- Author
-
Olesen, F. B.
|
Konig, J.
- Title
- Tests on Glued Laminated Beams in Bending Exposed to Natural Fires.
- Coporate
- Aalborg Univ., Sweden
Swedish Institute for Wood Technology Research, Stockholm, Sweden
- Book or Conf
- CIB-W18 Meeting 25. August 1992,
Ahus, Sweden,
1992
- Keywords
-
beams
|
laminates
|
bending
|
fire tests
|
temperature measurements
- Identifiers
- static loading
- Abstract
- A series of fire tests with so-called natural fire exposure of loaded glued laminated beams was performed. The fire exposure on three sides during the tests was governed by a temperature-time relationship determined acording to an energy balance method (opening factor method) with different fire load densities and opening factors. The results confirmed the rate of charring on the wide side of the member obtained by Hadvig. The average charring depth on the lower side of the member was greater than the average charring depth on the wide side when the width of the lower side was smaller than about 180 mm. Considering the mechanical behavior, the tests showed that a loss of strength and stiffness of the residual cross section occured, and that it continued through the cooling period, caused by continous heat flow to the inner parts of the cross section.