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Journal articles on the topic 'Strengthening beams'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Hamid, N. A. A., N. Salleh, N. Ali, et al. "Strengthening RC beams with circular post-opening in shear zone by externally bonded CFRP." IOP Conference Series: Earth and Environmental Science 1347, no. 1 (2024): 012073. http://dx.doi.org/10.1088/1755-1315/1347/1/012073.

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Abstract An installation of post-drilled openings in existing reinforced concrete (RC) beams may result in an abrupt change in the beam’s cross-sectional dimensions, which could reduce the beam’s capacity and integrity of the beam. A variety of methods have been developed to adequately reinforce the area around the opening. This study investigates the efficacy of Carbon Fibre Reinforced Polymer (CFRP) sheets for strengthening RC beams with circular post-opening at shear zones. A total of five beams measuring 150 mm width, 300 mm depth and 1550 mm length were casted and tested under four-point

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2

Tan, Kiang Hwee. "FRP Strengthening of Discontinuous Members." Advanced Materials Research 1129 (November 2015): 69–76. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.69.

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Deep beams, corbels, stepped beams, beams with openings and the like are structural members comprising discontinuous regions for which conventional flexural theory does not apply. To strengthen such members using fibre-reinforced polymer (FRP) systems, a rational approach based on strut-and-tie models (STMs) is desirable. This involves the strengthening of struts, ties and nodal zones where required. This study was carried out to illustrate the use of strut-and-tie models in FRP strengthening of reinforced concrete T-beams with a large opening created through the web. Five 3-meter long simply-

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3

Siew, Jia Ning, Qi Yan Tan, Kar Sing Lim, Jolius Gimbun, Kong Fah Tee, and Siew Choo Chin. "Effective Strengthening of RC Beams Using Bamboo-Fibre-Reinforced Polymer: A Finite-Element Analysis." Fibers 11, no. 5 (2023): 36. http://dx.doi.org/10.3390/fib11050036.

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This paper presents a finite-element model of the structural behaviour of reinforced concrete (RC) beams with and without openings externally strengthened with bamboo-fibre-reinforced composite (BFRC) plates. The simulation was performed using ABAQUS Unified FEA 2021HF8 software. The stress–strain relationship of the RC was modelled using a model code for concrete structures, whereas the concrete-damaged plasticity model was used to simulate concrete damage. The predicted crack pattern of the beams was comparable to that from experimental observations. The ultimate load-bearing capacity of RC

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4

Michałowska-Maziejuk, Dorota, Barbara Goszczyńska, and Wiesław Trąmpczyński. "Effectiveness of strengthening pre-loaded RC beams with CFRP strips in conventional and accelerated strengthening procedures." MATEC Web of Conferences 284 (2019): 06005. http://dx.doi.org/10.1051/matecconf/201928406005.

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This paper analyses the results obtained from the testing of reinforced concrete beams additionally strengthened with composite materials pressed into the concrete cover using the near-surface-mounted reinforcement (NSMR) method. The testing program comprised two series of beams with cross-sectional dimensions of 0.12 x 0.30 x 3.30 m. The series differed in the amount of longitudinal steel reinforcement, 0.51% and 1.00%. Three beams were cast in each series. One beam was assigned as the control beam, while two other beams were strengthened with carbon fibre strips. A two-component thixotropic

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5

Liu, Ming, Hua Huang, Jian Ling Hou, and Bo Quan Liu. "Experimental Study on Shear Behavior of RC Beams Strengthened with Stainless Steel Wire Mesh." Advanced Materials Research 243-249 (May 2011): 5582–88. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.5582.

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Rehabilitation of RC members with stainless steel wire mesh and permeability polymer mortar is a new method of structural strengthening with the advantages of resistance to fire, corrosion and ageing. Experiments were conducted to investigate the shear behavior of eight strengthened RC rectangular beams and one comparative RC beam. The shear mechanism of strengthened beams was analyzed, and the influences of the strengthening manners, bolts’ amount, bolts’ distance on the shear behavior of strengthened beams were discussed. The test results show that the rehabilitation greatly increase the bea

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Irmawaty, R., Fakhruddin, and Muthmainnah. "The Effect of Binder Types of Strengthening Panel for Shear Strengthening Reinforced Concrete Beams." IOP Conference Series: Earth and Environmental Science 1117, no. 1 (2022): 012017. http://dx.doi.org/10.1088/1755-1315/1117/1/012017.

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Abstract This paper presents the shear behavior, crack patterns, and failure modes of reinforced concrete beams strengthened with geopolymer and Portland cement mortar panels. The specimens were prepared in the form of geopolymer and Portland cement mortar panels with a size of 300 mm x 700 mm, each consisting of 4 pieces. The reinforced concrete beams specimen were produced with dimension of 150 mm x 300 mm x 2300 mm and static monotonic loading test was carried out. To ensure the strength of the geopolymer and concrete used is in based on the target, a compressive strength test is carried ou

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7

Mahmoud, Kamal Sh, Mohammed M. Rasheed, and Saad Kh Mohaisen. "Strengthening of I-Section Steel Beams by Prestressing Strands." Key Engineering Materials 857 (August 2020): 169–76. http://dx.doi.org/10.4028/www.scientific.net/kem.857.169.

