Flexural strengthening of RC beams using textile reinforced mortar – Experimental and numerical study

Elsanadedy, Hussein M.; Almusallam, Tarek; Alsayed, Saleh H.; Al-Salloum, Yousef

doi:10.1016/j.compstruct.2012.09.053

Cited by 223 publications

(67 citation statements)

References 8 publications

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“…Jedna od dosta proučavanih i primjenjivanih tehnika pojačanja konstrukcija je upotreba FRP-a, koji se sastoje od armaturnih vlakana (staklenih, ugljičnih, aramidnih) povezanih polimernom matricom (najčešće epoksidnom smolom). Uz brojne prednosti koje ovaj tip kompozita ima, postoje nedostaci koji se najviše vežu uz svojstva matrice: loše ponašanje epoksida pri visokim temperaturama, nemogućnost nanošenja smola pri niskim temperaturama i na mokrim podlogama, manjak paropropusnosti, nekompatibilnost epoksida i podloga na koje se nanosi, visoka cijena epoksida te, kao glavni nedostatak, linearno elastično ponašanje takvih kompozita do sloma [1]. Zamjena organskog veziva anorganskim (npr.…”

Section: Uvodunclassified

Textile reinforced mortars (TRM) as strengthening technique for reinforced concrete structures

Carić¹

2017

Zajednički Temelji 2017 - Peti Skup Mladih Istraživača Iz Područja Građevinarstva I Srodnih Tehničkih Znanosti - Zbornik Radova

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SažetakPosljednjih se godina za pojačanja konstrukcija istražuju tkaninom armirani mortovi (TRM). To su kompoziti koji se sastoje od vlakana (staklenih, ugljičnih, bazaltnih, PBO) i anorganske (cementne) matrice. Nastali su iz potrebe za rješavanjem nedostataka epoksidne matrice kod vlaknima armiranih polimera (FRP-a). Anorganska matrica ima veći toplinski kapacitet, a ponašanje elementa u vlaku nije linearno elastično. Snopovi vlakana su formirani u mreže kako bi se ostvarila povezanost s matricom. Provedeno je više istraživanja pojačanja armiranobetonskih i zidanih konstrukcija, a u ovom radu prikazana su pojačanja armiranobetonskih (AB) ploča, greda i stupova. Istaknuti su parametri koji utječu na učinkovitost kompozitnog djelovanja, a time i učinkovitost pojačanja te ponašanje pojačanih elemenata. Ključne riječi: TRM, pojačanja, AB, vlakna, mort, tkanina Textile reinforced mortars (TRM) as strengthening technique for reinforced concrete structures AbstractIn the last years, textile reinforced mortars (TRM) have been studied for the strengthening of structures. TRM are composites made of fibres (glass, carbon, basalt, PBO) embedded in inorganic (cementitious) matrix. They have been developed due to fibre reinforced polymers (FRP) epoxy matrix´s disadvantages. Inorganic matrix has higher thermal capacity and tensile behavior of material is non linear elastic. Fibre rovings form fabric grids in order to achieve the bond with the matrix through penetration of mortar through the fabric. Several studies have been carried out on the strengthening of reinforced concrete and masonry structures. Strengthening of reinforced concrete (RC) slabs, beams and columns is presented in this paper. Parameters that affect the effectiveness of composite action, and thus the effectiveness of strengthened elements are highlighted.

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Section: Uvodunclassified

Textile reinforced mortars (TRM) as strengthening technique for reinforced concrete structures

Carić¹

2017

Zajednički Temelji 2017 - Peti Skup Mladih Istraživača Iz Područja Građevinarstva I Srodnih Tehničkih Znanosti - Zbornik Radova

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“…Conversely, the numerical analysis of reinforced concrete elements strengthened with TRM has received significant attention. In this line, some authors have dealt with numerical modelling TRM-strengthened reinforced concrete beams subjected to flexural loading conditions [14,15], other have been focused on the shear strengthening [16] or on the numerical analysis of particular construction elements made of reinforced concrete like slabs [17] or beam-columns joints [18]. To some extent, the modelling of TRM reinforced concrete can be considered as a reference case and may provide some insight at modelling TRM reinforced masonry structures.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the load-bearing capacity of brick masonry walls strengthened with textile reinforced mortar and subjected to eccentric compressive loading

Bernat-Masó

Roca

2015

Engineering Structures

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A numerical model has been implemented to simulate brick masonry walls strengthened with Textile Reinforced Mortar (TRM) and subjected to second order bending effects in order to cover the limited research in this area. Simulations have been compared with experimental cases and applied to enhance the knowledge about the influence of different strengthening variables. The model is accurate at predicting the load-bearing capacity of the walls, which might be increased by strengthening both sides. Moreover, the TRM is more effective for the most slender cases and the numerical results suggest future improvements to reproduce the wall's stiffness.

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“…Despite these many advantages, FRP strengthening material attached to the exterior of the structure by the epoxy resin is prone to damage by fire and ultraviolet radiation [9]. Additionally, epoxy used as adhesive has the following limitations: (1) difficult to control quality in wet condition, difficult to harden at low temperatures in winter, and very low fire resistance due to the lower glass transition temperatures and (2) due to the epoxy resin matrix kept the moisture at interface between the concrete surface and the epoxy resin matrix, the strengthening material might be debonded from the concrete surface [3,10].…”

Section: Introductionmentioning

confidence: 99%

“…ese deteriorated structures can recover their load bearing capacity through strengthening [2,3]. Strengthening methods are largely divided into enlargement of concrete section, externally bonded reinforcement (EBR), and near-surface mounted reinforcement (NSMR) [4].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of RC Slabs Strengthened in Flexure with Basalt Fabric-Reinforced Cementitious Matrix

Lee

Hong

Yeon

et al. 2018

Advances in Materials Science and Engineering

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is paper presents both experimental and analytical research results for predicting the flexural capacity of reinforced concrete (RC) slabs strengthened in flexure with basalt fabric-reinforced cementitious matrix (FRCM). A total of 13 specimens were fabricated to evaluate the flexural behavior of RC slabs strengthened with basalt FRCM composite and were tested under fourpoint loading.e fiber type, tensile reinforcement ratio, and the number of fabric layers were chosen as experimental variables. e maximum load of FRCM-strengthened specimens increased from 11.2% to 98.2% relative to the reference specimens. e energy ratio and ductility of the FRCM-strengthened specimens decreased with the higher amount of fabric and tensile reinforcement. e effective stress level of FRCM fabric can be accurately predicted by a bond strength of ACI 549 and Jung's model.

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Flexural strengthening of RC beams using textile reinforced mortar – Experimental and numerical study

Cited by 223 publications

References 8 publications

Textile reinforced mortars (TRM) as strengthening technique for reinforced concrete structures

Textile reinforced mortars (TRM) as strengthening technique for reinforced concrete structures

Numerical analysis of the load-bearing capacity of brick masonry walls strengthened with textile reinforced mortar and subjected to eccentric compressive loading

Flexural Behavior of RC Slabs Strengthened in Flexure with Basalt Fabric-Reinforced Cementitious Matrix

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