Repairing of a timber truss through two different techniques using timber elements and screwed metal plates
2015 (English)In: Proceedings of the 2nd International Conference on Historic Earthquake-Resistant Timber Frames in the Mediterranean Region: H.Ea.R.T.2015, December 2 - 4, 2015, LNEC, Portugal, 2015Conference paper (Refereed)
Structural reinforcement of timber buildings may be needed due to different reasons such as change of use, deterioration, lack of maintenance, exceptional damaging incidents or loading, to comply with regulatory changes and being retrofitted, or interventions to increase structural resistance.In this work, two different techniques were considered for repair of a timber truss, subjected only to vertical loads, that was previously assessed on laboratory (test facilities of University of Minho) and taken up to failure during a load-carrying test. A collar beam truss, with more than one hundred years, was tested carrying a vertical point load on each main rafter. Failure of the timber truss was located in the sections of the rafters near the loading positions by bending.Repairing techniques, based on the use of timber elements for one of the rafters and on screwed metal plates for the other rafter, were evaluated and compared to the original unstrengthened condition. The efficiency of the combined repairing techniques was evaluated taking into consideration the structural performance of the collar truss, namely its displacement and ultimate load capacity.In this paper, the results of the experimental tests are discussed attending to the analytical calculation of the contribution of the repairing techniques. Also, the different failure scenarios, for original and strengthened truss, were analyzed and compared.
Place, publisher, year, edition, pages
Research subject Wood Technology
IdentifiersURN: urn:nbn:se:ltu:diva-38445Local ID: cda7e3a3-904d-49f6-9bdb-cb81182f3535OAI: oai:DiVA.org:ltu-38445DiVA: diva2:1011946
International Conference on Historic Earthquake-Resistant Timber Frames in the Mediterranean Region : 02/12/2015 - 04/12/2015
Godkänd; 2015; 20151201 (nicbjo)2016-10-032016-10-03Bibliographically approved