Issue 41

S. K. Kourkoulis et alii, Frattura ed Integrità Strutturale, 41 (2017) 536-551; DOI: 10.3221/IGF-ESIS.41.64 550 that must be further studied in terms of data from additional experiments. In any case and beyond any doubt, both techniques were proven efficient tools for Structural Health Monitoring. The standardization of the respective procedure in practical field- applications related to the needs of Structural Health Monitoring of monumental structures (especially concerning the PSC technique which is up to now used only in laboratory level) seems to be the next challenging step. The advantages of the PSC technique, from the practical and aesthetical points of view (very small size of the sensors), and the relatively low cost of the respective sensors and monitoring tools, renders this effort quite reasonable. R EFERENCES [1] The restoration of the monuments of the Athenian Acropolis, 2nd ed., Ministry of culture and tourism-acropolis restoration service, dr. E. Lebidaki, Athens, (2011). [2] Angelides, S., Replacement of steel connectors by titanium alloy, The Acropolis: Problems-studies-measures to be taken, 2nd International Symposium on the Deterioration of Building Stones, Athens, Greece, (1976) 351-352. [3] Korres, M., Toganides, N., Zambas, C., Skoulikidis, Th., Study for the restoration of the Parthenon, Vol.2a, Ministry of Culture, Athens, Greece, (1989). [4] The Venice Charter, 1964. International charter for the conservation and restoration of monuments and sites, IInd International Congress of Architects and Technicians of Historic Monuments, Venice. [5] Acropolis Restoration Service, Principles and Methods. http://www.ysma.gr/en/restoration-principles-and-methods , 2011 (accessed 10/01/2017). [6] Kourkoulis, S.K.,Ganniari-Papageorgiou, E., Bending of fragmented architraves restored with bolted titanium bars: A numerical analysis, Engineering Transactions, 56(2) (2008) 95-135,. [7] Kourkoulis, S.K., Pasiou E., Epistyles connected with “I” connectors under pure shear, Journal of the Serbian Society for Computational Mechanics, 2(2) (2009) 81-99. [8] Kourkoulis, S.K., Mentzini, M., Ganniari-Papageorgiou, E., Experimental and numerical study of a fractured marble epistyle restored with layers of titanium bars, The European Physical Journal Web of Conferences, 6 (2010) 09002/1- 09002/8. [9] Kourkoulis, S.K., Ganniari-Papageorgiou, E., Mentzini, M., Dionysos marble under bending: Α contribution towards understanding the fracture of the Parthenon architraves, Engineering Geology, 115 (3-4) (2010) 246-256. [10] Kourkoulis, S.K., Mentzini, M., Ganniari-Papageorgiou, E., Restored marble epistyles under bending: Α combined experimental and numerical study, International Journal of Architectural Heritage, 7(1) (2013) 89-115. [11] Dakanali, I., 2017. Applying innovative experimental techniques for the study of the mechanical behavior of structural members of ancient monuments and numerical simulation. PhD Thesis, Supervisor: Kourkoulis, S.K., National Technical University of Athens, Greece. [12] Kourkoulis, S.K., Dakanali, I., Monitoring the mechanical response of asymmetrically fractured marble epistyles after restoring their structural integrity, Procedia Structural Integrity, 3 (2017) 316-325. [13] Grosse, C.U, Ohtsu, M., Acoustic Emission testing, Basics for research - Applications in Civil Engineering, Springer- Verlag Berlin Heidelberg, (2008). [14] Miller, RK., McIntyre, P., NDT handbook-acoustic emission testing, Columbus, OH: American Society for Nondestructive Testing, (1987). [15] Ohtsu, M., Recommendation of RILEM TC 212-ACD: acoustic emission and related NDE techniques for crack detection and damage evaluation in concrete, Materials and Structures, 43 (2010) 1187-1189. [16] Aggelis, D.G., Classification of cracking mode in concrete by acoustic emission parameters. Mechanics Research Communications, 38 (2011) 153-157. [17] Ohno, K., Ohtsu, M., Crack classification in concrete based on acoustic emission, Construction and Building Materials, 24 (2010) 2339–2346. [18] Kourkoulis, S.K., Exadaktylos G.E., Vardoulakis I., U-notched Dionysos-Pentelicon marble in three point bending: The effect of nonlinearity, anisotropy and microstructure, International Journal of Fracture, 98(3-4) (1999) 369-392. [19] Exadaktylos, G.E., Vardoulakis, I., Kourkoulis, S.K., Influence of nonlinearity and double elasticity on flexure of rock beams - I. Technical theory, International Journal of Solids and Structures, 38(22-23) (2001) 4091-4117. [20] Exadaktylos, G.E., Vardoulakis, I., Kourkoulis, S.K., Influence of nonlinearity and double elasticity on flexure of rock beams - II. Characterization of Dionysos marble, International Journal of Solids and Structures, 38(22-23) (2001) 4119-4145.