Impact of Iron Clamps and Dowels on the Vulnerability of Ancient Masonry Walls

Year 2024, Volume: 28 Issue: 4, 844 - 854

Funda Gençer

https://doi.org/10.16984/saufenbilder.1464317

Abstract

Various masonry wall organization techniques were used in ancient Anatolian buildings depending on the local characteristics and the kind of stone used in the region. Traces of iron clamps or dowels can be seen on numerous ancient walls. This study's main goals are to ascertain the impact of iron clamps and dowels on the vulnerability of various ancient wall organizations in Anatolia and investigate potential relationships between wall organization types and clamp or dowel usage. Another study objective is to gather information about using metal connectors for restoration or anastylosis studies in archaeological sites.
First, a site analysis was performed on ancient cities to document various types of masonry. Four types of walls, namely isodomic, isodomic with header and stretcher, pseudo isodomic, and isodomic in alternation header and stretcher row were determined. Quasi-static tilt analysis was performed on 3D models of walls without clamps and dowels, with clamps, and with dowels to compare the failure mechanisms of the wall types.
As a result, the wall type with the highest strength gain when metal connectors were utilized in the analysis was isodomic organization, which also includes numerous traces of clamps and dowels in ancient cities. This indicates that knowledge was gained because of experiences against lateral loads at that time. This information is not only significant in terms of understanding the history of architecture but also provides data to reinforce ancient walls during conservation work.

Keywords

Ashlar masonry, Failure mechanisms, Metal connectors, Tilt analysis, Conservation

