Behavior of RC Beams Strengthened by CFRP and Steel Rope under Frequent Impact Load

Ali, Muataz Ibrahim; Saleh, Yaseen; Hasani, Luna Ehab Al; Khazaal, Ammar Saleem; Abdulla, Aziz Ibrahim

doi:10.32441/jaset.v1i1.74

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…Figs. (7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) present the relationship between the torque and angle of twist for beams with openings. Fig.…”

Section: Torque-angle Of Twist Responsementioning

confidence: 99%

“…Figs. (13)(14)(15)(16)(17) show the torque-twisting angle relationship for beams tested under incremental repeated loading (RI-S200-1/2), (RI-S200-1/3), and (RI-S200-1/4). It can be seen that the torsional capacity was significantly improved when the opening position was moved away from the supports by about 8% for the beam (RI-S200-1/3) and 19 % for the beam (RI-S200-1/2) compared with the beam (RI-S200-1/4).…”

Section: Torque-angle Of Twist Responsementioning

confidence: 99%

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Torsional Behavior of RC Beams with Transverse Openings Strengthened by Near Surface Mounted-Steel Wire Rope Subjected to Repeated Loading

Jasim¹,

Abdulrahman²,

Jomaa’h³

et al. 2022

Tikrit j. eng. sci.

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The presence of the openings negatively effects on the strength of the beams where they act as a weak point because of the sudden change in the cross-section of the beam, so it becomes necessary to make strengthening for the beams to resist the effect of the openings and improve the strength of the beams, especially if the beams are subjected to repeated loads because of its effect on the strength at the failure. This paper studies the effect of the openings on the beams subjected to repeated loading and determine the extent of the increase in the strength of the beams when strengthened by the NSM technique. The experimental program included casting and testing fifteen RC beams, six of them considered as a control beams (three with strengthening and three without strengthening), and nine of them having circular transverse openings in different locations and strengthened by the NSM technique. Every type of beams is tested under three different types of loads (monotonic, constant repeated load, and incremental repeated load). All of the beams have the same dimensions and same reinforcement. The results show that all the beams with transverse openings are affected by repeated loads where the ultimate torque decreases and the twist angle increases. The existence of openings has a noted effect on reducing the ultimate torque, whereas the percentage of decrease in the ultimate torsional capacity reached 43.83% at the beam where the opening location is closest to the support (at the quarter of the clear span) and subjected to constant repeated loads, and the ultimate torque is significantly improved when the opening position is moved away from the supports. Also, the existence of strengthening reduced or eliminated the influence of openings on the ultimate torque compared with related non- strengthened beams.

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“…Figs. (7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) present the relationship between the torque and angle of twist for beams with openings. Fig.…”

Section: Torque-angle Of Twist Responsementioning

confidence: 99%

Section: Torque-angle Of Twist Responsementioning

confidence: 99%

Torsional Behavior of RC Beams with Transverse Openings Strengthened by Near Surface Mounted-Steel Wire Rope Subjected to Repeated Loading

Jasim¹,

Abdulrahman²,

Jomaa’h³

et al. 2022

Tikrit j. eng. sci.

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show abstract

“…A significant improvement in different failure phases was also noticed. Moreover, steel wire rope showed a positive effect when used in combination with CFRP sheets [13]. The present study aims to conduct a comparison between strengthening by CFRP and strengthening by wire rope to explore the efficiency of the newly proposed technique.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Reinforced Concrete Beams Strengthened by CFRP and Wire Rope

Abdulla¹,

Mahasneh²,

Shaheen³

et al. 2018

J. Adv. Sci. Eng. Technol.

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The current research aims to study the effect of static loads on concrete beams strengthened by wire rope. Each beam was subjected to a central concentrated load with an average loading speed of 1 kN/min. The use of steel wire rope has been suggested as a new economical technique to strengthen and rehabilitate reinforced concrete beams, as well as to support the CFRP used in strengthening. The best results were obtained when using either CFRP and wire rope together, or wire rope on its own. It was found that strengthening by CFRP and wire rope increased the flexural strength, hardness, and toughness, and decreased the maximum deflection. Furthermore, the use of wire ropes with CFRP increased the splitting strength and prevented the concrete cover separation between CFRP and concrete. The use of wire rope is a new technique that significantly enhances the performance of concrete in flexure. Using a combination of wire ropes and CFRP, and wire rope on its own showed an increase in stiffness up to about 135.24% and 72.13%, and a reduction in ultimate deflection up to about 70.31% and 49.1%, respectively as compared with control beams. Wire ropes can be used in various forms to resist flexure, shear, and torsion stresses due to ease of formation per required shape. Moreover, its efficiency can be enhanced by increasing the rope’s diameter or reducing the spacing between the wrapped rope’s segments. This renders strengthening by wire rope a new, efficient, and economic technology. © Copyright 2018 JASET, International Scholars and Researchers Association

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The hardened characteristics of self-compacting mortar including carbon fibers and estimation results by artificial neural networks

Ali

Jamel

Ali³

2020

2ND INTERNATIONAL CONFERENCE ON MATERIALS ENGINEERING &Amp; SCIENCE (IConMEAS 2019)

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Behavior of RC Beams Strengthened by CFRP and Steel Rope under Frequent Impact Load

Cited by 4 publications

References 9 publications

Torsional Behavior of RC Beams with Transverse Openings Strengthened by Near Surface Mounted-Steel Wire Rope Subjected to Repeated Loading

Torsional Behavior of RC Beams with Transverse Openings Strengthened by Near Surface Mounted-Steel Wire Rope Subjected to Repeated Loading

Behavior of Reinforced Concrete Beams Strengthened by CFRP and Wire Rope

The hardened characteristics of self-compacting mortar including carbon fibers and estimation results by artificial neural networks

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