3RD INTERNATIONAL CONGRESS ON TECHNOLOGY - ENGINEERING & SCIENCE - Kuala Lumpur - Malaysia (2017-02-09)

Temperature Distribution Analysis Of Cellular Steel Beams (csbs) At Elevated Temperature

Any structural steel building around the world are highly risked to fire exposure during any fire occurrence mishap. To mitigate fire exposure from spreading the other structural steel element or adjacent structural building, fire protection systems needs to be install or insulated for the structural element. Structural steel beams are one of the key structural element that may risk to fire exposure due to its location on top of ceiling floor. Cellular steel beams (CSBs) is the most commonly uses than naked solid steel beams due to its several superiority. However, the strength and stiffness evaluation of the CSBs needs to be prioritize in terms of temperature distribution in the beams. It is already known that the steel stiffness subdue simultaneously with the temperature rise from fire exposure. With the introduction of the web opening section along the beams, further stiffness drop can be forecast. The aim of this research is to investigate and validate the temperature development of cellular steel beams (CSBs) when expose to elevated temperature. Performance based approach will be use to predict the temperature development of CSBs when expose to fire in comparison with the conservative approach of prescriptive based approach. Prescriptive based approach is the simplest way in designing the fire protection systems of CSBs which can be extracted from the Eurocodes. However, there are constraints when applying the latter due to its uniformity of fire boundary conditions which is not happening in real fire event. Two isolated cellular steel beams (CSBs) will be selected from the available experimental investigations to consolidate the main objective of this research. Two types of fire exposure will be use the analysis, namely slow fire curve and standard fire curve of ISO834. First stage analysis will be validated when applying slow fire curve to the CSBs. Second stage analysis involving parametric study of using deferent fire types of fire exposure, namely standard fire curve of ISO834. Finite element method of general purpose ABAQUS will be use to simulate both beams sample and hence to validate the experimental investigation that has been done in the literature. It is crucial to determine or predicting parts of the CSBs exhibit the coolest and highest temperature prediction when expose to elevated temperatures. Once validated, future works can be geared up with the introduction of fire protection systems, namely intumescent coating to be insulated with the CSBs. Intumescent coating helps to reduce the temperature rise in steel element and subsequently reduce any vertical deformation if static loads action were employ on top of the CSBs.
Fariz Aswan Ahmad Zakwan, Renga Rao Krishnamoorthy, Azmi Ibrahim, Abdul Manaff Mohd. Ismail