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Six I-section steel beams had been fabricated and tested to understand the influence of prestressing strand on the load deflection behavior of steel beam. All tested beams are simply supported having the same gross sectional area with clear span (2850) mm, five beams strengthened by two low relaxation seven wire strands, while sixth beam is the reference one. The strengthening beams were subjected jacking stress equal to (1120MPa) and subdivided according to prestressing strand positions (eccentricity). From the experimental tests, it can be noted that, the load deflection curves for strengthe

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8

A. Yusof and A. L. Saleh. "Flexural Strengthening of Timber Beams Using Glass Fibre Reinforced Polymer." Electronic Journal of Structural Engineering 10 (January 1, 2010): 45–56. http://dx.doi.org/10.56748/ejse.10124.

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This research was conducted to investigate the bending behavior of timber beams strengthened with glass fibre reinforced polymer (GFRP) rods. Seven timber beams of Yellow Meranti species with the dimensions of 100 × 200 × 3000 mm were tested. One of the beams was used as a control beam (unstrengthened) while the remaining six beams were strengthened before tested to failure under four point loading. The bending behavior of the beams was studied through their load-deflection characteristics and strain distributionacross the depth of the beam upon loading and also the failure modes. The results

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9

Deng, Lang Ni, Hua Chen, and Kan Kang. "Flexural Strengthening of Reinforced Concrete Beams with Prestressed CFRP Plates." Advanced Materials Research 255-260 (May 2011): 3077–81. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.3077.

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Four medium -scale reinforced concrete beams were constructed and tested to investigate the effectiveness of external poststrengthening with prestressed carbon fiber reinforced polymer (CFRP) plates. The various variables included the strengthening method and the amount of prestressing. The experiments consisted of one control beam, one nonprestressed CFRP-bonded beam, and two prestressed CFRP-bonded beams, all the beams were subjected to four-point bending tests. In comparison to the control beam and the nonprestressed CFRP-bonded beam, the cracking load, yield load, ultimate load and stiffne

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10

Bashandy, Alaa A. "Flexural Strengthening of Reinforced Concrete Beams Using Valid Strengthening Techniques." Archives of Civil Engineering 59, no. 3 (2013): 275–93. http://dx.doi.org/10.2478/ace-2013-0015.

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Abstract This study aims to evaluate the efficiency of strengthening reinforced concrete beams using some valid strengthening materials and techniques. Using concrete layer, reinforced concrete layer and steel plates are investigated in this research. Experiments on strengthening beam samples of dimensions 100x150x1100mm are performed. Samples are divided in to three groups. Group “A” is strengthened using 2cm thickness concrete layer only (two types). Group “B” is strengthened using 2cm thickness concrete layer reinforced with meshes (steel and plastic). Group “C” is strengthened using steel

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11

Szczech, Damian, Łukasz Krawczyk, and Renata Kotynia. "Flexural strengthening of RC beams with NSM CFRP laminates." MATEC Web of Conferences 323 (2020): 01010. http://dx.doi.org/10.1051/matecconf/202032301010.

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The paper presents test results of reinforced concrete beams flexurally strengthened with Carbon Fibre Reinforced Polymer (CFRP) laminates using the Near Surface Mounted (NSM) technique. RC beams with a cross section of 200 x 400 mm were tested in four-point bending. Two RC beams were strengthened with one NSM CFRP laminate installed into the concrete cover on the bottom side of the beam. One of the beams was strengthened under the self-weight (B10.1) and the second one under initial preloading equal to 83% of the ultimate load of the reference beam (B10.1o). Failure mechanisms, cracking patte

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12

Al-Khafaji, Ayssar, and Hani Salim. "Flexural Strengthening of RC Continuous T-Beams Using CFRP." Fibers 8, no. 6 (2020): 41. http://dx.doi.org/10.3390/fib8060041.

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In this paper, experimental investigations for strengthening reinforced concrete (RC) continuous beams were performed. Eighteen T-beams were cast, twelve of which were inverted T-beams where the flange portion of the T-beam was subjected to positive flexure to represent the support region of a continuous beam. Six of the T-beams were non-inverted where the web is subjected to positive flexure. Carbon fiber reinforced polymer (CFRP) sheets with different widths were considered, and different strengthening configurations with the same area of CFRP were investigated. The use of one-layer, multipl

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13

El Battawy, Osama Megahed, Khaled Farouk El Kashif, and Hany Ahmed Abdalla. "Experimentally Comparative Study on Different Strengthening Methods of Reinforced Concrete Deep Beams." Civil Engineering Journal 5, no. 9 (2019): 1997–2006. http://dx.doi.org/10.28991/cej-2019-03091388.

