ORIGINAL ARTICLE
Comparison of Actual Deformations of Historic Wooden Structures with Values Obtained from Static Calculations
1
Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, Białystok, Poland
2
Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
Submission date: 2024-09-02
Final revision date: 2024-10-06
Acceptance date: 2024-10-08
Online publication date: 2024-10-21
Publication date: 2024-10-21
Corresponding author
Kamil Zimiński
Wydział Budownictwa i nauk o Środowisku, Politechnika Białostocka, ul. Wiejska 45E, 15-351, Białystok, Poland
Wydział Budownictwa i nauk o Środowisku, Politechnika Białostocka, ul. Wiejska 45E, 15-351, Białystok, Poland
Civil and Environmental Engineering Reports 2024;34(4):138-149
KEYWORDS
wooden structuresnon-destructive testinglaser scanningold timberold woodold timber structuresagaing effectmechanical properties assessmenttimber creep
TOPICS
ABSTRACT
In historic wooden structures, deformations can be influenced by factors that are negligible within the first 50 years of the building's existence. In attics where the roof covering is made of metal sheets, the air and structural elements heat up during the day and cool down rapidly at night. This phenomenon, over a long period, can cause micro-cracks and surface material degradation. For the study, historic buildings meeting the criteria for service class II according to PN-EN 1995-1-1 were selected. Measurements of deflections, humidity, and modulus of elasticity of the wood were conducted. The actual deflections of the examined structures were found to be 28% to 37% higher than those obtained from numerical calculations, indicating ongoing rheological processes in the wooden structures.
REFERENCES (32)
1.
Kozakiewicz, P and Matejak, M 2013. Klimat a drewno zabytkowe dawna i współczesna wiedza o drewnie [Climate and antique wood: old and modern knowledge about wood]. Warszawa : Wydawnictwo SGGW.
2.
Xin Z, Fu R, Zong Y, Ke D, Zhang H, Yu, Y and Zhang, W 2022. Effects of natural ageing on macroscopic physical and mechanical properties, chemical components and microscopic cell wall structure of ancient timber members. Construction and Building Materials 359, 129476.
3.
Kránitz, K 2014. Effect of natural aging on wood, Doctoral Thesis, MSc. Wood Technology, University of West Hungary.
4.
Cavalli, A, Cibecchini, D, Togni, M, Hélder, S and Sousa, HS 2016. A review on the mechanical properties of aged wood and salvaged timber. Construction and Building Materials, Volume 114, 681-687.
5.
Cavalli, A, Bevilacqua, L, Capecchi, G, Cibecchini, D, Fioravanti, M, Goli, G, Togni, M and Uzielli, L 2016. MOE and MOR assessment of in service and dismantled old structural timber. Engineering Structures 125, 294–299.
6.
Froidevaux, J, Volkmer T, Ganne-Chédeville C, Gril, J and Navi, P 2012. Viscoelastic behaviour of aged and non-aged spruce wood in the radial direction. Wood Material Science & Engineering 7 (1):1–12.
7.
Kawai, S, Misao, Y, Miyuki, M and Junji, S 2008. Research on the aging of wood in RISH. Wood science for preservation of cultural heritage Braga 2008, Italy: Firenze University Press, 52–56.
8.
Nocetti, M, Aminti, G, Vicario, M and Brunetti, M. 2024. Mechanical properties of ancient wood structural elements assessed by visual and machine strength grading. Construction and Building Materials Volume 411, 134418.
9.
Midek, U 2016. Analiza drewna w obiektach zabytkowych na podstawie badań wytrzymałościowych [Analysis of wood in historic buildings based on strength tests]. Roczniki Inżynierii Budowlanej – Zeszyt 16/2016, Komisja Inżynierii Budowlanej Oddział Polskiej Akademii Nauk w Katowicach.
10.
Mączyński, D 2020. Konstrukcyjne drewno zabytkowe – rozszerzone metody badań na przykładzie dawnych więźb dachowych [Structural historic timber – extended research methods based on the example of old roof trusses]. Ochrona dziedzictwa kulturowego 9. 10.35784/odk.1291.
