Steel connection behaviour in frame and floor system at elevated temperature /Noraini Ajit
This thesis presents an analytical investigation on the influence of connection on the performance of steel frame structure and floor system under fire conditions. The connections are modeled through the use of Component Based Method. The implementation is undertaken within the advanced finite el...
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| Format: | Thesis |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://studentsrepo.um.edu.my/8815/7/THESIS_FINAL_NORAINI_1.pdf http://studentsrepo.um.edu.my/8815/ |
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| Summary: | This thesis presents an analytical investigation on the influence of connection on
the performance of steel frame structure and floor system under fire conditions. The
connections are modeled through the use of Component Based Method. The
implementation is undertaken within the advanced finite element program ADAPTIC,
which accounts for material and geometric nonlinearities. Data from a compartment
fire test of a four-storey composite building conducted in Gurun, Malaysia was adopted
for simulation studies. For steel sub-frame, experimental test based on Coimbra Fire
Test was used, which cover endplate connections under fire load. Based on the
developed and validated numerical model, parametric studies were performed in order
to identify parameters affected the performance of connection under elevated
temperatures. Several factors are put into consideration to investigate the influence of
connections as well as structural response due to temperature effect, geometric
consideration, influence of composite slab and load ratio. From the studies carried out,
it can be illustrated that the component based methods is one of the economical and
faster solutions to study the behaviour of connection at elevated temperature.
Comparison between the experimental and Component Based Method results shows that
the developed connection model has the capability to predict the resistance and
deformation capacity of semi-rigid connections under elevated temperatures with a
satisfactory degree of accuracy. It is important to consider the actual connections
configurations in assessing the overall structural response, so that in the beginning of
designing stage, designer can estimate the capability of overall structure to resist natural
fire accident. From the parametric studies, it can be illustrated that parameters related to
connections may influence the overall performance of structures. Further studies on the
ductility of connections at elevated temperatures are reviewed in order to identify the
limitation of rotation capacity of connections under fire. |
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