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The aim of this study is to investigate the effect of strengthening reinforced concrete deep beams. An experimental study was done using six reinforced concrete deep beams have the same dimensions of 1150×800×150 mm, and subjected to mid-span concentrated load up to failure. Beams were different in the type, Location of strengthening and the ratio of reinforcement. Beams were divided into three groups. The first group included beams strengthened internally by single strut and either vertical or horizontal additional reinforcement. The second group included beams strengthened using double embed

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14

Yakymenko, Oleh, and Anastasiia Romanova. "REPAIR AND STRENGTHENING OF FLOORS ON WOODEN BEAMS." Urban development and spatial planning, no. 77 (May 24, 2021): 487–97. http://dx.doi.org/10.32347/2076-815x.2021.77.487-497.

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Methods of repair and strengthening of floors on wooden beams are investigated. The main causes of defects are analyzed. The analysis is carried out and the advantages and disadvantages of methods of repair and strengthening of overlappings on wooden beams are defined. As a result of comparison of methods the conclusion is made. In the buildings constructed to 60th years the overlapping on wooden beams with a step of 80...120 cm was usually used. It is carried out integral – from logs or bars or component – from several boards or bars established «on an edge» and connected with nails or

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15

Purba, Luki Hariando, Salomo Simanjuntak, and Bambang Supriyadi. "NUMERICAL SIMULATION OF RETROFITTING WITH EXPANSION IN SUPPORT REINFORCE CONCRETE BEAM." Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil 28, no. 2 (2023): 290–99. https://doi.org/10.32497/wahanats.v28i2.5370.

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Beam-strengthening innovations need to be developed considering the frequent occurrence of earthquakes in Indonesia to avoid structural failure. One of the innovations in strengthening existing beams is strengthening by expanding the beam support area. This research aims to determine the behavior of strengthening existing beams. The research methods used are theoretical analysis and finite element analysis. Theoretical analysis and FEA show that strengthening the P1 beam can increase the bending and shear moment capacity by more than 50%. FEA analysis shows that retrofitting of the P1 beam inc

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16

Mohammed M. Rasheed, Dr, Mr Ali F. Atshan, and Mr Kamal Sh. Mahmoud. "Flexural Behavior of Steel Beam Strengthening by Prestressing Strands." International Journal of Engineering & Technology 7, no. 4.20 (2018): 572. http://dx.doi.org/10.14419/ijet.v7i4.20.26421.

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Seven simply supported steel beams were tested to explain the effect of strengthening by external prestressing strands. All of the beams have the same steel section, clear span length and the strengthening samples which implemented by two external prestressing strands. The tested beams are divided into two categories according to existing of external prestressing strands, the first category consists of one steel beam as a reference, while, the second group deals with steel beams strengthening by external prestressing strands and consists of six steel beams divided according to the eccentricity

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17

Hieu, Nguyen Trung, and Pham Xuan Dat. "Experimental study on the effectiveness of strengthening of reinforced concrete beams with opening in shear span using CFRP sheets." Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE 18, no. 1 (2024): 1–11. http://dx.doi.org/10.31814/stce.huce2024-18(1)-01.

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In reinforced concrete beams, the opening is frequently required for the passage of utility ducts and/or pipes. The presence of such web openings leads to a reduction of the strength and stiffness of the beam. To ensurethe safety of the reinforced concrete beam, a strengthening system around the opening is necessary. This paperaims to contribute to a better understanding of the shear behavior of reinforced concrete beams with openingsin the shear span, strengthened with Carbon fiber-reinforced polymer (CFRP) sheets. The study is based on anexperimental program carried out on six beams. All bea

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18

Hawileh, R., J. A. Abdalla, and Adil K. Al-Tamimi. "Flexural Performance of Strengthened RC Beams with CFRP Laminates Subjected to Cyclic Loading." Key Engineering Materials 471-472 (February 2011): 697–702. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.697.

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Seismic retrofitting of reinforced concrete (RC) beams by means of carbon fiber reinforced polymer (CFRP) composites is one of the state-of-the-art techniques that have been widely practiced lately. Such external strengthening schemes seem to enhance both stiffness and strength of RC beams when subjected to static and cyclic loading. Extensive research investigation has been carried out for beams subjected to monotonic static loading while limited research data is available for beams subjected to cyclic loadings. Therefore, this study is initiated and its aim is to present the results of full

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19

Mahmoud, Reem Thaker, Aziz Ibrahim Abdulla, and Ammar S. Khazaal. "Behavior of Timber Beams Strengthened by Jute Fibers." Journal of advanced Sciences and Engineering Technologies 3, no. 1 (2020): 1–20. http://dx.doi.org/10.32441/jaset.03.01.01.

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The study involves strengthening timber beams by known jute fibers with various forms of strengthening and comparison the bending test results with the control beams and beams strengthened by steel plates. Twenty-two timber specimens with dimensions (70×100×1000) mm are divided into eight groups and loaded under a one-point load. The work is carried out to study the flexural and shear strengthening effects on behavior of the tested beams. Four specimens wrapped in U technique in single and double layers, along the whole length of the beam in full and strips wrapping technique, seven beams bond

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20

Sakr, Mohammed A., Ayman A. Sleemah, Tarek M. Khalifa, and Walid N. Mansour. "Behavior of RC beams strengthened in shear with ultra-high performance fiber reinforced concrete (UHPFRC)." MATEC Web of Conferences 199 (2018): 09002. http://dx.doi.org/10.1051/matecconf/201819909002.