References

• Vitruvius, The Ten Books on Architecture, Translated by Morgan M. H. Cambridge: Harvard University Press, 1914.
• A. Orlandos, Les Matèriaux de Construction: Et la Technique Architecturale das Anciens Grecs, Paris: E. de Boccard, 1968.
• S. K. Nossov, Greek Fortifications of Asia Minor 500-130 BC: From the Persian Wars to the Roman Conquest, UK: Osprey Publishing, 2012.
• V. Ceradini, “Modellazione, Sperimentazione per lo Studio della Struttura Muraria Storica,” Ph.D. Dissertation, Department of Architecture, University of Rome, Rome, Italy, 1992.
• T. Saner, “Some Remarks on the Hellenistic Masonry Techniques in Asia Minor,” in Archéomatériaux Marbres et autres roches, Actes de la IV e Conférence internationale ASMOSIA IV, University of Bordeaux, France, 1995, pp. 347-350.
• L. Karlsson, “Fortification Towers and Masonry Techniques in the Hegemony of Syracuse, 405-211 B.C,” in Acta Instituti Romani Regni Sueciade, 40, XLIX, B. Alroth, Ed. Stockholm: Minab, 1992.
• S. Clarke, R. Englebach, Ancient Egyptian Masonry, London: Oxford, 1930.
• R. L. Scranton, Greek Walls, Cambridge: Harvard University Press, 1941.
• A. W. Lawrence, Greek Architecture. England: Penguin, 1957
• R. Martin, Living Architecture-Greek. London: Oldbourne, 1967.
• J. P. Adam, Roman Building, Materials, and Techniques, translated by Anthony Mathews, London, and New York: Routledge, 2005.
• R. Mark, Architectural Technology up to the Scientific Revolution. The Art and Structure of Large-Scale Buildings. Cambridge: The MIT Press, 1993.
• O. Bingöl, Arkeolojik Mimaride Taş, İstanbul: Homer Yayınevi, 2004.
• S. Alaçam, İ. Karadağ, O. Z. Güzelci, “Reciprocal style and information transfer between historical Istanbul Pervititch Maps and satellite views using machine learning,” Journal of the Faculty of Architecture and Urbanism of University of Cuenca, vol.11, no.22, pp. 71-81, 2022.
• K. A. Papadopoulos, “The restoration study of the connections between the stone blocks in the steps of the temple of Apollo Epikourios,” in 5th International Conference on Structural Analysis of Historical Constructions, New Delhi, India, 2006, pp. 1389-1396.
• A. Giuffre, Letture sulla meccanica delle murature storich, Rome: Kappa, 1991.
• P. Fuentes, S. Huerta, “Geometry, Construction and Structural Analysis of the Crossed-Arch Vault of the Chapel of Villaviciosa, in the Mosque of Córdoba,” International Journal of Architectural Heritage, vol.10, no.5, pp. 589-603, 2016.
• S. Huerta, “The Analysis of Masonry Architecture: A Historical Approach,” Architectural Science Review, vol.51, no.4, pp. 297-328, 2008.
• M. A. Keller, “The early Phrygian gate at Gordion, Turkey: An investigation of dry-stone masonry in seismic regions and recommendations for stabilization,” Master Thesis, Department of Historic Preservation, University of Pennsylvania, USA, 2009.
• S. Kurugöl, S. G. Küçük, “Tarihi eserlerde demir malzeme kullanım ve uygulama teknikleri,” in 5. Tarihi Eserlerin Güçlendirilmesi ve Geleceğe Güvenle Devredilmesi Sempozyumu, Erzurum, 2015, pp. 521-536.
• İ. E. Usta, H. İ. Alpaslan, “Batı Anadolu'daki Antik Yapılarda Taş ve Taşçı İzleri,” in IV. Uluslararası Taş Kongresi, İzmir, 2017, pp. 615-637.
• Ş. Tanrıverdi, T. Çelik, A. Ural, F. K. Fırat, “Kenet Genişliğinin Yığma Taş Bloklarının Kayma Davranışı Üstündeki Etkisinin İncelenmesi,” Düzce Üniversitesi Bilim ve Teknoloji Dergisi, vol.10, pp. 1811-1825, 2022.
• T. Çelik, Ş. Tanrıverdi, A. Ural, F. K. Fırat, “Yığma Yapılarda Kullanılan Kenetlerin Yapı Davranışına Etkilerinin İncelenmesi,” Afyon Kocatepe University Journal of Sciences and Engineering, vol. 21, pp. 650-659, 2021.
• S. Uslu, “Tarihi yığma yapılarda kullanılan metal bağlantı elemanlarının deneysel metotlarda incelenmesi,” M.S. Dissertation, Aksaray University, Aksaray, Turkey, 2013.
• H. Smoljanovic, A. Nikolic, N. Zivaljic, “A finite-discrete element model for dry stone masonry structures strengthened with steel clamps and bolts,” Engineering Structures, vol.90, pp. 117–129, 2015.
• T. Karabork, Y. Kocak, “New metal connectors developed to improve the shear strength of stone masonry walls,” Structural Engineering and Mechanics, vol. 50, no.1, pp. 121–135, 2014.
• Z. Nikolić, L. Krstevska, P. Marovic, H. Smoljanović, “Shaking table test of scaled model of Protiron dry stone masonry structure,” Procedia Engineering, vol.199, pp. 3386-3391, 2017. G. Varoufakis, “The iron clamps and dowels from the Parthenon and Erechtheion,” The Journal of Historical Metallurgy Society, vol. 26, 1992.
• K. Papadopoulos, “The Restoration Study of the Connections Between the Stone Blocks in the Steps of the Temple of Apollo Epikourios,” in 5th International Conference on Structural Analysis of Historical Constructions, New Delhi, India, 2006, pp.1389-1396.
• S. Kourkoulis, E. Pasiou, “Epistyles connected with "I" connectors under pure shear,” Journal of the Serbian Society for Computational Mechanics, vol.2, pp. 81-99, 2009.
• E. E. Toumbakari, “Analysis and Interpretation of the Structural Failures of the Orthostate in the Northern Wall of the Athens Parthenon,” Strain, vol. 45, pp. 456-467, 2009.
• G. Varoufakis, “The rapid Development of Technology in making iron Clamps of three Ancient Temples in the Archaic and Classical Period,” Journal of Chemistry and Chemical Engineering, vol.6, pp. 1136-1141, 2012.
• D. Triantis, I. Stavrakas, E. Pasiou, G. Hloupis, S. Koukoulis, “Innovative Experimental Techniques in the Service of Restoration of Stone Monuments - Part II: Marble Epistyles under Shear,” Procedia Engineering, vol.109, pp. 276-284, 2015.
• Masonry. (2024, March 20). Available: http://www.ime.gr/chronos/04/en/culture/314arts_arch_masonry.html
• W. B. Dinsmoor, Ancient Athenian Building Methods, Vermont: American School of Classical Studies at Athens, 1984.
• L. F. Restrepo Velez, G. Magenes, M. C. Griffith, “Dry Stone Masonry Walls in Bending—Part I: Static Tests,” International Journal of Architectural Heritage: Conservation, Analysis, and Restoration, vol.8, no.1, pp.1-28, 2014.
• T. Bui, A. Limam, V. Sarhosis, M. HJiaj, “Discrete Element Modelling of the In-Plane and Out-Of-Plane Behavior of Dry-Joint Masonry Wall Constructions,” Engineering Structures, vol.136, pp. 277-294, 2017.
• A. Synytsia, (2017, March 15). MSPhysics 1.0.3 [Online] Available: https://sketchucation.com/forums/viewtopic.php?f=323&t=56852&start=660.
• M. J. DeJong, “Seismic Assessment Strategies for Masonry Structures,” Ph.D. dissertation, Department of Architecture, Massachusetts Institute of Technology, United States, 2009.
• D. D. Jimenez, “Empirical Analysis of Masonry Walls: Structural Design and Seismic Reinforcement through Tilting Experiments,” M.S. Dissertation, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, United States, 2011.
• I. Caliò, Ivo, M. Marletta, B. Pantò, “A Simplified Model for the Evaluation of the Seismic Behaviour of Masonry Buildings,” in The Tenth International Conference on Civil, Structural and Environmental Engineering, pp.2-17.