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STRENGTHENING OF REINFORCED CONCRETE BEAMS UNDER TORSION

STRENGTHENING OF REINFORCED CONCRETE BEAMS UNDER TORSION

STRENGTHENING OF REINFORCED CONCRETE BEAMS UNDER TORSION ...

2011-8-14  Reinforced concrete (RC) beams may be deficient in torsional shear capacity and in need of strengthening. These deficiencies may occur for several reasons, such

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TORSIONAL STRENGTHENING OF UNDER REINFORCED

2019-4-21  The plain under-reinforced concrete (RC) beams as control beam and steel fiber reinforced concrete (RFRC) beams with varying percentage of fiber fractions were casted for experiment purpose. Steel fiber fraction added in the concrete matrix in the proportion of 0.25, 0.50, 0.75 and 1% respectively to the volume of concrete. The dimensions of beam specimens were kept as 100 mm width × 150 mm depth and 1200 mm length. The two point loading was used to apply torsional loading on beams.

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Strengthening of reinforced concrete beams subjected to ...

2015-10-10  In this paper, the possibility of using UHPFC to strengthen reinforced concrete beams under torsion is investigated. Seven specimens of concrete beams reinforced with longitudinal and transverse reinforcements. One of these beams consider as control specimen while the others was strengthened by UHPFC on four, three, and two sides.

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Torsional strengthening of reinforced concrete beams with ...

2019-4-30  Different techniques have been explored for strengthening of RC beams subjected to torsional moment. One technique includes the addition of external reinforcement to the member.

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Behavior of FRP Strengthened Reinforced Concrete Beams ...

The area of torsional strengthening however has not been as popular. This paper presents the results of an experimental investigation together with a numerical study on reinforced concrete beams subjected to torsion that are strengthened with FRP wraps in a variety of configurations.

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Strengthening of reinforced concrete beams subjected to ...

Mohammed et al. investigated the possibility of using UHPFRC to strengthen reinforced concrete beams under torsion [22]. The results revealed that UHPFRC could be used as an effective external ...

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Behavior of FRP Strengthened Reinforced Concrete Beams ...

2007-3-31  The area of torsional strengthening however has not been as popular. This paper presents the results of an experimental investigation together with a numerical study on reinforced concrete beams...

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Strengthening of RC Beams Subjected to Combined Torsion ...

2013-1-1  The beams deficient in resisting torsion can be strengthened using Fiber-Reinforced Polymer (FRP) composites. An experimental study for the improvement of the torsional resistance of reinforced concrete beams using FRP is presented in this paper. Total 14 beams of 150mm × 150mm × 1700mm are cast.

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Study of torsional behavior of reinforced concrete beams ...

2018-11-21  This paper investigates the strengthening of reinforced concrete (RC) beams for its torsional behavior using aramid fiber strips. Most of the time aramid fiber is used as an externally bonded reinforcement to increase flexural and shear strength of RC beams. An attempt is made to use it for improving torsional moment carrying capacity of RC beam. Torsional failure mostly occurs in

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TORSIONAL STRENGTHENING OF UNDER REINFORCED

2019-4-21  normal reinforced concrete beams under pure torsion. The fraction of fibers added in the concrete varies from 0% to 1% by volume of concrete, in the regular interval of 0.25%. In this aspect ratio of steel fiber is kept as 38. For present research work, crimped shaped steel fibers having length 38 mm long are used. The casting of beams has done ...

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Strengthening of reinforced concrete beams subjected to ...

2015-10-10  The proposed techniques to repair concrete members such as steel plates, fiber-reinforced polymers or concrete have important deficiencies in adherence and durability. The use of ultra high performance fiber concrete (UHPFC) can overtake effectively these problems. In this paper, the possibility of using UHPFC to strengthen reinforced concrete beams under torsion is investigated.

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Behavior of Reinforced Concrete Box Beam Strengthened

2018-1-16  Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion Shengqiang Ma1, N. Muhamad Bunnori 1,a and K. K. Choong1 1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia Abstract. The present study focuses on the torsional strengthening behavior of reinforced

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Behavior of FRP Strengthened Reinforced Concrete Beams ...

The area of torsional strengthening however has not been as popular. This paper presents the results of an experimental investigation together with a numerical study on reinforced concrete beams subjected to torsion that are strengthened with FRP wraps in a variety of configurations.

get price

Torsional behaviour of reinforced concrete beams with ...

2016-6-1  Under reinforced beams. U3N, U4N and U5N are cast to study torque-twist response of under reinforced concrete with main reinforcement (longitudinal and transverse) are lower than torsionally balanced reinforcement. Torque-twist responses of these individual beams

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Torsional strengthening of under reinforced concrete beams ...

2014-8-21  The torsional moment and angle of twist has been studied of steel fiber reinforced concrete and normal reinforced concrete beams under pure torsion. The fraction of fibers added in the concrete varies from 0% to 1% by volume of concrete, in

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Study of torsional behavior of reinforced concrete beams ...

