Fire Behavior of Thin CFRP Pretensioned High-Strength Concrete Slabs

Terrasi, Giovanni P.; Bisby, Luke; Barbezat, Michel; Affolter, Christian; Hugi, Erich

doi:10.1061/(asce)cc.1943-5614.0000271

Cited by 34 publications

(76 citation statements)

References 3 publications

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“…The latter is determined by the serviceability issue of fully prestressing the element for service loads. Furthermore, the anchorage of the highly prestressed CFRP wires must be carefully verified (Terrasi, 2001(Terrasi, , 2012). …”

Section: Conclusion and Design Recommendationsmentioning

confidence: 99%

“…After failure, pullout continued at a constant rate, and a remnant bond strength capacity of 4 MPa was measured. These bond strength values are lower than the corresponding steel wire bond strengths, but they are high enough to guarantee a stable prestress transfer (Terrasi, 2001) (Terrasi, 2012) and the full anchorage of the CFRP wires in a HPC element loaded in flexure (Terrasi, 1998) (Terrasi & Lees, 2004). Figure 1.…”

Section: Introduction and Materials: Why Use Cfrp Prestressed Hpc Elementioning

confidence: 98%

“…Typically, a very precisely batched fine-grain concrete (mortar) is used with high strength aggregates. The cement content is around 450 kg/m 3 , micro silica and high-performance plasticizer are essential components of these concretes which have a water/cement factor of 0.32-0.39 for optimum workability (Terrasi, 2012). C90 to C100 high-performance concretes are relatively inexpensive (with material costs around 125 €/m 3 ) but have high durability, high tensile bending strength (with fractiles over 5 MPa), a relatively high modulus of elasticity (around 40 GPa depending on the aggregates) as well as the high compressive cube strength over 90 MPa (Walraven, 1995).…”

Section: Introduction and Materials: Why Use Cfrp Prestressed Hpc Elementioning

confidence: 99%

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Prefabricated Thin-walled Structural Elements Made from High Performance Concrete Prestressed with CFRP Wires

Terrasi¹

2012

JMSR

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The innovative combination of prestressed carbon fibre reinforced plastic (CFRP) wires and high performance concrete (HPC) opens up promising possibilities in the design of structural elements and load-bearing structures. This enables manufacturing of thin-walled, lightweight, filigree, fatigue resistant and very durable concrete elements with very low raw-material consumption for use in several market niches of the construction industry. Two or more of these advantages should simultaneously apply to the intended application for justifying the higher material costs of prestressing and passive CFRP reinforcements in comparison to prestressing and reinforcing steel. Significant economic benefits are to be found in the areas of maintenance of the load-bearing elements as well as their transport and installation. Recently, a first commercial breakthrough of this novel technique was achieved in the structural and architectural field with the realisation of two large building façades in Zurich, Switzerland using a total of 3000 m prestressed self compacting concrete profiles. In this paper design and experimental validation details as well as several field projects are described.

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Section: Conclusion and Design Recommendationsmentioning

confidence: 99%

Section: Introduction and Materials: Why Use Cfrp Prestressed Hpc Elementioning

confidence: 98%

Section: Introduction and Materials: Why Use Cfrp Prestressed Hpc Elementioning

confidence: 99%

See 1 more Smart Citation

Prefabricated Thin-walled Structural Elements Made from High Performance Concrete Prestressed with CFRP Wires

Terrasi¹

2012

JMSR

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“…During the initial stages of the wider study (during 2009-2010), a series of full-scale thin-walled CFRP HPSCC pretensioned slabs, produced by SACAC AG, Switzerland, were tested at EMPA, Switzerland in a standard fire resistance furnace [18]. The HPSCC mixture was designed to achieve a strength class C90.…”

Section: Wider Study On High-performance Precast Concrete Elementsmentioning

confidence: 99%

“…The 5.4 mm diameter CFRP tendons were located at the mid-plane of the slabs in order to obtain a central prestress, and were stressed to either 800 or 1200 MPa. Full details of this prior work are given elsewhere [18]. From the analysis of the fire tests on 30 slabs it was concluded that: (1) the fire resistance of the slabs was mainly limited by heat-induced spalling of the HPSCC; and (2) spalling mainly occurred around the prestress transfer zone where the precompressive stress at the heated face was greatest.…”

Section: Wider Study On High-performance Precast Concrete Elementsmentioning

confidence: 99%

Effects of polypropylene fibre type on occurrence of heat-induced concrete spalling

Maluk

Bisby

Terrasi

2013

MATEC Web of Conferences

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Abstract. This paper presents the results of an experimental study into the effects of including different types (cross section, diameter, length and supplier) and dosages of polypropylene (PP) fibres on the occurrence of heat-induced concrete spalling. A new fire testing methodology named the Heat-Transfer Rate Inducing System (H-TRIS) was developed and used in an attempt to tackle some of the shortcomings of standard furnace fire testing in the practical study of heat-induced concrete spalling.

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Kopfbolzenverankerungen in mit CFK‐Bewehrung vorgespannten dünnwandigen Hochleistungsbetonfertigteilen

Ebschner

Kautzsch

Lämmlein

et al. 2021

Beton und Stahlbetonbau

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Ein Betonfertigteilprodukt mit dem Namen Carbolith© wird von Sacac, einem Hersteller für Betonfertigteile und Schleuderbetonmaste, in der Schweiz hergestellt. Es handelt sich um mit kohlenstofffaserverstärkten Kunststoffen (CFK) bewehrte, vorgespannte Hochleistungsbetonfertigteile (HPSCC). Die Ursprünge dieser Entwicklung gehen auf Mitte der 1990er Jahre zurück [1]. Neben dem Mastbau erschloss sich im Fassadenbau ein weiteres Anwendungsgebiet [2]. Neben gestalterischen Gründen bestand der Wunsch, leichtere und dauerhaft korrosionswiderstandsfähige Bauteile einzusetzen. In nachfolgenden Forschungsprojekten wurden gezielt Fragestellungen nach einer Materialoptimierung (Betonrezeptur, Matrixzusammensetzung, Oberflächenbeschaffenheit der CFK‐Spannbewehrung), der Vorspanntechnologie und deren Lasteinleitung (Keiloptimierung), einer Erhöhung des Vorspanngrads und dem Verhalten unter Brandbeanspruchung nachgegangen [3]. In den Jahren 2012–2015 wurde das Thema der Lasteinleitung in dünnwandige, mit Carbon vorgespannten HPSCC‐Profile an der Empa bearbeitet, weil es während der Projektierung stets einiger Improvisation und ingenieurmäßigen Geschicks bedurfte. Es gab weder zuverlässig anwendbare Bemessungsnormen, noch waren für die Lasteinleitung zugelassene Verankerungsprodukte verfügbar. Im folgenden Artikel wird über experimentelle Arbeiten berichtet, die dem Einsatz von Kopfbolzendübeln als Verankerungsmittel in Verbindung mit durch Carbon vorgespannten HPSCC‐Profilen dienen sollen.

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Fire Behavior of Thin CFRP Pretensioned High-Strength Concrete Slabs

Cited by 34 publications

References 3 publications

Prefabricated Thin-walled Structural Elements Made from High Performance Concrete Prestressed with CFRP Wires

Prefabricated Thin-walled Structural Elements Made from High Performance Concrete Prestressed with CFRP Wires

Effects of polypropylene fibre type on occurrence of heat-induced concrete spalling

Kopfbolzenverankerungen in mit CFK‐Bewehrung vorgespannten dünnwandigen Hochleistungsbetonfertigteilen

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