Deformable polyurethane joints and fibre grids for resilient seismic performance of reinforced concrete frames with orthoblock brick infills
Authors:
- Theodoros Rousakis,
- Alper Ilki,
- Arkadiusz Kwiecien,
- Alberto Viskovic,
- Matija Gams,
- Petra Triller,
- Bahman Ghiassi,
- Andrea Benedetti,
- Zoran Rakicevic,
- Camilla Colla,
- Omer Faruk Halici,
- Bogusław Zając,
- Łukasz Hojdys,
- Piotr Krajewski,
- Fabio Rizzo,
- Vachan Vanian,
- Anastasios Sapalidis,
- Efthimia Papadouli,
- Aleksandra Bogdanovic
Abstract
The behaviour of reinforced concrete frames with masonry wall infills is influenced a lot by the stiffness and strengthdifference 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 (orthoblockbrick)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 fibregrids to the weak masonry substrate to form FibreReinforced 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.
- Record ID
- CUT0ecff397d1f64391a3342d0a258e187a
- Publication categories
- ;
- Author
- Journal series
- Polymers, ISSN , e-ISSN 2073-4360, Biweekly
- Issue year
- 2020
- Vol
- 12
- No
- 12
- Pages
- [1-20]
- Article number
- 2869
- Other elements of collation
- fot.; tab.; wykr.; Bibliografia (na s.) - 18-20; Bibliografia (liczba pozycji) - 45; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 12, Iss. 12, Spec. Iss.
- Substantive notes
- Special Issue: Structural Reinforced Polymer Composites
- Keywords in English
- polyurethane, flexible joint, RC column, brick infill, shake table, resilience
- DOI
- DOI:10.3390/polym12122869 Opening in a new tab
- URL
- https://www.mdpi.com/2073-4360/12/12/2869 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 100
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT0ecff397d1f64391a3342d0a258e187a/
- URN
urn:pkr-prod:CUT0ecff397d1f64391a3342d0a258e187a
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.