{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T20:50:20Z","timestamp":1792529420344,"version":"4.5.0"},"reference-count":45,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2020,11,30]],"date-time":"2020-11-30T00:00:00Z","timestamp":1606694400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010661","name":"Horizon 2020 Framework Programme","doi-asserted-by":"publisher","award":["No 730900"],"award-info":[{"award-number":["No 730900"]}],"id":[{"id":"10.13039\/100010661","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/polym12122869","type":"journal-article","created":{"date-parts":[[2020,11,30]],"date-time":"2020-11-30T20:10:22Z","timestamp":1606767022000},"page":"2869","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":39,"title":["Deformable Polyurethane Joints and Fibre Grids for Resilient Seismic Performance of Reinforced Concrete Frames with Orthoblock Brick Infills"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6384-1451","authenticated-orcid":false,"given":"Theodoros","family":"Rousakis","sequence":"first","affiliation":[{"name":"Civil Engineering, Democritus University of Thrace, 67100 Xanthi, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4853-7910","authenticated-orcid":false,"given":"Alper","family":"Ilki","sequence":"additional","affiliation":[{"name":"Civil Engineering Department, Istanbul Technical University, Istanbul 34469, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6169-5585","authenticated-orcid":false,"given":"Arkadiusz","family":"Kwiecien","sequence":"additional","affiliation":[{"name":"Faculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0615-2294","authenticated-orcid":false,"given":"Alberto","family":"Viskovic","sequence":"additional","affiliation":[{"name":"Engineering and Geological Department, Gabriele D\u2019Annunzio University of Chieti-Pescara, 65122 Pescara, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matija","family":"Gams","sequence":"additional","affiliation":[{"name":"Department of Structural and Earthquake Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Petra","family":"Triller","sequence":"additional","affiliation":[{"name":"Slovenian National Building and Civil Engineering Institute (ZAG), The Department of Structures, 1000 Ljubljana, Slovenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bahman","family":"Ghiassi","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, University of Nottingham, Nottingham NG7 2RD, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7279-8002","authenticated-orcid":false,"given":"Andrea","family":"Benedetti","sequence":"additional","affiliation":[{"name":"Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, 40126 Bologna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zoran","family":"Rakicevic","sequence":"additional","affiliation":[{"name":"Institute of Earthquake Engineering and Engineering Seismology (IZIIS), Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Camilla","family":"Colla","sequence":"additional","affiliation":[{"name":"Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, 40126 Bologna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Omer Faruk","family":"Halici","sequence":"additional","affiliation":[{"name":"Civil Engineering Department, Istanbul Technical University, Istanbul 34469, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bogus\u0142aw","family":"Zaj\u0105c","sequence":"additional","affiliation":[{"name":"Faculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4977-4715","authenticated-orcid":false,"given":"\u0141ukasz","family":"Hojdys","sequence":"additional","affiliation":[{"name":"Faculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4695-2977","authenticated-orcid":false,"given":"Piotr","family":"Krajewski","sequence":"additional","affiliation":[{"name":"Faculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fabio","family":"Rizzo","sequence":"additional","affiliation":[{"name":"Engineering and Geological Department, Gabriele D\u2019Annunzio University of Chieti-Pescara, 65122 Pescara, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vachan","family":"Vanian","sequence":"additional","affiliation":[{"name":"Civil Engineering, Democritus University of Thrace, 67100 Xanthi, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anastasios","family":"Sapalidis","sequence":"additional","affiliation":[{"name":"Civil Engineering, Democritus University of Thrace, 67100 Xanthi, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Efthimia","family":"Papadouli","sequence":"additional","affiliation":[{"name":"Civil Engineering, Democritus University of Thrace, 67100 Xanthi, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aleksandra","family":"Bogdanovic","sequence":"additional","affiliation":[{"name":"Institute of Earthquake Engineering and Engineering Seismology (IZIIS), Ss. 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