Milad Khatib
Lebanon ISSAE-Cnam Lebanon
Published in 2021
- The Use of Shear Connectors for Enhancing the Performance of Steel–Concrete Composite Beams: Experimental and Numerical Assessment
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Shear connectorsComposite beamsShear interfaceFinite element analysis - Authors: Anas Daou, Abdul Rahman Mahayri, Yehia Daou, Oussama Baalbaki & Milad Khatib
- Journal: International Journal of Steel Structures
- Description:
- Structural steel and reinforced concrete are the main materials used in civil structures, and each has its own advantages and disadvantages. Nonetheless, when they are combined together to form a composite material, they result in tremendous advancements. There exist different devices to attain the composite action between steel and concrete among which is the shear stud connector that represents one of the most commonly used methods in composite construction, and it is the scope of this study. This monograph examines the degree of shear connection in steel–concrete composite beams depending on the properties of the shear connectors, where mild and rigid shear connectors where studied. It has been concluded via a non-linear numerical analysis backed by experimental testing that the capacity and the deformation of composite beams depend on the configuration and the mechanical properties of the shear connectors. Moreover, a simplified model to predict the degree of shear connection and the capacity of the composite beam was proposed.
Published in 2020
- Enhancement of shear strength of bonded post-tensioned beams using inverted-U shaped reinforcements
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Shear reinforcementBonded post-tensioned concrete beamsInverted-U shaped reinforcementsStirrups reinforcements - Authors: Milad Khatib, ZaherAbou Saleh
- Journal: Case Studies in Construction Materials
- Description:
- At a cracked stage, the post-tensioned concrete beams resist shear through a different set of mechanisms, the accepted mechanisms are: interface shear transfer, dowel action of longitudinal reinforcements, shear transfer in compression zone, transversal reinforcements, and vertical component of the force in the draped of prestressing strands. To increase the shear capacity in such beams, special shear reinforcements can be used. This paper presents the results of an experimental investigation on shear strength for bonded post-tensioned concrete beams (PTB) reinforced with inverted-U shaped reinforcement; those results were compared with beams provided with stirrups reinforcements. Based on ACI code, the nominal shear stress in transversal reinforcement is limited to 8 psi (0.67 (f'c^0.5) MPa), but however, it does not differentiate between the types of shear reinforcements. The results indicate that the nominal shear stress in inverted-U shaped and stirrups reinforcements are 14.4 (f'c^0.5) psi (1.2 (f'c^0.5) MPa) and 12.72 (f'c^0.5) psi (1.06 (f'c^0.5) MPa), which it gives approximately 13 % increase in shearing strength. Good correlations exist between the predicted and the actual experimental results.
ORCID
Published in 2018
- Numerical Punching Shear Analysis of Unbonded Post-Tensioned Slabs with Inverted-U Shaped
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punching shearpost-tensioned slabfinite element softwareInverted-U shaped reinforcement - Authors: Milad Khatib, Zaher Abou Saleh, Oussama Baalbaki, Yehia Temsah
- Journal: KSCE Journal of Civil Engineering
- Description:
- In order to increase the strength and deformation capacity of flat slabs, punching shear reinforcement is used as an effective solution. Several types of punching shear reinforcing systems have been developed in the past. This work aims to analyze the behavior of unbonded post-tensioned slab subjected to punching load provided with “Inverted-U Shaped Reinforcement”. By using a finite element software, the results were compared with that obtained from an experimental investigation previously done. The experimental results were also compared according to ACI provisions for punching shear strength. A good correlation was done between what was tested and the numerical results.