Problems Relating to Assessment, Repair and Restoration of Wooden Roof Structures in Historic Buildings, as Exemplified by Two Case Studies in Southern Poland

Abstract:

The paper deals with problems relating to the assessment, repair and restoration of wooden roof structures in historic buildings. The roofs in two historic buildings located in southern Poland are the subject of this study. Their long use, the lack of proper maintenance, the merely local repairs and replacement of individual elements necessitated urgent repair and restoration measures. Some of the damage had gone unnoticed during routine surveys. All the factors which contributed to the degradation of the roof structures and created a hazard of their collapse are examined. The results of static analyses and calculations of the damaged structures are presented and the ways of strengthening and restoring them are described.

• Periodical: Advanced Materials Research (Volume 778)
• Pages: 888-894
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.778.888
• Online since: September 2013
• Authors: Dariusz Bajno, Łukasz Bednarz, Tomasz Nowak
• Keywords: Drilling Resistance, Heritage Building, Rehabilitation, Roof, Strengthening, Wood

References

[1] M. Piazza, M. Riggio, Visual strength-grading and NDT of timber in traditional structures, J. Build. Apprais. 3 (2008) 267-296.

DOI: 10.1057/jba.2008.4

[2] J. Jasieńko, T.P. Nowak, Ł. Bednarz, The Baroque Structural Ceiling over the Leopoldinum Auditorium in Wrocław University - tests, conservation and a strengthening concept. Int. J. Archit. Herit. (2012)DOI: 10. 1080/15583058. 2012. 692848.

DOI: 10.1080/15583058.2012.692848

[3] J. Jasieńko, T. Nowak, Ł. Bednarz, Wrocław University's Leopoldinum Auditorium - Tests of Its Ceiling and a Conservation and Strengthening Concept, Adv. Mat. Res. 133-134 (2010) 265-270.

DOI: 10.4028/www.scientific.net/amr.133-134.265

[4] Polish Standard PN-EN 1995-1-1: 2010. Eurocode 5: Design of timber structures - Part 1-1: General Common rules and rules for buildings [in Polish].

DOI: 10.3403/03174906

[5] J. Brol, S. Dawczyński, A. Malczyk, K. Adamczyk, Testing timber beams after 130 years of utilization, in: J. Jasieńko (eds. ), Proc. of the International Conference on Structural Analysis of Historical Constructions, SAHC 2012, Wroclaw, Poland, 15-17 October 2012, pp.644-650.

[6] Polish Standard PN-EN 408: 2004. Timber structures. Structural timber and glued laminated timber. Determination of some physical and mechanical properties [in Polish].

DOI: 10.3403/30159970

[7] J. Jasieńko, Ł. Bednarz, T. Nowak., Analysis of the condition of preservation of wooden ceilings in the Leopoldinum Assembly Hall at Wroclaw University and in the building of the main railway station in Wroclaw, Wiadomości Konserwatorskie (Conservation News) 26 (2009).

[8] J. Jasieńko, Ł. Bednarz, L. Engel, T. Nowak, Analysis of the static behaviour of the structural members of the wooden ceilings in the Polish State Railways Station, building B [in Polish], Report of the Institute of Building Engineering at Wrocław University of Technology, 2009, Series SPR, No. 27. [in Polish].

[9] T.P. Nowak, J. Jasieńko, D. Czepiżak, Experimental tests and numerical analysis of historic bent timber elements reinforced with CFRP strips, Constr. Build. Mater. 40 (2013) 197-206.

DOI: 10.1016/j.conbuildmat.2012.09.106

[10] M.A. Parisi, M. Piazza, Restoration and strengthening of timber structures: principles, criteria and examples, Pract. Period. Struct. Des. Const. 12 (2007) 177-185.

DOI: 10.1061/(asce)1084-0680(2007)12:4(177)