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This paper investigates the behavior of RC beams strengthened in shear with UHPFRC. In order to ensure high quality and facilitate the strengthening process on site applications, it has been considered to apply UHPFRC as a plate pasted on concrete using epoxy. In addition to the control beam, two strengthened RC beams using prefabricated UHPFRC plates were prepared and tested. All beams had the same rectangular cross-section geometry (150mm x 300mm x 2000mm). Two different techniques were considered during the strengthening process; the first application was the addition of two 30 mm UHPFRC pl

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21

Vaněk, Tomas. "Strengthening Old Concrete Beams." Batiment International, Building Research and Practice 13, no. 2 (1985): 115–21. http://dx.doi.org/10.1080/09613218508551266.

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22

Mohammed, Mohammed J., and Adel A. Al-Azzawi. "Torsional Performance of Reinforced Concrete Beams Strengthened Using Hybrid Fibers Sifcon Jacketing." Civil and Environmental Engineering 20, no. 2 (2024): 684–98. https://doi.org/10.2478/cee-2024-0051.

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Abstract The main aim is to investigate the influence of hybrid fiber Slurry Infiltrated Fiber Concrete (SIFCON) strengthening of beams loaded under pure torsion. The volume percentage of fiber was constant at 5%. Seven beams underwent pure torsion testing after being cast., two beams were taken as a reference (The first one without torsional reinforcement and the second beam with torsional reinforcement), and five beams were strengthened by a SIFCON jacket, One beam fully jacketed, and four beams with three-side jacket. Different types of fiber (Steel, Glass, and Hybrid) used to cast SIFCON.

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23

Sudarsana, I. Ketut, I. Putu Chandra Sajana, and I. Gusti Ngurah Oka Suputra. "Applications of bolted steel plates to shear strengthening of RC beams." MATEC Web of Conferences 276 (2019): 01002. http://dx.doi.org/10.1051/matecconf/201927601002.

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Many reinforced concrete beams have been found deficiencies in shear due to lack of shear reinforcement. Few researches have been done to investigate shear strengthening of low concrete strength of RC beams using bolted steel plates. This paper presents experimental results on the behaviour of RC beams strengthening using full steel plates along the shear span fixed with bolts. Nine RC beams having dimension of 150x200x1500mm were tested to failure on simply supports with four point loadings setup. The beams were reinforced with tension rebars area of 289.8 mm2 (2D10+1D13) and transvers reinfo

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24

Maciel, Luciana P., Paulo S. B. Leão Júnior, Manoel J. M. Pereira Filho, et al. "Experimental Analysis of Shear-Strengthened RC Beams with Jute and Jute–Glass Hybrid FRPs Using the EBR Technique." Buildings 14, no. 9 (2024): 2893. http://dx.doi.org/10.3390/buildings14092893.

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The hybridisation of fibre-reinforced polymers (FRPs), particularly with the combination of natural and synthetic fibres, is a prominent option for their development. In the context of the construction industry, there is a notable gap in research on the use of jute and glass fibres for the strengthening of concrete structures. This paper presents comprehensive experimental results from tests on seven reinforced concrete (RC) beams strengthened for shear using synthetic, natural, and hybrid jute–glass FRP composites. The beams were reinforced using the externally bonded reinforcement (EBR) tech

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25

Adday, et. al., Adnan Abdullah. "Flexural behavior of CFRP-strengthened reinforced concrete beams rubberized with finely minced rubber tire." Periodicals of Engineering and Natural Sciences (PEN) 11, no. 3 (2023): 155–75. https://doi.org/10.21533/pen.v11.i3.143.

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Although using rubber to create reinforced concrete substrates has many benefits, using rubberized concrete substrates, such as beams, is still limited. Where concrete with rubber included in it starts to lose a percent-age of its mechanical qualities, such as flexural strength. Conversely, a significant portion of structural uses for strengthening reinforced concrete beams using exterior carbon fiber reinforced polymer (CFRP) sheets are for flexural strengthening. This study used externally bonded carbon fiber-reinforced polymer (CFRP) sheets to compensate for the reduction in flexural streng

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Mhawesh, Zaid A. N., A. H. Sadjad, and Wajde S. S. Alyhya. "Utilizing CFRP Sheet for Strengthening Extended Concrete Beams." E3S Web of Conferences 427 (2023): 02027. http://dx.doi.org/10.1051/e3sconf/202342702027.

