulfill the norms and legalize their construction with SPFD. The text presents a historical summary of the evolution of the SPFD legislation, describes the STP with his composition and printed matters, consolidate the pertinent regulation to the treated cases by this procedure, develops blocks diagrams of the flow of the necessary information for the implantation of the web site, also tells the results of the field research indicating its necessity, plus perfection research of the web site with two versions: the first one, that pursued the collect of suggestions and perceptions of errors, and the second one, leading to efficiency search, effectiveness and user satisfaction. There are in several chapters all the initial instructions that oriented the researches well as the tabulation of the gotten results. The conclusion indicate the covered way lead to the production of the desiderate electronic tool, witch, even still possible more development, allow its immediate implantation.
27

Avaliação da resistência ao fogo de tubulações de compostos vinílicos empregadas em sistemas prediais de chuveiros automáticos para extinção de incêndio. / Evaluation the fire resistance of the piping manufactured with vinyls compounds used in sprinklers systems.

Oliveira, Carlos Roberto Metzker de 10 September 2007 (has links)
Este trabalho estabelece critérios para avaliar a resistência ao fogo de tubulações fabricadas com compostos vinílicos, com diferentes teores de cloro, para os sistemas prediais de chuveiros automáticos, verificando o relacionamento entre os resultados obtidos nos ensaios realizados em trechos de tubulações pressurizados e submetidos a uma elevação de temperatura e os resultados observados nos ensaios realizados em tubulações em escala real exposta diretamente às chamas, simulando uma situação de incêndio. Assim, nos ensaios em trechos de tubulações ocorreu um aumento da resistência ao fogo proporcional ao aumento do teor de cloro dos compostos; nos ensaios em tubulações em escala real observou-se que corpos-deprova com tubos vinílicos grau a partir de 64 (grau este relacionado ao teor de cloro) suportam as condições de exposição ao fogo; a relação entre os ensaios mostrou que tubulações fabricadas com um composto vinílico com resistência a partir de 110 segundos de exposição ao fogo, no ensaio em trechos de tubulações, suportam também as condições estabelecidas no ensaio em escala real. Isto indicou a possibilidade de se utilizar o ensaio em trechos de tubulações para avaliar, preliminarmente, a capacidade dos materiais em resistir ao fogo, antes de serem submetidos ao ensaio em escala real, pois este apresenta maiores custos envolvidos e maiores dificuldades na sua execução. / This work establishes standards to evaluate the fire resistance of the piping manufactured with vinyl compounds, with different chlorine contents, for buildings sprinklers systems, verifying the relation amongst the results obtained with pressured small sections of piping and submitted to a temperature rise, and the results obtained from the real scale tests, simulating a fire situation with the samples in real scale were exposed to the flames. Therefore, in the small sections of piping tests an increase of the fire resistance proportional to the chlorine content of the compositions increases occurred; in the real scale tests observed that the piping with degree starting from 64 (degree related with to the chlorine contents) per cent supports the exposition to the flames; the relation between the tests showed that piping manufactured with vinyl compounds with fire resistance starting from 110 seconds of the small sections of piping tests, also supports the established conditions in the real scale tests. It was shown the possibility to employ the reduced scale test to evaluate, previously, the fire resistance of the materials previous to the real scale tests, which is more expensive and shows bigger difficulties to be done.
28

Development and Assessment of a Decision Support Framework for Enhancing the Forensic Analysis and Interpretation of Fire Patterns

Gorbett, Gregory Edward 07 August 2015 (has links)
"Fire investigators have historically relied upon fire damage as a means to conclude where a fire originated despite the lack of formal processes. The historical and current literature on the topic was evaluated with a specific emphasis toward the research conducted over the past eighty years related to fire patterns and their creation in the context of the fire environment. A seven step reasoning process for evaluating damage for determining the area of origin, along with a new definition for the term fire pattern, was developed. The aim was to develop and implement into practice a decision support framework that assists forensic fire investigators in assessing the efficacy of fire burn patterns as reliable indicators of the area of fire origin. This was facilitated by the development of a prototype method for determining the area of origin based on fire patterns analysis, named the Process for Origin Determination (POD). This dissertation describes the application of the POD with test subjects and presents an analysis of the outcomes showing its benefits. It has been shown through the use of reliability and validity tests that the POD assisted novices in more consistently and more accurately determining the area of origin over a variety of scenarios."
29

Barrier Performance Utilizing Normalized Heat Load as Part of an Engineering Based Building Fire Protection Analysis Method

Ferreira, Michael J. 04 November 2004 (has links)
"The objective of this thesis is to examine the methods of barrier analysis used in the Building Fire Safety Engineering Method (BFSEM), and to develop the areas of the analysis which currently rely almost exclusively on subjective judgment rather than quantitative measures. The use of the Normalized Heat Load to quantify heat energy impact on a barrier is examined in detail. Procedures are developed which apply the properties of a normal statistical distribution to barrier failures times, for use in simplifying the construction of barrier catalog curves. A framework is also developed to help standardize the selection of barrier effectiveness factors. Finally, this thesis outlines the procedure for developing barrier performance curves to allow easy implementation of the barrier analysis into the general framework of the BFSEM. A design example is presented to illustrate the analysis procedures."
30

Fire Effects on Suspension Bridge Main Cables: Methods for Determining Both Temperature and Strain Distributions Within an Exposed Cable

Sloane, Matthew Jake Deeble January 2017 (has links)
Fire resistance design and analysis is an under-studied and under-codified area of bridge engineering. With the lessening of conservatism in bridge design, the aging or our bridge infrastructure, and the increase in the ground transport of highly-flammable and -combustible materials, it is essential that the bridge engineering community better understand and incorporate methods for modeling the effects of fire on bridges. Typical fire resistance analysis looks at the response of individual structural components. Analysis for the component of a bridge is nowhere more important than for that of the main cables of suspension bridges. As such, we will survey and introduce the necessary analysis techniques to provide the bridge engineering community with the knowledge and tools to understand fire modeling and both rapidly and accurately assess their effects on suspension bridge main cables. The work of this dissertation is twofold. In the first portion, we address proper fire modeling techniques for bridge conditions and apply them in a sequential thermal-mechanical analysis of a three-dimensional model main cable with thermally-dependent material and mechanical properties. Although fire modeling has been addressed in a variety of scenarios, including extensive studies for building design and analysis as well as tunnel design and analysis, the types of fires, fire geometries, and air conditions associated with bridge fires vary drastically. Our work identifies the time to failure for our particular main cable example and subsequently compares both the temperature and strain distributions for temperature-dependent and temperature-independent models. Although the three-dimensional analysis is complete, we hope to emulate and expand on the work done in the building fire engineering community and bring to the literature methods to produce significant two-dimensional temperature distributions for when a main cable component is either partially or fully-exposed to fire. As such, the main fire modeling analyses mentioned in the previous paragraph lay the groundwork for our pursuit of closed-form analytical solutions necessary to rapidly and accurately assess the time-dependent temperature distribution within a cable cross-section exposed to fire. These solutions are formed with different approaches depending on the fire scenario in question. They include a separation of variables (eigenfunction) approach, sinusoidal transforms, Laplace transforms, Green's function solutions, and a semi-analytical hybrid method. We validate each of the approaches numerically using three different fire models.

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