ISSUES OF DETERMINING THE RESOURCE OF BEARING CAPACITY OF ANCIENT TIMBER STRUCTURES ELEMENTS

Ziqi Liu, Pavel Koval

Abstract


Introduction: The resource of bearing capacity (RBC) of timber structures in historical buildings and structures with an operational life of 100 years or more cannot be determined without considering their specific characteristics. At the same time, this problem has important theoretical and practical significance for assessing the technical condition, preservation, and restoration of cultural heritage sites. Objective: to systematize scientific data on the influence of various factors on the RBC of ancient timber structure elements. Methods: The operational bearing capacity of timber structure elements is mainly determined by the thermofluctuation mechanism of cellulose macromolecule (“skeleton” of wood) failure, which leads to strength degradation, creep, as well as physical wear. Assessing the combined effect of these factors allows determining the RBC of the structure. Furthermore, with long service lives, it is necessary to additionally consider possible changes: climate, landscape, properties of protective-decorative coatings, structural and spatial-planning solutions, spatial position, functional purpose, status of the object as a monument, as well as the legislative framework for design and restoration. A refined assessment should include an analysis of the influence of construction technological features. Results: A comprehensive analysis has demonstrated the need for joint consideration and interrelations of force and environmental impacts, deformation and strength properties of wood, physical wear and defects, and the complex nature of the stressstrain state of timber structure elements in historical buildings and structures to assess their RBC, as well as to develop a strategy for ensuring a balance between mechanical safety and the preservation of the cultural and historical value of the objects.

Keywords


resource of bearing capacity; ancient timber structures; long-term strength; physical wear; geometric nonlinearity; physical nonlinearity

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References


Bode, A. B., Zinina, O. A., Kosenkov, A. Yu., and Popov, V. A. (2019). Traditional Timber Construction and Carpentry Craftsmanship. Moscow: Institute of Heritage.

Borovikov, A. M. and Ugolev, B. N. (1989). Handbook on Wood. Ed. by B.N. Ugolev. Moscow: Lesnaya Promyshlennost.

Brunetti, M., Nocetti, M., and Burato, P. (2013). Strength Properties of Chestnut Structural Timber with Wane. AMR, 778, pp. 377-384. DOI: 10.4028/www.scientific.net/AMR.778.377.

Cabaleiro, M. and Branco, J. M. (2018). First results on the combination of laser scanner and drilling resistance tests for the assessment of the geometrical condition of irregular cross-sections of timber beams. Materials and Structures, 51, article No 99. DOI: 10.1617/s11527-018-1225-9.

Cabaleiro, M. and Riveiro, B. (2016). Algorithm for the analysis of the geometric properties of cross-sections of timber beams with lack of material from LIDAR data. Materials and Structures, 49, pp. 4265–4278. DOI: 10.1617/s11527-015-0786-0.

Chernykh, A. G., Glukhikh, V. N., and Koval, P. S. (2023). Comparative analysis of the results of determining the longterm strength of wood and LVL by the accelerated method under compression along the fibers. Eurasian Science Bulletin, 6 (15), 60SAVN623.

Glebov, I. T. (2018). Physics of Wood: Textbook. Yekaterinburg: Ural State Forest Engineering University (UGLTU). Gubenko, L. A. and Khandov, M. G. (2015). Definition of the Strength Assessment of the Extension of Wooden Elements with Knots. Lesnoy Zhurnal, 1(343), pp. 103–107. DOI: 10.17238/issn0536-1036.2015.1.103.

Gushchina, V. A., Gushchin, B. A., and Melnikov, I. V. (2014). Documents and Materials on the History of the Kizhi Architectural Ensemble (1946–1979). Petrozavodsk: Karelian Research Centre of the Russian Academy of Sciences.

ICOMOS (1965). International Charter for the Conservation and Restoration of Monuments and Sites (The Venice Charter). Adopted by the International Congress of Architects and Technicians of Historic Monuments, Venice, 1964; ratified by ICOMOS, 1965.

Ivanov, Yu. M. (1972). Long-term strength of wood. Proceedings of Higher Educational Institutions. Forestry Journal, 4, pp. 76–82.

Kirichkov, I. V. (2020). Wooden Structures in Ancient Chinese Architecture. Siberian Federal University.

Kisternaya, M. V. (2000). Assessment of the condition of wood in architectural monuments. PhD Thesis. Moscow: Forest Institute of Karelian Research Centre of the Russian Academy of Sciences; supervised by B.N. Ugolev; advised by V.A. Kozlov.