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This research investigates the behavior of extended reinforced concrete beams that have been enhanced using CFRP at the extension points. Five reinforced concrete beams with measurements of 2500 mm in length, 150mm in width, and 260mm in height were built and extended in different types. The studied cases included varied CFRP strengthening schemes for the splice joints. The findings conclude that the inclusion of horizontal stirrups on the complete top of the beam produced comparable results to those of the reference beam. Additionally, the spliced beams glued at their lateral faces and streng

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CANAVAL, J. H., T. J. DA SILVA, and A. C. SANTOS. "Experimental study of RC beams strengthened for bending by reinforced grout layer and connectors." Revista IBRACON de Estruturas e Materiais 11, no. 4 (2018): 810–33. http://dx.doi.org/10.1590/s1983-41952018000400009.

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Abstract This work is based on an experimental investigation of reinforced concrete beams strengthened to flexure for wrapping applying a type of metallic connector in the bond substrate/groute. The experimental program consisted of 5 beams used for reference (without strengthening), 5 beams reinforced with surface brushed texture substrate and 5 beams with metal connectors bonded to the substrate. The beams were submitted to four-point load bending test. Initially with a partial loading, executed the strengthening and were finally tested until the break. The strengthening was made up by the i

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28

Abdulla, Aziz, Reem Mahmoud, and Ammar Khazaal. "Toughness of Timber Beams Strengthened with Jute Fibers." Tikrit Journal of Engineering Sciences 27, no. 3 (2020): 94–112. http://dx.doi.org/10.25130/tjes.27.3.11.

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This research involves investigating the toughness behavior of timber beams strengthened by jute fibers with various forms of strengthening. Ten timber specimens with dimensions (70×100×1000) mm are divided into four groups and loaded under a third point loading. The experimental program was carried out to investigate shear and flexural strengthening effects on toughness, toughness indices, ultimate loads, and the mid-span deflection of the tested beams. One beam as a control beam (un-strengthened beam), four specimens are wrapped in U technique in single and double layers along the whole leng

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29

Sevim, Barış. "Structural Strengthening Behavior of Beams using Steel Plates." International Journal of Scientific Research and Management (IJSRM) 5, no. 12 (2017): 7789–96. http://dx.doi.org/10.18535/ijsrm/v5i12.27.

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This study presents the investigation of structural response of strengthened cantilever beams using steel plates. For the purpose a rectangular section is selected and full-scaled beams are three dimensionally modeled using finite element method. The dimensions of the beams such as width, height and length are selected as 25 cm, 50 cm and 300 cm, respectively. In the study, three different beam models are included to investigate the structural response of beams. First model is called as Model-1 and it considers only a traditional RC beam. Second model is called as Model-2 and it considers rect

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Liu, Tongxu, and Jean-Philippe Charron. "Shear strengthening of concrete T-beams with lateral layers of UHPC." MATEC Web of Conferences 364 (2022): 04016. http://dx.doi.org/10.1051/matecconf/202236404016.

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Concrete T-beams are commonly used in building slab systems and bridge decks. They may require strengthening in shear when they are deteriorated or when loading requirements increased. This research project studied the shear behaviour of concrete T-beams using cast-in-place Ultra High-Performance Concrete (UHPC) layers as a lateral strengthening method avoiding beam depth modification. Three UHPC strengthened beams together with one reference reinforced concrete beam were tested in monotonic three-point bending. Parameters investigated include the thickness of UHPC layers and the presence of s

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Kadhim, Sara, and Mustafa Özakça. "Flexural performance of RC beams externally strengthened with a single-layer of basalt fiber reinforced polymer sheets." Composites and Advanced Materials 31 (January 2022): 263498332211024. http://dx.doi.org/10.1177/26349833221102471.

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Basalt Fiber Reinforced Polymer (BFRP) is an environment friendly strengthening material that can be used in several engineering applications. In this research, an experimental program was directed to investigate the BFRP strengthening adequacy of reinforced concrete beams. Eight simple-span beams were tested under the four-point bending test and were all made from the same concrete mixture. One layer of BFRP was applied on the soffit of B1, while this layer was wrapped partially along the sides of beams B2, B3, and B4 with vertical side extensions of 25, 75, and 105 mm, respectively, to evalu

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32

Pradeeba, K., and Dr A. Rajasekaran. "Flexural Strengthening of Reinforced Concrete Beams with Externally Bonded Hybrid FRP Laminate." International Journal of Recent Technology and Engineering (IJRTE) 10, no. 3 (2021): 67–70. http://dx.doi.org/10.35940/ijrte.c6422.0910321.

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This paper enumerates the effectiveness of externally bonded Hybrid Fiber Reinforced Polymers (HyFRP) laminates on reinforced concrete beams for flexural strengthening. A total of 5reinforced concrete beams of size 150 x 250 in cross section and length of 3000mm were considered in this study. All the beams were tested in four-point bending over a simple span of 2800 mm. Of the above five beams, one beam served as reference beam and the other four beams were HyFRP laminated. The variables considered in this study included thickness of HyFRP laminate and composite ratio. Adequate measurement was

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K., Pradeeba, and A.Rajasekaran. "Flexural Strengthening of Reinforced Concrete Beams with Externally Bonded Hybrid FRP Laminate." International Journal of Recent Technology and Engineering (IJRTE) 10, no. 3 (2021): 67–70. https://doi.org/10.35940/ijrte.C6422.0910321.

