Abstract
Besides experimental investigations related to the strengthening effects of resins to natural stone, there have been hardly any numerical simulations conducted to the effects of the conservation on the mechanical behaviour of conserved objects. In the present study a three-dimensional finite element code MASA was used to investigate the influence of the conservation procedure on the mechanical properties of the natural stone. The finite element code is based on the microplane material model. As a localization limiter the crack band method was used. A typical profile of sandstone resembling parts of a sculpture—with scaling, sandy decay and sound zones was discretized by solid finite elements. Varied were material properties, temperature distribution over the depth of the specimen, cyclic effects due to the temperature variation and geometry of the specimen. Numerical results show that as a consequence of change of material properties after conservation procedure the cracks can be generated under environmental conditions that are most likely possible in practice. This is especially true for extreme temperature gradients, for repeated temperature conditions (cyclic loading) and for complex geometries. The numerical results have been partly verified by experiments.
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References
Aboudi J (1991) Mechanics of composite materials: a unified micromechanical approach. Elsevier, Amsterdam, 328 pp
Bažant ZP, Oh B-H (1983) Crack Band Theory for Fracture of Concrete. Materials and Structures, RILEM, 93(16):155–177
Bossert J (2003) Numerische Simulation an kunstharzvollgetränkten Objekten in der Denkmalpflege – FE-Berechnungen zur thermo-mechanischen Interaktion. Diplomarbeit (not published), Universität Stuttgart, Fakultät Bauingenieurwesen, Institut für Werkstoffe im Bauwesen, 133 pp
Grassegger G (1997) Die Verwitterung von Naturstein an Bauten und Baudenkmalern. In: Naturwerkstein und Umweltschutz in der Denkmalpflege. Ebner, Ulm, pp 433–490
Ožbolt J (1999) MASA - 3D Finite element program for non-linear analysis of concrete and reinforced concrete structures. Institut für Werkstoffe im Bauwesen, Stuttgart, 48 pp
Ožbolt J, Li Y, Kožar I (2001) Microplane model for concrete with relaxed kinematic constraint. Int J Solids Struc 38:2683–2711
Yoon WH (1989) Untersuchungen der temperatur- und feuchtebedingten Spannungsverhältnisse im Bereich von Instandsetzungen bei massiven Betonbauten. Dissertation, Fakultät für Bauingenieur- und Vermessungswesen, Aachen, 226 pp
Zumbroich H (1980) Einfaches Verfahren zur Ermittlung von maximalen Wärmeeigenspannungen in mehrschichtigen Außenbauteilen. Dissertation, Fakultät für Bauingenieur- und Vermessungswesen, Aachen, 155 pp
Zienkiewicz H (1984) Methode der finiten Elemente. Hanser, München, 743 pp
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Bossert, J., Ožbolt, J. & Grassegger, G. Finite-element modelling of the conservation effects of an artificial resin on deteriorated heterogeneous sandstone in building restoration. Env Geol 46, 323–332 (2004). https://doi.org/10.1007/s00254-004-1035-y
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DOI: https://doi.org/10.1007/s00254-004-1035-y