Strengthening Requirements of Old, Timber Warren Trusses
Publication: Journal of Performance of Constructed Facilities
Volume 10, Issue 3
Abstract
A parametric analysis is carried out to study the strengthening requirements of old, timber Warren-truss hangars that the Department of National Defence (DND) of Canada owns and operates. These two-span Warren-truss buildings were constructed in the 1940s and were originally designed as two independent single-span trusses. Load-reversal behavior of a two-span truss system is investigated. Truss members that are overstressed under actual and realistic loading conditions are determined. The general objective of the present study is to ensure that existing timber Warren-truss buildings meet the latest Building Code requirements as well as DND guidelines. Results reveal that more members than that required by the guidelines need to be reinforced to provide proper resistance against specified loads, as outlined in the guidelines and current Building Code.
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References
1.
Canadian Standards Association. (1989). “Engineering design in wood (limit states design).”CSA Standard CAN/CSA-086.1-M89, Ottawa, Ontario, Canada.
2.
Department of National Defence of Canada. (1988). “34 m span Warren type trusses and columns: Maintenance.”C-98-006-002/TP-002, (formerly CETO 6-2-2b, 1967), Ottawa, Ontario, Canada.
3.
Department of National Defence of Canada. (1992). “Engineering study: Warren truss study—hangars 1 and 2 CFB Calgary.”90-CEU-13, Ottawa, Ontario, Canada.
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Ebeling, D. W.(1990). “Repair and rehabilitation of heavy timber trusses.”J. Perf. Constr. Fac., ASCE, 4(4), 242–258.
5.
Foo, H. C., Li, W. C., and Akhras, G. (1993). “Behavior of a double parallel chord Warren truss at the central column.”Military Engrg. Res. Group Rep., Royal Military Coll. of Canada, Kingston, Ontario, Canada, 1–19.
6.
Foo, H. C., and Akhras, G.(1994). “Prototype object-oriented system for maintenance of timber trusses.”J. Comp. in Civ. Engrg., ASCE, 8(3), 326–344.
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Muntz, E. P. (1946). “Prestressed reinforcement of timber trusses.”J. Engrg. Inst. of Canada, Toronto, Ontario, Canada, 567–572.
8.
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9.
Seckin, M., and Foo, H. C.(1987). “Repaired timber Warren trusses: Load carrying capacity study.”Engrg. Digest, Engrg. Inst. of Canada, Toronto, Ontario, Canada, 33(9), 30–33.
Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 10 • Issue 3 • August 1996
Pages: 127 - 134
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Aug 1, 1996
Published in print: Aug 1996
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