vol27no2pa6

TJES: Abdulrahman MB, Al-Jaberi LA, Hasan SS, .The Effect of Opening Size and Location on the Performance of Reinforced Concrete T-Beams under Pure Torque. Tikrit Journal of Engineering Sciences 2021; 28(1): 46- 53.

APA: Abdulrahman MB, Al-Jaberi LA, Hasan SS, . (2021). The Effect of Opening Size and Location on the Performance of Reinforced Concrete T-Beams under Pure Torque. Tikrit Journal of Engineering Sciences, 28 (1), 46- 53.

References

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[5] Abdulrahman MB, Rashid HM. Repairing of Reactive Powder Concrete T-Beams Containing Web Opening by CFRP Strips. Tikrit Journal of Engineering Sciences 2019; 26 (1): 9-19. [6] Taha Abdo1 and Rasha Mabrouk1 (2017). Effect of Web Openings on the Structural Behavior of RC Beams Subjected to Pure Torsion. MATEC Web of Conferences 120, 01007. [7] Iraqi Standard Specification No.5/1984: Portland cement [8] Iraqi Standard Specification No. 45/1984: Aggregate from Natural Sources for Concrete and Construction [9] ASTM C494-C494M/0 2105: Standard Specification for Chemical Admixtures for Concrete [10] Zararis P. and Penelis G. (1986). \\\”Reinforced Concrete T-Beams in Torsion and Bending\\\”, ACI Journal; No. 83-17. [11] Abdulrahman MB, Mahmood SM. Strength of Reinforced Reactive Powder Concrete Hollow Beams. Tikrit Journal of Engineering Sciences 2019; 26 (2):15-22 [12] Abdul-Rahman MB, Ali AA, Younus AM. Effecting of Steel Fibers and Fly Ash on the Properties of Concrete. Tikrit Journal of Engineering Sciences 2018; 25 (4): 30-36. [13] Abdulla, Aziz Ibrahim. \\\”Thermal properties of sand modified resins used for bonding CFRP to concrete substrates.\\\” International Journal of Sustainable Built Environment 2016; 5(1): 176-182.

 

Tikrit Journal of Engineering Sciences (2021) 28(1) 46- 53.

The Effect of Opening Size and Location on the Performance of Reinforced Concrete T-Beams under Pure Torque

Mazin B.. Abdulrahman *1 Layth A.. Al-Jaberi 2 Saba S.. Hasan 3

0 Civil Department / Engineering College /Tikrit University/ Tikrit, Iraq

1 Civil Department / Engineering College /Al-Mustansiriya University/ Baghdad, Iraq

* Corresponding author: dr.mazinburhan@tu.edu.iq  

DOI: http://dx.doi.org/10.25130/tjes.27.2.06

Abstract

In modern buildings, transverse openings are often used in order to pass the pipes of health services, electrical cables or air conditioning ducts and other prepuce. The presence of these openings leads to a weakening of the beam so it must work to investigate the behavior of these beams in order to know how the presence of openings affects beam resistance. In this research, the behavior of reinforced concrete T-beams with circular openings exposed to pure torsional moment is studied. The experimental program involves testing of five beams with same dimensions and reinforcements. One of them is solid beam and used as reference for comparison with other beams with an opening and the other four T- beams containing circular openings of deferent dimension(100 and 150) and location(Lc/2 and Lc/3). Practical results show that the Tbeam with circular openings of diameter (100mm) with different locations (Lc/2 and Lc/3), where Lc is the clear span of the beam, have an ultimate torsional capacity lower than that for solid beam by about (23% and 30%) respectively. The increase of the openings size causes a significant decrease in torsional capacity, where the beams with circular openings of diameter (150mm) with different locations (Lc/2 and Lc/3) have an ultimate torsional capacity lower than that for solid beam by about (56 % and 61%) respectively. Practical results show also that the presence of circular openings with diameter of 47% and 71% from the total depth increases the angle of twist significantly as compared with reference beam for the same applied torque level.

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Keywords: Circular opening Opening size Opening location T-beams Torque

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