Comparison of In Situ and Laboratory Testing for the Characterization of Old Timber Beams before and after Intervention

Abstract:

In this paper an investigation campaign, carried out in occasion of the restoration of a timber floor in the Belasi Castle (Trentino, Italy), is reported. In order to validate a testing procedure for the calibration and control of an innovative wood-wood strengthening technique, results of tests performed in situ on the structural elements, in both the original and the repaired condition, have been compared with those obtained in laboratory on some dismantled beams. For the characterization of the material decay, both local mechanical and global vibrational testing have been carried out. For the mechanical characterization of the beams, before and after repair, direct static bending tests have been performed, with distributed loads, on site, and according to standard four-points loading schemes, in laboratory.

• Periodical: Advanced Materials Research (Volumes 133-134)
• Pages: 1101-1106
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.133-134.1101
• Online since: October 2010
• Authors: Maurizio Piazza, Mariapaola Riggio, Roberto Tomasi, Ivan Giongo
• Keywords: Strengthening Calibration, Strengthening Control, Wood-Wood Strengthening Technique

References

[1] Camplani, M, Cannas, B, Carcangiu, S, Concu, G, Fanni, A, Montisci, A, and Mulas, ML (2008). Acoustic tomography for non destructive testing of stone masonry., in: Lecture notes in Computer Science. 5073: 596-605. Springer Berlin/Heidelberg.

DOI: 10.1007/978-3-540-69848-7_48

[2] Crosatti, A, Piazza, M, Tomasi, R, and Angeli, A (2009). Refurbishment of traditional timber floor with inclined screw connectors., in: Proc. prohitech09, 1st Int. Conf. Rome, 21-24. 12. (2009).

[3] EN 1194 (1999). Timber structures. Glued laminated timber. Strength classes and determination of characteristic values. European Committee for Standardization. Brussels.

DOI: 10.3403/01544431

[4] EN 13183-2 (2002). Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance method. European Committee for Standardization. Brussels.

DOI: 10.3403/02561842u

[5] ICOMOS (2001). Recommendations for the analysis, conservation and structural restoration of architectural heritage. [Online]. Available: http: /www. internation. icomos. org/charters/struc.

[6] Piazza, M, Riggio, M, Tomasi, R, and Angeli, A (2009).

[7] Solli, KH (2000). Modulus of elasticity - local or global values., in: Proc. of World Conference on Timber Engineering, Whistler Resort, British Columbia, Canada, July 31 - August 3, 2000 Tures_e. pdf.

[8] Turrini, G., and Piazza, M. (1983). Il comportamento statico della struttura mista legno calcestruzzo, in Recuperare: 6.

[9] UNI 11035-1 (2003). Structural timber. Visual strength grading: terminology and measurement of features. UNI Milano.

[10] UNI 11035-2 (2003). Structural timber. Visual strength grading rules and characteristic values for Italian structural timber population. UNI Milano.

[11] UNI 11118 (2004). Cultural heritage - Wooden artefacts - Criteria for the identification of the wood species. UNI Milano.

[12] UNI 11119 (2004). Cultural Heritage - Wooden artifacts - Load-bearing structures - On site inspections for the diagnosis of timber members. UNI Milano.

[13] UNI 11138 (2004). Cultural heritage - Wooden artefacts - Building load bearing structures - Criteria for the preliminary evaluation, the design and the execution of works., UNI Milano.

[14] UNI EN 408 (2004). Timber structures. Structural timber and glued laminated timber. Determination of some physical and mechanical properties. UNI Milano.

DOI: 10.3403/30159970