Flexural strengthening of timber beams by traditional and innovative techniques
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Maria Rosa Valluzzi graduated with a degree in Civil Engineering from the University of Padova (Italy) and a PhD on ‘Design and preservation of structures’ from the University of Trieste (Italy) and is currently a researcher on Restoration at the University of Padova. An assistant professor teaching graduate and post-graduate courses, she is also involved in several research projects concerning the strengthening and repair of masonry buildings and structures, and the preservation of the cultural heritage in seismic areas. She is the author and co-author of more than 150 publications, is a member of national and international committees for standardisation (UNI, RILEM), and was awarded the Robert L’Hermite medal by RILEM in 2005.
Enrico Garbin graduated with a degree in Architectural Engineering from the University of Padova and is currently enrolled in a PhD course in ‘Modelling conservation and control of materials and structures’ at the University of Trento (Italy). He is the author and co-author of 30 papers and his research topics include the structural behaviour of historical masonry constructions and timber components, characterisations of new masonry systems, and numerical modelling.
Claudio Modena is a full professor of Structural Engineering at the University of Padova and is Director of post-graduate courses and of the Laboratory of Materials Testing of the Department of Structural and Transportation Engineering. He is the author of over 300 publications and is a member of national and international scientific organisations and technical commissions for standardisation (UNI, ISO, RILEM, CEN, JCSS, EAEE, ICOMOS). He is interested in construction analysis and design with particular focus on historical and monumental masonry structures, strengthening/ retrofitting in seismic areas, monitoring, retrofitting of arch bridges, and safety evaluations, is an expert on restoration and conservation of historic masonry and monuments, and is responsible for several research projects and R&D contracts with industry. He maintains a balance between academic and practical experience, combining research work and technical consulting to mutual benefit. Correspondence: Maria Rosa Valluzzi, DAUR, University of Padova, Via Marzolo 9, Padova 35131, Italy; Tel/Fax: + 39 049 8275576; E-mail: [email protected]
Abstract This work presents experimental analyses for validating various strengthening techniques applied to historic timber floors using traditional and/or innovative materials (FRP, fibre reinforced polymer). The traditional method proposed here consists of placing reinforcing planks above the existing floor beams and fixing them with ‘dry’ connections by means of wooden dowels. As an innovative technique, strengthening with wet lay-up carbon FRP laminates (CFRP) applied at the underside of the beams is examined, both as unique strengthening for floor beams and in combination with the above-mentioned traditional method on the composite structure. Results on the characterisation of the connections between materials (‘dry’ woo
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