dc.contributor.author |
Burdzik, W.M.G.
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|
dc.contributor.author |
Skorpen, Sarah Anne
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|
dc.contributor.author |
Jansen van Rensburg, Karin
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|
dc.date.accessioned |
2014-07-04T06:08:18Z |
|
dc.date.available |
2014-07-04T06:08:18Z |
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dc.date.issued |
2014-03 |
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dc.description.abstract |
Recent roof failures in South Africa, of multiple ply nail plated trusses, have necessitated a rethink about the way in which timber trusses are analysed. The authors believe that the relative slip between plies caused by a torsional moment as a result of eccentric loading is a possible reason for some of the failures. The design assumption in South Africa and America is that all the plies share the applied load equally; Eurocode 5 (BS EN 1995-1-1:2004) does not cover the design of multiple ply trusses; and BS 5268-3:2006 recommends additional load factors to be applied to eccentrically loaded truss components with the outer ply being loaded more than the inner plies, as a result of the torsion induced by an out-of-plane eccentricity. In this paper, a matrix stiffness method is used to show that, by ignoring the eccentric loading and relative slip between the trusses, the member and plate force may be underestimated by a factor in excess of two for a three ply girder truss. A single three-ply girder truss test is used to illustrate the merits of the method. The required load factors calculated also show that the magnification factors in BS 5268-3:2006 are lower than they should be. |
en_US |
dc.description.librarian |
hb2014 |
en_US |
dc.description.uri |
http://www.icevirtuallibrary.com |
en_US |
dc.identifier.citation |
Burdzik, WMG, Skorpen, SA & Jansen van Rensburg, K 2014, 'Effects of slip on eccentrically loaded multiple-ply girder timber trusses', Proceedings of the ICE - Structures and Buildings, vol. 57, no. 3, pp. 68-71. |
en_US |
dc.identifier.issn |
0965-0911(print) |
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dc.identifier.issn |
1751-7702 (online) |
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dc.identifier.other |
10.1680/stbu.12.00034 |
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dc.identifier.uri |
http://hdl.handle.net/2263/40536 |
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dc.language.iso |
en |
en_US |
dc.publisher |
Institution of Civil Engineering |
en_US |
dc.rights |
ICE Publishing : All rights reserved |
en_US |
dc.subject |
Failures |
en_US |
dc.subject |
Strength and testing of materials |
en_US |
dc.subject |
Timber structures |
en_US |
dc.title |
Effects of slip on eccentrically loaded multiple-ply girder timber trusses |
en_US |
dc.type |
Postprint Article |
en_US |