Title:
Materials Dominated Aspects of Design for Structural Fire Resistance of Concrete Structures
Author(s):
John W. Dougill
Publication:
Symposium Paper
Volume:
80
Issue:
Appears on pages(s):
151-176
Keywords:
concrete slabs; continuous beams; fire resistance; pore
water pressure; reinforced concrete; spalling; structural design;
thermal expansion; thermal stresses.
DOI:
10.14359/6588
Date:
7/1/1983
Abstract:
The behaviour of concrete and reinforced concrete are examined in the context of rational design for fire resistance. Links with plasticity theory are noted together with the requirements for ductility in Structures designed using these concepts. It is concluded that current methods of rational design are most applicable when structural behaviour is determined by the action of the steel in tension at high temperatures. In considering the limitations of the method, doubts are expressed on extensions to compression loading and shear where the problems of detailing the reinforcement for adequate ductility are more difficult. The problem of local failure by spalling is also considered with different mechanisms being identified and results presented for pore pressures developed during heating. The paper concludes with a pragmatic philosophy for design in which a defensive view of bond, local damage and compression failure is to be adopted within an overall framework of rational design and knowledge from full scale tests.