Reinforced concrete slabs strengthened with textile reinforced concrete subjected to fire
- Thin layers of textile reinforced concrete (TRC) can be used as strengthening for reinforced concrete (RC) slabs or beams to increase their foad-bearing capacity. The concrete matrix consists of a fine-grained concrete with a thickness of 8 to 15 mm. Information on the behaviour of strengthened structures subjected to fire is of particular inlerest for practical applications of this innovative construction method. A total of 7 RC slabs with Steel reinforcement were produced: 2 slabs were used as reference and 5 slabs were strengthened with three layers of textile reinforcement. Ultimate capacity of reference slabs and particular TRC strengthened slabs was determined from statie load results fom 4-point-bending tests.
Fire tests on these slabs were carried out with utilization fectors using a Standard temperature curve (ISO-834-1) for fire testing. Test loads varied between 0 % and 65 % ofuMmate load.
To detect temperatures during fire exposure thermocouples were arranged throughoutThin layers of textile reinforced concrete (TRC) can be used as strengthening for reinforced concrete (RC) slabs or beams to increase their foad-bearing capacity. The concrete matrix consists of a fine-grained concrete with a thickness of 8 to 15 mm. Information on the behaviour of strengthened structures subjected to fire is of particular inlerest for practical applications of this innovative construction method. A total of 7 RC slabs with Steel reinforcement were produced: 2 slabs were used as reference and 5 slabs were strengthened with three layers of textile reinforcement. Ultimate capacity of reference slabs and particular TRC strengthened slabs was determined from statie load results fom 4-point-bending tests.
Fire tests on these slabs were carried out with utilization fectors using a Standard temperature curve (ISO-834-1) for fire testing. Test loads varied between 0 % and 65 % ofuMmate load.
To detect temperatures during fire exposure thermocouples were arranged throughout the cross-section of the slabs. Depending on the utilization the slabs were exposed to fire for 30 minutes or for 60 minutes. In some cases bending fäilure occurred, in other cases the slabs survived. None of the specimens exhibited any visual damage or concrete spalling during fire exposure. Results of deformation measurements and residual strength measurements are presented. Even though mechanisms are not fifily understood, it is important to discuss the presumable reasons for the surprisingiy positive test results. It is presumed tbat the key mechanisms contributing to the outstanding fire resistance capability presented are: superior crack control of the TRC and load redistribution between textile and Steel reinforcement as well as the primary load transfer directly into the slabs.…
MetadatenAutor*innen: | D. Ehlig, Sascha HothanORCiD |
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Persönliche Herausgeber*innen: | E.A.B. Koenders, F. Dehn |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
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Veröffentlichungsform: | Verlagsliteratur |
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Sprache: | Englisch |
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Titel des übergeordneten Werkes (Englisch): | 2nd International RILEM workshop on concrete spalling due to fire exposure (Proceedings) |
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Jahr der Erstveröffentlichung: | 2011 |
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Verlag: | RILEM Publications |
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Jahrgang/Band: | PRO 80 |
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Erste Seite: | 419 |
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Letzte Seite: | 426 |
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Freie Schlagwörter: | Bending load; Carbon fibres; Fine-grained concrete; Fire exposure; Textile reinforced concrete |
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Veranstaltung: | 2nd International RILEM workshop on concrete spalling due to fire exposure |
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Veranstaltungsort: | Delft, The Netherlands |
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Beginndatum der Veranstaltung: | 05.10.2011 |
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Enddatum der Veranstaltung: | 07.10.2011 |
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ISBN: | 978-2-35158-118-6 |
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Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
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Datum der Freischaltung: | 19.02.2016 |
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Referierte Publikation: | Nein |
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