11.
Brol, J, Dawczyński, S, Malczyk, A and Adamczyk, K 2012. Testing timber beams after 130 years of utilization. Wiadomości Konserwatorskie Nr 32 (32), 100–04.
12.
Brol, J and Wdowiak-Postulak A, 2019. 24. Old timber reinforcement with FRPs. Materials 12 (24):4197.
13.
Schänzlin, J 2010. Modeling the long-term behavior of structural timber for typical serviceclass-II-conditions in South-West Germany. Habilitation, Universität Stuttgart Institut fur Konstruktion und Entwurf.
14.
PN-EN 1995-1-1:2010 Eurokod 5: Projektowanie Konstrukcji Drewnianych - Część 1-1: Postanowienia Ogólne – Reguły Ogólne i Reguły Dotyczące Budynków.
15.
Dieringer, F 2007. Dachsanierung des Kapellenbaus am Schloss Nymphenburg. Diploma thesis, HTWG Konstanz.
16.
Luhr, A 2007. Dachtragwerk der Munsterbauhutte Freiburg. Bachelor-thesis, HTWG Konstanz.
17.
Muszynski, L, Lagana, RS and Shaler, M 2004. Characterization of hygro-mechanical properties of solid wood on the material level. 8th World Conference on Timber Engineering, WCTE 2004, June 14-17, Lahti, Finland, volume 2, pages 161–166.
18.
Toratti, T 1992. Creep of Timber Beams in Variable Environment. PhD thesis, Helsinki: University of Technology.
19.
Reichel, S and Kaliske, M 2015. Hygro-mechanically coupled modelling of creep in wooden structures, Part I: Mechanics, International Journal of Solids and Structures 77, 28–44.
20.
Reichel, S and Kaliske, M 2015. Hygro-mechanically coupled modelling of creep in wooden structures, Part II: Influence of moisture content, International Journal of Solids and Structures 77, 45–64.
21.
Angellier, N, Dubois, F, Moutou Pitti, R, Diakhaté, M and Spero Adjovi Loko, R 2017. Influence of hygrothermal effects in the fracture proces in wood under creep loading. Engineering Fracture Mechanics 177 (2017) 153–166.
22.
Florisson, S, Muszynski, L and Shaler, SM 2021. Analysis of hygro-mechanical behavior of wood in bending. Wood and Fiber Science, 53(1), 27-47.
23.
Zielony, R and Kliczkowska, A 2012. Regionalizacja przyrodniczo-leśna Polski 2010. Centrum Informacyjne Lasów Państwowych.
24.
Łapka, M 2013. Wpływ efektu skali na mechanikę zniszczenia drewna konstrukcyjnego [The influence of scale effect on the mechanics of structural timber failure]. PhD-thesis, Opole.
26.
Hanhijarvi, A 1995. Modelling of creep deformation mechanisms in wood. PhD-thesis, Helsinki University of Technology. Technical Research Centre of Finland. VTT Publications.
27.
Toratti, T 1992. Creep of timber beams in variable environment. PhD-thesis, Helsinki University of Technology, Laboratory of Structural Enginieering and Building Physics.
28.
Saad, K, Pintér, E and Lengyel, A 2024. Comparative Study on Complete Characterisation of Elastic–Ductile Compressive Behaviour of Aged and New Norway Spruce Timber. International Journal of Architectural Heritage, January 2024, 1-11.
29.
Gutenkunst, M 2008. Bestimmung von effektiven Kriechbeiwerten durch Messungen an bestehenden Bauwerken. Bachelor-thesis, HTWG Konstanz.
30.
Granello, G and Palermo, A 2019. Creep in timber: research overview and comparison between code provisions. New Zealand timber Design Journal 27(1), 6-22.
31.
Zheng X, Li Z, Minjuan, He and Lam, F 2021. Experimental investigation on the rheological behavior of timber in longitudinal and transverse compression, Construction and Building Materials 304, 124633.
32.
Huang, Y 2016. Creep behavior of wood under cyclic moisture changes: interaction between load effect and moisture effect. Journal of Wood Science 62, 392–399.
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