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This paper enumerates the effectiveness of externally bonded Hybrid Fiber Reinforced Polymers (HyFRP) laminates on reinforced concrete beams for flexural strengthening. A total of 5reinforced concrete beams of size 150 x 250 in cross section and length of 3000mm were considered in this study. All the beams were tested in four-point bending over a simple span of 2800 mm. Of the above five beams, one beam served as reference beam and the other four beams were HyFRP laminated. The variables considered in this study included thickness of HyFRP laminate and composite ratio. Adequate measurement was

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34

Amin, Muhammad Nasir, Hanif Ullah, Kaffayatullah Khan, and Mudassir Iqbal. "Load-Displacement and Stiffness Characteristics of Carbon-Fiber Reinforced Polymer (CFRP) Strengthened Reinforced Concrete Beams." Science of Advanced Materials 15, no. 7 (2023): 872–79. http://dx.doi.org/10.1166/sam.2023.4468.

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In the current study, the efficiency of the carbon-fiber reinforced polymer (CFRP) strengthening technique is experimentally applied to reinforced concrete (RC) beams. In total, four types of test beam specimens are fabricated and tested, labeled as B-1, B-2, B-3, and B-4 for controlled specimens; the beams strengthened at high-level bending-moment regions, beams strengthened at bending-moment regions with enhanced development length, and U-wrapped shear plus flexural strengthened beams, respectively. The control specimens were fabricated under-reinforced in order to exhibit ductile failure ac

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35

Önal, Mehmet Mustafa. "Strengthening Reinforced Concrete Beams with CFRP and GFRP." Advances in Materials Science and Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/967964.

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Concrete beams were strengthened by wrapping the shear edges of the beams twice at 45° in opposite directions by either carbon fiber reinforced polymer (CFRP) or glass fiber reinforced polymer (GFRP). The study included 3 CFRP wrapped beams, 3 GFRP wrapped beams, and 3 control beams, all of which were 150×250×2200 mm and manufactured with C20 concrete and S420a structural steel at the Gazi University Technical Education Faculty labs, Turkey. Samples in molds were cured by watering in the open air for 21 days. Four-point bending tests were made on the beam test specimens and the data were colle

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Abed, Riyam J., Mohammed A. Mashrei, and Ali A. Sultan. "Flexural behavior of reinforced concrete beams strengthened by carbon fiber reinforced polymer using different strengthening techniques." Advances in Structural Engineering 25, no. 2 (2021): 355–73. http://dx.doi.org/10.1177/13694332211049992.

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The externally bonded reinforcement on grooves (EBROG) method is increasingly recognized as an alternative strengthening method that can overcome the debonding problem. This study aims to experimentally investigate the effectiveness of EBROG as compared to the conventional externally bonded reinforcement (EBR) method in strengthening reinforced concrete (RC) beams. Twelve RC beams have been tested under four point load bending. One of these beams has been designated as a reference beam, seven beams have been strengthened with carbon fiber reinforced polymer (CFRP) sheets, and four beams have b

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Abed, Riyam J., Mohammed A. Mashrei, and Ali A. Sultan. "Flexural behavior of reinforced concrete beams strengthened by carbon fiber reinforced polymer using different strengthening techniques." Advances in Structural Engineering 25, no. 2 (2021): 355–73. http://dx.doi.org/10.1177/13694332211049992.

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The externally bonded reinforcement on grooves (EBROG) method is increasingly recognized as an alternative strengthening method that can overcome the debonding problem. This study aims to experimentally investigate the effectiveness of EBROG as compared to the conventional externally bonded reinforcement (EBR) method in strengthening reinforced concrete (RC) beams. Twelve RC beams have been tested under four point load bending. One of these beams has been designated as a reference beam, seven beams have been strengthened with carbon fiber reinforced polymer (CFRP) sheets, and four beams have b

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Djamaluddin, Rudy, Rita Irmawaty, Fakhruddin, and Kohei Yamaguchi. "Flexural Behavior of Repaired Reinforced Concrete Beams Due to Corrosion of Steel Reinforcement Using Grouting and FRP Sheet Strengthening." Civil Engineering Journal 10, no. 1 (2024): 222–33. http://dx.doi.org/10.28991/cej-2024-010-01-014.

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One of the common causes of damage to the concrete structures close to the sea line is corrosion on the steel reinforcement in the concrete, which may cause spalling on the concrete cover. This paper presents the results of the simulation of the corroded reinforced concrete beams, which were repaired using the grouting method and FRP strengthening. The concrete cover of the beam specimens on the tensile side was filled with grouted concrete instead of filled with normal concrete to simulate the repair of concrete spalling. Three types of beam specimens were prepared and tested under a monotoni

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Poonam.c.chavan, *1 Dr C.P.Pise 2. Prof. Y.P.Pawar2 Prof. S.S. Kadam3. "STRENGTHENING OF REINFORCED CONCRETE DEEP BEAM USING FRP WRAPPING." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 11 (2017): 347–58. https://doi.org/10.5281/zenodo.1050264.