2018-11-21  This paper investigates the strengthening of reinforced concrete (RC) beams for its torsional behavior using aramid fiber strips. Most of the time aramid fiber is used as an externally bonded reinforcement to increase flexural and shear strength of RC beams. An attempt is made to use it for improving torsional moment carrying capacity of RC beam. Torsional failure mostly occurs in

get price

Torsional Strengthening of RC Beams with Near-Surface ...

2020-3-18  The strength of reinforced concrete members can be enhanced by using the externally bonded reinforcement (EBR) and near-surface mounted (NSM) methods. However, very few studies have adopted the NSM method for torsional strengthening. Although previous studies have reported the efficacy of using epoxy-resin-bonded NSM steel bars in increasing the flexural and shear strength of RC beams

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Energy Absorption Evaluation of CFRP-Strengthened Two ...

2019-10-26  Spans Reinforced Concrete Beams under Pure Torsion Ammar N. Hanoon a, Ali A. Abdulhameed a *, Haider A. Abdulhameed b, Saad K. Mohaisen c a ... investigate the energy absorption of torsion strengthening of concrete members, especially two-span concrete beams.

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Tests and analysis of reinforced concrete beams under ...

2014-5-13  Tests and analysis of reinforced concrete beams under torsion retrofitted with FRP strips C. E. Chalioris Department of Civil Engineering, Democritus University of Thrace, Greece Abstract The aim of the present study is twofold. First, the results of an experimental investigation on the torsional response of reinforced concrete (RC) beams

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TORSIONAL STRENGTHENING OF UNDER REINFORCED

2019-4-21  normal reinforced concrete beams under pure torsion. The fraction of fibers added in the concrete varies from 0% to 1% by volume of concrete, in the regular interval of 0.25%. In this aspect ratio of steel fiber is kept as 38. For present research work, crimped shaped steel fibers having length 38 mm long are used. The casting of beams has done ...

get price

TORSIONAL STRENGTHENING OF UNDER REINFORCED CONCRETE BEAMS ...

Similar to the flexure and shear strengthening, the FRC (Fiber Reinforced Concrete) also helps RC (Reinforced Concrete) members for torsion strengthening. Fiber Reinforced ConcreteFiber reinforced concrete is defined as a composite material consisting of mixtures of cement, mortar or concrete and discontinues discrete, uniformly dispersed ...

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TORSIONAL STRENGTHENING OF UNDER REINFORCED CONCRETE BEAMS ...

The torsional moment and angle of twist has been studied of steel fiber reinforced concrete and normal reinforced concrete beams under pure torsion. The fraction of fibers added in the concrete varies from 0% to 1% by volume of concrete, in the regular interval of 0.25%. In this aspect ratio of steel fiber is

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Torsional strengthening of reinforced concrete box beams ...

Torsion of structural members and the behavior of steel fiber reinforced concrete became the area of interest of many researchers in the past and it is still newsworthy. In this study, 12 reinforced concrete (R/C) beams with Steel Fiber Reinforced Concrete (SFRC) were tested to observe the failure under torsional moments.

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Behavior of Reinforced Concrete Box Beam Strengthened

2018-1-16  Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion Shengqiang Ma1, N. Muhamad Bunnori 1,a and K. K. Choong1 1School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia Abstract. The present study focuses on the torsional strengthening behavior of reinforced

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Torsional Strengthening of RC Beams with Continuous Spiral ...

2020-2-21  The strength of reinforced concrete members can be enhanced using externally bonded reinforcement (EBR) and near surface mounted (NSM) methods. However, small number of studies has adopted the NSM method for torsional strengthening. To date, no study has examined the use of spiral NSM steel wire rope and epoxy adhesives for torsional strengthening. Therefore, this study examines

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Torsion strengthening of RC beams using CFRP (parametric ...

2016-8-30  The previous experimental work conducted by the author and others for torsion strengthening of RC beams using CFRP is extended analytically in this paper using non-linear finite element analysis. A detailed parametric study is done to quantify the effect of increasing the percentage of wrapping parts of the beam to its whole length, the number of CFRP layers, the effect of CFRP

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Analytical Study on the Torsional Behavior of Reinforced ...

The analytical model was based on the softened membrane model for torsion (SMMT) modified for fiber-reinforced polymer (FRP)-strengthened beams. As a first attempt, fully wrapped beams with fiber rupture governing the mode of failure were considered in this study.

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Strengthening RC T-Beams Subjected to Combined Torsion

2009-6-9  The objective of this study is to investigate the strengthening techniques for T-beams subjected to combined shear and torsion. Six half-scale beams—two control specimen and four strengthened beams—were constructed and tested using a specially designed test setup that subjects the beam to combined shear and torsion with different ratios.

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Cracking of reinforced concrete beams under torsion

2012-6-15  The paper deals with the cracking of reinforced concrete beams loaded with torsional moment. A theoretical approach to the calculation of oblique cracks for beams subjected to pure torsional moment and to combined torsion and shearing is presented. The ways of checking cracks in such elements, prescribed by the relevant standards are described. Experimentally determined widths of

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