PSI - Issue 78

Christoph Butenweg et al. / Procedia Structural Integrity 78 (2026) 1689–1696

1696

5. Conclusions This article presents the functionality of the INODIS decoupling system for masonry infills, using the example of quasi-static cyclic tests on infilled RC frames and shaking table experiments. The tests demonstrated that the system accommodate interstory drifts of up to 2.5% without significant infill damage, while also effectively transferring out-of-plane loads. A comparative study on a reference building with six stories showed that the system enables a reduction in the required quantities of steel and concrete, leading to lower overall costs. References AIF-Projekt: Schlussbericht zu IGF-Vorhaben Nr. 20912 N „Entwicklung eines innovativen Ansatzes zur Entkopplung von Ausfachungen und nicht tragenden Trennwänden aus Mauerwerk von der Tragstruktur“, Forschungsvereinigung Ziegelindustrie e.V., Reinhardtstraße 12-16, 10117 Berlin, 2023 Bellenberg: Thermo-Plan SX10: https://www.ziegelwerk-bellenberg.de ,2025 Cavaleri L, Di Trapani F. (2014) Cyclic response of masonry infilled RC frames: Experimental results and simplified modeling. Soil Dyn Earthquake Engineering 65:224-242. http://dx.doi.org/10.1016/j.soildyn.2014.06.016 EN 1992-1-1 (2004), Eurocode 2: Design of concrete structures – Part 1-1: General rules and rules for buildings, European Committee for Standardization, 2004. EN 1998-1 (2004) Eurocode 8: Design of structures for earthquake resistance. Part 1: General rules, seismic actions and rules for buildings (EN 1998-1). CEN, Brussels, Belgium Flanagan RD, Bennett RM (1999a) In-plane behavior of structural clay tile infilled frames. J Struct Eng 125(6):590-599. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:6(590) FprEN 1998-1-2 (2025): Eurocode 8: Design of structures for earthquake resistance, Part 1-2 Buildings, CEN /TC 250 Kakaletsis DJ, Karayannis CG (2008) Influence of masonry strength and openings on infilled R/C frames under cyclic loading. J Earthq Eng 12(2):197-221. https://doi.org/10.1080/13632460701299138 Marinković M, Baballëku M, Isufi B, Blagojević N, Milićević I, Brzev S (2022) Performance of RC cast-in-place buildings during the November 26, 2019 Albania earthquake. Bull Earthquake Engineering 20:5427-5480. https://doi.org/10.1007/s10518-022-01414-y Marinković M, Butenweg C (2019) Innovative decoupling system for the seismic protection of masonry infill walls in reinforced concrete frames. Eng Struct 197:109435. https://doi.org/10.1016/j.engstruct.2019.109435 Marinković M, Butenweg C (2022) Experimental testing of decoupled masonry infills with steel anchors for out-of-plane support under combined in-plane and out-of-plane seismic loading. Construction and Building Material 318:126041. https://doi.org/10.1016/j.conbuildmat.2021.126041 Mehrabi AB, Shing PB, Schuller MP, Noland JL (1994) Performance of Masonry-Infilled R/C Frames under in-Plane Lateral Loads; Report No. CU/SR-94-6; Deptartment of Civil, Environmental, and Architectural Engineering, University of Colorado: Denver, CO, USA Mehrabi AB, Shing PB, Schuller MP, Noland JL (1996) Experimental evaluation of masonry-infilled RC frames. J Struct Eng 122(3):228-237. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:3(228) Milijaš, A., Marinković. M., Butenweg, C., Klinkel, S. (2024) Experimental investigation on the seismic performance of reinforced concrete frames with decoupled masonry infills: considering in-plane and out-of-plane load interaction effects. In: Bulletin of Earthquake Engineering, 22:7489-7546, https://doi.org/10.1007/s10518-024-02012-w Moghaddam HA (2004) Lateral load behavior of masonry infilled steel frames with repair and retrofit. ASCE J Struct Eng 130(1): 56–63. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:1(56) Morandi P, Hak S, Magenes G (2018b) Performance-based interpretation of in-plane cyclic tests on RC frames with strong masonry infills. Eng Struct 156:503–521. https://doi.org/10.1016/j.engstruct.2017.11.058 Society of Civil Engineers, Reston, Virginia Nam PH, Paolacci F, Hoang PH (2019) Seismic performance of an infilled moment-resisting steel frame during the 2016 Central Italy Earthquake. arXiv:1907.10263 https://doi.org/10.48550/arXiv.1907.10263 Romão X, Costa AA, Paupério E, Rodrigues H, Vicente R, Varum H, Costa A (2013) Field observations and interpretation of the structural performance of constructions after the 11 May 2011 Lorca earthquake. Eng Fail Anal, 34:670-692. https://doi.org/10.1016/j.engfailanal.2013.01.040 REGUPOL-INODIS: https://acoustics.regupol.com/products/range/regupol-inodis/regupol-inodis/, 2025 Stavridis A (2009) Analytical and experimental study of seismic performance of reinforced concrete frames infilled with masonry walls. Ph.D. Thesis. University of California, San Diego Stylianidis KC (2012) Experimental investigation of masonry infilled RC frames. Open Constr Build Technolog J 6(1):194-212. https://doi.org/10.2174/1874836801206010194 Tsantilis AV, Triantafillou TC (2018a) Innovative seismic isolation of masonry infills using cellular materials at the interface with the surrounding RC frames. Eng Struct 155:279-297. https://doi.org/10.1016/j.engstruct.2017.11.025 Verlato N (2017) Development of a Clay Masonry Enclosure System with deformable joints: Experimental Analysis and Numerical Modelling. PhD Thesis, University of Padova

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