- Author
-
Wade, C. A.
- Title
- Fire Engineering Design of Reinforced and Prestressed Concrete Elements. Study Report.
- Coporate
- Building Research Association of New Zealand, Judgeford
- Report
-
BRANZ Study Report SR33,
January 1991,
69 p.
- Keywords
-
reinforced concretes
|
prestressed concretes
|
codes
|
building construction
|
floors
|
mathematical models
|
standards
|
steels
|
walls
- Identifiers
- beams; codes of practice; columns; fire properties
- Abstract
- Advances in knowledge relating to fire engineering design of concrete structures have led to the development of rational design methods as an alternative for time-consuming and expensive full scale fire testing or the use of simple tabulated forms of fire resistance data. Rational design methods are also better able to accommodate the effects of continuity and restraint, and the location of reinforcing or prestressing steel can be optimised, particularly for prestressed construction where prestressing steel rapidly loses strength at high temperature and elements tend to be more slender. However, rational design methods are unlikely to be warranted where the required fire resistance is less than about two hours for reinforced concrete and about one hour for precast prestressed concrete. This report summarises the existing state of knowledge and discusses possible design procedures ranging from selecting an appropriate design fire, to predicting the thermal and structural response of the member. Recommendations are also made supporting a review of existing New Zealand tabular forms of fire resistance data contained in MP89 for designing concrete structural elements.