20.500.12556/DiRROS-16905 Deformable polyurethane joints and fibre grids for resilient seismic performance of reinforced concrete frames with orthoblock brick infills The behaviour of reinforced concrete frames with masonry wall infills is influenced a lot by the stiffness and strength difference between the frame and the infill, causing early detrimental damage to the infill or to the critical concrete columns. The paper reports the results from shake table seismic tests on a full-scale reinforced concrete (RC) frame building with modified hollow clay block (orthoblock brick) infill walls, within INMASPOL SERA Horizon 2020 project. The building received innovative resilient protection using Polyurethane Flexible Joints (PUFJs) made of polyurethane resin (PU), applied at the frame-infill interface in different schemes. Further, PUs were used for bonding of glass fibre grids to the weak masonry substrate to form Fibre Reinforced Polyurethanes (FRPUs) as an emergency repair intervention. The test results showed enhancement in the in-plane and out-of-plane infill performance under seismic excitations. The results confirmed remarkable delay of significant infill damages at very high RC frame inter-story drifts as a consequence of the use of PUFJs. Further, the PUFJ protection enabled the resilient repair of the infill even after very high inter-story drift of the structure up to 3.7%. The applied glass FRPU system efficiently protected the damaged infills against collapse under out-of-plane excitation while they restored large part of their in-plane stiffness. polyurethane flexible joint RC column brick infill shake table resilience poliuretan fleksibilni stik armiranobetonski steber opečno polnilo potresna miza odpornost true false false Molecular Diversity Preservation International Angleški jezik Slovenski jezik © 2020 by the authors. Licensee MDPI, Basel, Switzerland. Neznano 2023-09-05 08:37:14 2023-09-05 09:25:33 2023-09-06 03:35:35 0000-00-00 00:00:00 2020 0 0 Nasl. z nasl. zaslona; Opis vira z dne 18. 12. 2020; str. 1-20 no. 12 Vol. 12 Nov. 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-11-30 620.1/.2 2073-4360 10.3390/polym12122869 43446019 https://www.mdpi.com/2073-4360/12/12/2869/htm Odprti dostop 1 e40dfed7-4ba5-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22973 RAZ_Rousakis_Theodoros_2020.pdf RAZ_Rousakis_Theodoros_2020.pdf 1 FC572AC76D618BFFCB48EEB19023BAE7 8984b2ce38a66d445b6bd8f40ed513cfe0a6ee36964420261922a1cf0476595e 950491eb-4bac-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22974 Zavod za gradbeništvo Slovenije 0 0 0