Effect of Fire on Epoxy‐Repaired Timber
Publication: Journal of Structural Engineering
Volume 110, Issue 12
Abstract
The use of epoxy repair for timber structures has proved to be both structurally efficient and economical. However, little information is available on the behavior of epoxy‐repaired timber during a fire. To evaluate this behavior for repaired truss joints, an experimental and theoretical investigation was conducted. The approach used was to: (1) Experimentally determine the epoxy‐to‐wood bond strength on small shear block specimens over a wide range of temperatures; (2) experimentally determine the time required for full sized epoxy‐repaired joints to fail when subjected to a sudden elevated temperature; and (3) develop a mathematical model which predicts the strength and duration of load for joints exposed to a sudden high heat condition. Based on a correlation of theoretical to experimental results, the theory was then utilized to obtain an approximate fire rating curve for epoxy‐repaired joints with glue lines at various distances from the exposed surface. A 30 min fire rating was obtained with the glue line at 3 in. from the surface and a 60 min rating was obtained with a glue line at 4 in. from the surface.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 110 • Issue 12 • December 1984
Pages: 2858 - 2875
Copyright
Copyright © 1984 ASCE.
History
Published online: Dec 1, 1984
Published in print: Dec 1984
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