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This paper presents the results of an experimental investigation on shear strength enhancement of reinforced concrete deep beams externally reinforced with fiber reinforced polymer (FRP) composites. A total of sixteen deep beam specimens of size 150x350mm and 700mm long were cast. Eight beams of Set-I for Glass fiber reinforced polymer (GFRP) out of eight one as control beam and seven as retrofitted using Glass fiber reinforced concrete and Eight beams of Set-II one as control beam and seven retrofitted using Carbon fiber reinforced polymer (CFRP) as an external reinforcement is used extensive

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Said, AbdulMuttalib Issa, Ali Hussein Ali Al-Ahmed, and Dhafer Mohsin Al-Fendawy. "Strengthening of Reinforced Concrete T- Section Beams Using External Post-Tensioning Technique." Journal of Engineering 21, no. 12 (2015): 139–54. http://dx.doi.org/10.31026/j.eng.2015.12.09.

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This research is carried out to investigate the externally post-tensioning technique for strengthening RC beams. In this research, four T-section RC beams having the same dimensions and material properties were casted and tested up to failure by applying two mid-third concentrated loads. Three of these beams are strengthened by using external tendons, while the remaining beam is kept without strengthening as a control beam. Two external strands of 12 mm diameter were fixed at each side of the web of the strengthened beams and located at depth of 200 mm from top fiber of the section (dps). So t

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Md.Fazla, Rabbi Anik, Mehedi Hassan Asif Md., Hannan Raha Saima, and Reza Chowdhury Dr.Sharmin. "A Comparison between Strengthened CFRP and GFRP laminated RC Beam: Finite Element Approach." Journal of Structural Engineering, its Applications and Analysis 3, no. 3 (2020): 1–16. https://doi.org/10.5281/zenodo.4289927.

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This paper represents a numerical analysis between the performance of Strengthened and Un-strengthened Reinforced concrete beams using Carbon fiber reinforced polymer (CFRP) and Glass fiber reinforced polymer (GFRP). Nowadays, the demand of strengthening or retrofitting of existing structures is increasing because of its sustainability but more challenging for engineers to apply it. FRP laminate can be used as an external reinforcement for the reintegration of RC structures and due to their high tensile strength and corrosion resistance, they are more preferable over steel plates. In particula

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Shaik, Qudhan, and P. Polu Raju. "Strengthening of Reinforced Concrete Beams Weak in Shear Using GFRP." International Journal of Engineering & Technology 7, no. 2.20 (2018): 306. http://dx.doi.org/10.14419/ijet.v7i2.20.16723.

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Due to lateral forces acting on the structure, stresses are generated in the beam which causes beam failure. To overcome those stresses in the existing structures, retrofitting is one of the techniques to increase the lateral strength. In this study, an experimental investigation was done on RC beams to check the shear behavior by comparing control RC beams with strengthened RC beams. To observe the shear behavior considered RC Beams were made weak in shear and then Retrofitted. Two sets of beams were considered, out of which, set-1 consists of three control specimens with shear reinforcement

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Sila, Ardi Azis, Rita Irmawaty, Rudi Djamaluddin, and Wihardi Tjaronge. "A Study on the Retrofitting of the Shear Capacity on Cold Joint Longitudinal RC Beams." Engineering, Technology & Applied Science Research 14, no. 5 (2024): 17357–462. http://dx.doi.org/10.48084/etasr.8622.

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Strengthening of Reinforced Concrete (RC) beams using GFRP to increase flexural capacity often fails due to premature debonding and delamination of old concrete joints and grouting. The current research introduces a method of repairing and strengthening RC beams using grouting mortar, dyna-bold anchors, and Glass composite FRP (GFRP) sheets. Dyna-bold anchors are used as shear connectors between the old concrete and the grouting. In this research, 10 RC beams measuring 150 mm × 200 mm × 3300 mm, consisting of 2 control specimens (BK), 4 GFRP strengthening beams, and 4 GFRP strengthening beams

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Ahmed, Abd ELTawab, Genidi Magdy, H. Agamy Mohamed, and Hadhood Abdeldayem. "STUDY THE PERFORMANCE OF REINFORCED CONCRETE BEAMS STRENGTHENED BY SIDE BONDED CFRP." International Journal of Civil and Structural Engineering Research 10, no. 2 (2022): 56–62. https://doi.org/10.5281/zenodo.7446322.

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<strong>Abstract:</strong> This study's primary goal is to discuss the impact of the shear strengthening of Confined concrete beams and compare with control unstrengthened specimen to show the impact of side bonded beams retrofitting externally by Cfrp. Beams are designed to show also size effect impact. Two concrete beams were casted at the laboratory with concrete dimension of 180*40*2200mm while casted concrete strength of 30 MPa with 5Φ22 Bottom Reinforcement and 3Φ16 Top Reinforcement while the web reinforcement of T8 Spaced at 150mm.beams are tested under a/d radio of 2. The

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El-Mandouh, Mahmoud A., Jong Wan Hu, Won Sup Shim, Fathi Abdelazeem, and Galal ELsamak. "Torsional Improvement of RC Beams Using Various Strengthening Systems." Buildings 12, no. 11 (2022): 1776. http://dx.doi.org/10.3390/buildings12111776.

