Fire Imposed Heat Fluxes for Structural Analysis
dc.contributor.advisor
Torero, Jose L
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dc.contributor.advisor
Usmani, Asif
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dc.contributor.advisor
Lane, Barbara (Arup)
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dc.contributor.author
Jowsey, Allan
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dc.date.accessioned
2006-12-20T13:45:31Z
dc.date.available
2006-12-20T13:45:31Z
dc.date.issued
2006-12
dc.description.abstract
The last two decades have seen new insights, data and analytical methods
to establish the behaviour of structures in fire. These methods have slowly
migrated into practice and now form the basis for modern quantitative
structural fire engineering.
This study presents a novel methodology for determining the imposed heat
fluxes on structural members. To properly characterise the temperature rise of the structural elements, a post-processing model for computational
fluid dynamics tools was developed to establish the heat fluxes imposed on
all surfaces by a fire. This model acts as a tool for any computational
fluid dynamics model and works on the basis of well resolved local gas
conditions. Analysis of the smoke layer and products of combustion allow
for heat fluxes to be defined based on smoke absorption coefficients and
temperatures. These heat fluxes are defined at all points on the structure
by considering full spatial and temporal distributions. Furthermore, heat
fluxes are defined by considering directionality and both characteristic
length and time scales in fires. Length scales are evaluated for different
structural member geometries, while time scales are evaluated for different
structural materials including applied fire protection. It is the output
given by this model that provides the input for the thermal analysis of the
structural members that is a necessary step prior to the structural analysis
to be undertaken. The model is validated against the experimental results of the previously
mentioned large scale fire tests, showing good agreement. In addition,
comparisons are made to current methods to highlight their potential
inadequacies.
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3832392 bytes
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dc.format.mimetype
application/pdf
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dc.identifier.uri
http://hdl.handle.net/1842/1480
dc.language.iso
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dc.publisher
The University of Edinburgh. College of Science and Engineering. School of Engineering and Electronics
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dc.subject.other
world trade centre
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dc.subject.other
collapse
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dc.subject.other
fire
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dc.subject.other
heat flux
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dc.subject.other
design
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dc.subject.other
arup
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dc.subject.other
edinburgh
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dc.subject.other
structures
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dc.subject.other
built
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dc.subject.other
smoke
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dc.subject.other
numerical model
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computational model
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dc.subject.other
methodology
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dc.subject.other
experiments
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dc.subject.other
dalmarnock
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dc.subject.other
cardington
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dc.title
Fire Imposed Heat Fluxes for Structural Analysis
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dc.type
Thesis or Dissertation
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dc.type.qualificationlevel
Doctoral
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dc.type.qualificationname
PhD Doctor of Philosophy
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