Korolkov, D. I. (2020). Assessment of Residual Life and Service Life of LVL Beam Structures. Saint Petersburg: Saint Petersburg State University of Architecture and Civil Engineering (SPbGASU).

Koval, P. S. (2024). Accelerated method for determining the long-term strength of wood and wood-based materials. Bulletin of Civil Engineers, 6 (107), pp. 68–80. DOI: 10.23968/1999-5571-2024-21-6-68-80.

Koval, P. S. and Kushnir, A. E. (2024). Study of the long-term modulus of elasticity of LVL under short-term loads. Eurasian Science Bulletin, 16 (3), 90SAVN324.

Koval, P. S. and Trunina, Yu. V. (2024). Combined effect of moisture and temperature on the strength of LVL. Eurasian Science Bulletin, 16 (5), 24SAVN524.

Kovshov, A. G. (2020). Kinetic, thermofluctuation nature of fracture of solid friction surfaces during wear. Samara State Technical University. DOI: 10.37313/1990-5378-2020-22-3-37-43.

Lourenço, P. B., Sousa, H. S., Brites, R. D., and Neves, L. C. (2013). In situ measured cross section geometry of old timber structures and its influence on structural safety. Materials and Structures, 46 (7), pp. 1193–1208. DOI: 10.1617/s11527-012-9964-5.

Macchioni, N., Brunetti, M., and Pizzo, B. (2012). The timber structures in the Church of the Nativity in Bethlehem: Typologies and diagnosis. Journal of Cultural Heritage, 13, pp. e42-e53. DOI: 10.1016/j.culher.2012.10.004.

Nocetti, M., Aminti, G., Degl’Innocenti, M., and Brunetti, M. (2021). Geometric representation of the irregular cross-section of old timber elements: Comparison of different approaches for mechanical characterisation. Construction and Building Materials, 304, 124579, pp. 45–52. DOI: 10.1016/j.conbuildmat.2021.124579.

Osuna-Sequera, C., Llana, D. F., and Arriaga, F. (2020). The influence of cross-section variation on bending stiffness assessment in existing timber structures. Engineering Structures, 204, 110082. DOI: 10.1016/j.engstruct.2019.110082.

Papulova, I. E. (2014). Mechanical Properties and Testing of Wood: Textbook. Kirov: Vyatka State University (VyatGU).

Piazza, M. and Riggio, M. (2008). Visual strength-grading and NDT of timber in traditional structures. Journal of Building Appraisal, 3 (4), pp. 267–296. DOI: 10.1057/jba.2008.4.

Rentzhog, S. (2007). Open Air Museums: the History and Future of a Visionary Idea. Kristianstad: Jamtli Förlag & Carlsson Bokförlag.

Riggio, M., D’Ayala, D., Parisi, M. A., and Tardini, C. (2018). Assessment of heritage timber structures: Review of standards, guidelines and procedures. Journal of Cultural Heritage, pp. 220–235. DOI: 10.1016/j.culher.2017.11.007.

Samoilov, P. I. (1996) Creep of Wood. Siberian Federal University.

Tiunov, O. V. and Shashkin, A. G. (2020). Kizhi. Transfiguration. Saint Petersburg: Geo-reconstruction Institute Publishing House.

Vakin, A. T., Poluboyarinov, O. I., and Solovyev, V. A. (1980). Wood Defects. 2nd ed., revised and expanded. Moscow: Lesnaya Promyshlennost.

Varfolomeev, A. Yu. (2010). Damage accumulation in wooden structures during long-term operation under conditions of biological aggression. PhD Thesis. Moscow: Research Center “Stroitelstvo”, supervised by L.M. Kovalchuk.

Wang, S. (2005). Methods for Preservation and Relocation of Ancient Chinese Buildings. Beijing: China Architecture & Building Press.

Wang, X. (2008). Research on Residual Life Assessment Method of Historic Timber Structures Based on Reliability Theory. PhD Thesis. Wuhan University of Technology.

Yartsev, V. P. (2003). Influence of Tense Condition Type, Temperature and Liquid Media on the Limit of Long-Term Wood Resistance. Tambov State Technical University Bulletin, 9 (4), pp. 718–721.

Yartsev, V. P. and Kiseleva, O. A. (2009). Prediction of the Behavior of Building Materials under Adverse Operating Conditions: Textbook. Tambov: Tambov State Technical University.


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