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Many structural elements are subjected to a significant torsional moment that affects the structural design and may require strengthening. This paper presents different effective strengthening techniques to enhance the torsional capacity of reinforced concrete (RC) beams. An experimental and numerical investigation was undertaken to evaluate the efficacy of utilizing various strengthening systems. The experimental program included six full-scale RC beams with a cross-section dimension of (150 mm × 300 mm) and a length of 1500 mm, split into one beam without strengthening as a control beam, and

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Al-Nuaimi, Amer A. H., Rafa'a Mahmood Abbas, and Reem Basil Abbas. "Nonlinear Analysis on Torsional Strengthening Of Rc Beams Using Cfrp Laminates." Journal of Engineering 19, no. 9 (2023): 1102–14. http://dx.doi.org/10.31026/j.eng.2013.09.05.

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This research is devoted to investigate the behavior and performance of reinforced concrete beams strengthened with externally bonded Carbon Fiber Reinforced Polymer (CFRP) laminates under the effect of torsion. In this study a theoretical analysis has been conducted using finite element code ANSYS. Six previously tested beams are used to investigate reinforced concrete beams behaviorunder torsion, two of them are solid and the rest are box-section beams. Also, two beams are without CFRP reinforcement, which are used as control beams for the strengthened one, and the other four beams are stren

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Elkafrawy, Mohamed, Ahmed Khalil, Mohammad AlHamaydeh, Rami Hawileh, and Wael Abuzaid. "Enhancing the Shear Capacity of RC Beams with Web Openings in Shear Zones Using Pre-Stressed Fe-SMA Bars: Numerical Study." Buildings 13, no. 6 (2023): 1505. http://dx.doi.org/10.3390/buildings13061505.

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Openings in the shear span can significantly affect the structural behavior of reinforced concrete (RC) beams, particularly in terms of shear capacity and crack propagation. This paper aims to investigate the feasibility of strengthening the web opening in the shear zone of RC beams by using iron-based shape memory alloy (Fe-SMA) bars, providing valuable insights for structural engineers and researchers. Numerical analysis with ABAQUS/CAE 2020 software was employed in the current study. The research was divided into six groups of beams with web openings of different lengths (150, 300, and 450

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El Gamal, Sherif, Ali Al-Nuaimi, Abdullah Al-Saidy, and Khalid Al-Shanfari. "FLEXURAL BEHAVIOR OF RC BEAMS STRENGTHNED WITH CFRP SHEETS USING DIFFERENT STRENGTHENING TECHNIQUES." Journal of Engineering Research [TJER] 16, no. 1 (2019): 35. http://dx.doi.org/10.24200/tjer.vol16iss1pp35-43.

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Due to the advantages of Fiber Reinforced Polymer (FRP) materials, they have been utilized to strengthen several reinforced concrete (RC) elements such as slabs, beams and columns. In this paper, five RC beams (200 mm width, 300 mm height, and 2750 mm length) were constructed. Four of these beams were strengthened with CFRP sheets whereas the last beam was used as a reference. Test parameters include the amount of FRP and the strengthening technique. Three strengthening techniques were used including the externally bonded technique (EB), the near surface mounted (NSM) technique using folded CF

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May, Sebastian, and Alexander Schumann. "Investigations into the Shear Load-Capacity of Strengthened Reinforced Concrete Structures with Carbon-Reinforced Concrete." Buildings 13, no. 11 (2023): 2765. http://dx.doi.org/10.3390/buildings13112765.

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As part of the experiments, 4-point-bending tests to investigate the shear capacity of strengthened T-beams were carried out. Thereby, 5 reference beams and 25 T-beams with carbon reinforced concrete strengthening were tested. Two different impregnated carbon grids in various strengthening configurations at the beams’ webs were checked. The number of strengthening layers was varied as well as the orientation of the grid in the strengthening layer. Furthermore, the influence of pre-damage of the RC beam before strengthening and two different shear slendernesses were investigated. A load increas

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Xie, Wei, Jie Sheng, Zongjian Yu, Yan Li, and Guotao Dou. "Flexural Behavior of Corroded RC Beams Strengthened by Textile-Reinforced Concrete." Buildings 13, no. 12 (2023): 2902. http://dx.doi.org/10.3390/buildings13122902.

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The flexural behavior of corroded reinforced concrete (RC) beams strengthened with textile reinforced concrete (TRC) was analyzed and discussed in this work. Thirteen beams, including one reference beam, three corrosion-only beams, and nine TRC-strengthened corroded beams, were tested under four-point bending. The failure modes, cracks, bearing capacity, load–displacement curves and ductility of the tested beams were analyzed. The results showed that the TRC played a role in increasing the number of cracks and decreasing the width of the cracks in the corroded RC beams. In terms of improving t

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