Behavioral Study of Shear and Flexural Strength of Reinforced Concrete Beams with Interfaces of Concrete Casted Under Cyclic Loading
Keywords:Shear Strength, Flexural Strength, Concrete interfaces, Reinforced Concrete Beams
Reinforced concrete beams are designed primarily for resisting the shear and flexural stresses that are exhibits on the beam sections. These two parameters are influenced by different factors. Delay of concrete casting forms an interface between harden and fresh concretes. Interface is a surface between two sections of concrete that are not placing monolithically. This interface may affect the structural capacity of reinforced concrete members. Especially shear strength of the members at the shear plane is highly influenced by this interface. Many researches were conducted on different factors that affect the shear and flexural capacity of reinforced concrete beams varying different parameters. In this research paper, an experimental study was executed to investigate the effect of interfaces on the behavior of the shear and flexural capacity of reinforced concrete beams. Eleven beam specimens were examined through experiment. Main variables in the research were interface location (Half, one third, quarter, and one fifth) and interface configuration (vertical and inclined) for both shear and flexural beams. The test results indicate that considerable reduction in the shear capacity and relatively small reduction in flexural capacity of reinforced concrete beams due to the interfaces weakness at the joint.
. A.H.Mattock. (1976). Shear Transfer under Monotonic Loading Across and Interface between Concrete Casted at different times. University of Washington press (pp. 67-78). washington Dc: Seattle.
. A.H.Mattock, N. H. (1972). Shear Transfer in Reinforced Concrete-Recent Research. PCI Journal, 55-75.
. A.R.Moradi, M. (2015). Stress-Transfer Behavior of Reinforced Concrete Cracks and Interfaces. ACI Structural Journal, 69-80.
. Abass, Z. (2011). Effect of Construction Joints on Performance of Reinforced Concrete Beams. Al-Khwarizmi Engineering Journal, 4864.
. ASSTO. (2005). Cohesion and Friction. In AASHTO, LRFD "Bridge Design Specification''. washigton: American Association of state highway and transportation officials.
. Aziz, R. (2010). Shear Capacity of Concrete Prisms with Interface Joints. Journal of Engineering , 5084-5097.
. Bin Osman, M. T. (2016). A Comparison of Construction Joint Ability on Concrete Slab Applied at Construction Site. Journal of Engineering and Applied science , 2576-2580.
. Christopher, S. (2017). Investigation of interfaces shear transfer using push-through tests. ACI Structural Journal, 173-185.
. committee318, A. (2014). Shear transfer mechanism in ACI Building code requirements for structural concrete and commentary. washington : MI:Farmington Hills.
. J.Lee, M. (2015). Diagonal Tension Failure of Reinforced and Pres-stressed Concrete Member. ACI Stactural Journal, 311-322.
. J.Y.Kang, j. (2016). Shear Behavior in Indented Concrete Layers with Different Strengths. Engineering Journal, 423-431.
. Mohamadien, H. (2013). The impact of time when casting the layer of concrete on its mechanical properties. Journal of Engineering Science, 910-929.
. T. Paulay, A. (1974). Shear transfer by Aggregate interlock. Michigan: ACI special Publisher.
. Wight, J. a. (2012). Reinforced Concrete mechanics and design. DC: US pearson Education.
. Z. Mohammed, T. (2009). Experimental Investigation on Shear Cracking Behavior in Reinforced Concrete Beams with Shear Reinforcement. Open Civil Engineering Journal, 50-65.
How to Cite
Authors who submit papers with this journal agree to the following terms.