Textile-reinforced mortar (TRM) versus fiber-reinforced polymers (FRP) in shear strengthening of concrete beams

Tetta, Zoi; Koutas, Lampros N.; Bournas, Dionysios A.

doi:10.1016/j.compositesb.2015.03.055

Cited by 234 publications

(93 citation statements)

References 26 publications

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“…In the case of strengthening of RC structures using TRC significant improvement in ultimate load capacity of existing structures can be achieved, while its application is simple and can be applied in any complex shape [21][22][23]. The addition of short fibers in the matrix of TRC is also studied by several researchers and found that the hybridization of short polymeric fibers with textile have positive effects on various properties of TRC-e.g., increase in ultimate tensile strength of TRC, reducing the crack width in TRC, etc.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Hybrid PVA Fiber and AR-Glass Textile Reinforced Geopolymer Composites

Shaikh

Patel

2018

Fibers

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Textile reinforced mortar or concrete, a thin cementitious composite reinforced by non-corrosive polymer textile fabric, was developed and has been researched for its role on repair and strengthening of reinforced concrete (RC) structures. Due to embedment of polymeric textile fabric inside the cementitious matrix, many researchers argued the superiority of this technology than the externally bonded fiber reinforced polymer (FRP) sheet in RC in terms of prevention of debonding of FRP and durability in fire. However, due to use of cement rich matrix the existing development of textile reinforced concrete (TRC) need to be more environmental friendly by replacing cement based binder with geopolymeric binder. This paper presents a first study on the flexural behavior of alkali resistant glass fiber textile reinforced geopolymer (TRG). In this study, two types of geopolymer binder is considered. One is fly ash based heat cured geopolymer and the other is fly ash/slag blended ambient air cured geopolymer binder. Both geopolymer types are considered in the TRG and the results are benchmarked with the current cement based TRC. The effect of short polyvinyl alcohol (PVA) fiber as hybrid reinforced with alkali-resistant (AR) glass fiber textile on the flexural behavior of above TRC and TRGs is also studied. Results show deflection hardening behavior of both TRGs with higher flexural strength in heat cured TRG and higher deflection capacity at peak load in ambient air cured TRG. The increase in PVA fiber volume fraction from 1% to 1.5% did not show any improvement in flexural strength of both TRGs although TRC showed good improvement. In the case of deflection at peak load, an opposite phenomenon is observed where the deflection at peak load in both TRGs is increased due to increase in PVA fiber volume fractions.

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Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Hybrid PVA Fiber and AR-Glass Textile Reinforced Geopolymer Composites

Shaikh

Patel

2018

Fibers

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“…Moreover, to relieve the internal staircase from its cracking, the external bonding of the two walls that are supporting it is proposed through textile-reinforced mortar (TRM). The advantages of this strengthening method over similar ones are studied extensively in Papanicolaou et al [27] and Tetta et al [28], where TRM is compared with fibre-reinforced polymer (FRP) as the strengthening material.…”

Section: Strengthening Proposalmentioning

confidence: 99%

Assessment and Rehabilitation of a Heritage Masonry Building in Piraeus, Greece

Maraveas

Andris²

2019

WIT Transactions on the Built Environment

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This paper presents the assessment, rehabilitation and strengthening of a heritage masonry structure in Piraeus, Greece. The two-storey structure was constructed around 1900 and is used as a student restaurant at the University of Piraeus. The geometry is complex for a masonry structure and, furthermore, the masonry walls have been prestressed via wrought-iron tendons. The floors are constructed with the jack-arch method, supported by steel girders. This study was particularly challenging because of uncertainties regarding the properties of the structural materials and alterations to the live loads related to the change in the use of the building. Because the building has been declared a protected monument by the Greek State, the primary concern of the suggested retrofit was the preservation of its architectural and historical value. Thus, additional issues arose in the effort to minimize interventions. Extensive numerical simulations are presented and an extended discussion is included regarding the appropriate rehabilitation and strengthening techniques in order to satisfy both the basic principles for heritage rehabilitation and the required safety level.

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“…Leading research efforts were also done, for instance, in the US (Mobasher [4]), Israel (Peled and Bentur [5], Peled et al [6]), Brazil (Fidelis et al [7], de Andrade Silva et al [8]), Greece (Papanicolaou et al [9], Triantafillou and Papanicolaou [10], Triantafillou et al [11]), and Denmark (Blanksvärd and Täljsten [12]). Further on, researchers in Italy (Colombo et al [13] and Colombo et al [14]), Spain (Escrig et al [15]), Belgium (Cauberg et al [16] and Tysmans et al [17]), France (Contamine et al [18]), UK (Tetta et al [19]), Sweden (Williams Portal et al [20,21]), Iran (Kamani et al [22]), and other countries of the world work meanwhile on the topic of TRC. To sum up all these results, a RILEM task group TC 232-TDT was founded in 2009 to report the most promising test methods and design rules for TRC (Brameshuber [23]).…”

Section: Literature Reviewmentioning

confidence: 99%

Efficient Adaptive Test Method for Textile Development Length in TRC

Ortlepp

2018

Advances in Civil Engineering

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Natural resources can be conserved if we carefully maintain the building stock and indeed extend the useful economic life of buildings. One way to achieve this is to enhance load-bearing structures by repair, restoration, or strengthening. Such upgrading often involves applying a strengthening to existing concrete elements. Over the past decade, textile-reinforced concrete (TRC), encompassing a combination of fine-grained concrete and noncorrosive multiaxial textile fabrics, has emerged as a promising novel alternative for strengthening of conventional steel-reinforced concrete (RC) structures, offering enhanced load-bearing capacity with minimal weight and stiffness change. Although TRC has been extensively researched during the last two decades, the formalization of experimental methods and design standards is still in progress. Attempts to design for good load transfer are often hindered by lack of knowledge regarding bond behaviour. For instance, there are neither standard recommendations nor proofs regarding the required development length of textile fibres in TRC for practical applications up to now. e aim of this work was to provide a test specification, which gives a direct result for the development length (required for the anchorage of a reinforcement, also referred to as "anchorage length") of textile reinforcements in fine-grained concrete-quickly and easily. e aim of this paper was to present the test specification developed in a way that it is useful for the future work of other researchers as well as for construction engineers. Some selected experimental investigations with different textile reinforcements and different bonding properties were performed with the aim of showing the applicability of the proposed adaptive test specification. e results of these tests indicated that conventional AR glass and carbon fabrics without coating required large anchoring lengths. e tests further showed that an additional application of different kinds of coating to textile fabrics greatly increased the reinforcement's resistance to pullout. is is of special interest for carbon fibres, which have a substantially higher strength than AR glass fibres and different bond behaviour; that is, carbon fibres have, by nature, larger development lengths.

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Textile-reinforced mortar (TRM) versus fiber-reinforced polymers (FRP) in shear strengthening of concrete beams

Cited by 234 publications

References 26 publications

Flexural Behavior of Hybrid PVA Fiber and AR-Glass Textile Reinforced Geopolymer Composites

Flexural Behavior of Hybrid PVA Fiber and AR-Glass Textile Reinforced Geopolymer Composites

Assessment and Rehabilitation of a Heritage Masonry Building in Piraeus, Greece

Efficient Adaptive Test Method for Textile Development Length in TRC

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