Re-evaluation of existing tests on RC connections using post-installed reinforcing bars

Mahadik, Vinay; Sharma, Akanshu; Hofmann, Jan

doi:10.1016/j.engstruct.2019.109970

Cited by 11 publications

(3 citation statements)

References 12 publications

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“…Recently, a new beam-end specimen has been proposed in [9] to evaluate the bond behavior of post-installed rebar. Mahadik et al [10] performed a numerical study to re-evaluate the existing tests on reinforced concrete (RC) connections with postinstalled rebars to explore the influence of the assumptions and boundary conditions on the original conclusions. Lee et al [11] proposed a strut and tie model to design the post-installed rebars in wallslab moment connections.…”

Section: Post-installed Reinforcement Systemsmentioning

confidence: 99%

Anchorage behavior of Fe-SMA rebars Post-Installed into concrete

Raza

Michels²,

Schranz³

et al. 2022

Engineering Structures

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Section: Post-installed Reinforcement Systemsmentioning

confidence: 99%

Anchorage behavior of Fe-SMA rebars Post-Installed into concrete

Raza

Michels²,

Schranz³

et al. 2022

Engineering Structures

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“…The bond-slip relation for the reinforcement bars was calculated using the formulation provided by Lettow (2006) [44]. Similar approaches for modeling employed for modeling RC components (also including NSD BCJ behavior) have been reported in several studies [21,36,[45][46][47][48][49][50].…”

Section: Fe Modeling Approach and Validationmentioning

confidence: 99%

Bidirectional Loading History for Seismic Testing of 3D Frame Joints

Mahadik

Sharma

2021

CivilEng

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Beam-column-joints (BCJ) in reinforced concrete (RC) frames are known to be critical against seismic actions. Hence, several researchers have conducted related investigations. The loading history used in the experimental investigations must be a sufficiently accurate and conservative representation of seismic loading on the structure and should trigger all possible critical failure mechanisms in the subassembly. Presently, there is significant diversity in the loading histories used for seismic investigation of structural subassemblies. This paper intends to propose an optimum loading history for considering bidirectional (horizontal) seismic action on 3D-RC BCJ subassemblies. To this end, the available loading histories (unidirectional and bidirectional) for simulation of seismic loads on RC joint subassemblies are reviewed in the context of the demands they impose on the joints. Finite element modeling and analyses are used as a tool for investigating the response of 3D-BCJ subassembly under different bidirectional loading states.

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“…Many scientists have investigated the mechanical and chemical behavior between adhesive bars and concrete 29 , 30 . It has been determined that the rebar with a larger diameter has higher failure in the connection with concrete, which in order to have a better connection and no brittleness, the length of the rebar should be fifteen times the diameter of the rebar 31 , 32 .…”

Section: Introductionmentioning

confidence: 99%

Achieving outstanding mechanical/bonding performances by epoxy nanocomposite as concrete–steel rebar adhesive using silane modification of nano SiO2

Ghamarpoor

Jamshidi

Mohammadpour

2023

Sci Rep

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Anchoring steel rebar in concrete structures is a common method in the building and construction industry. This research focuses on improving the mechanical/bonding properties of the prepared epoxy nanocomposite adhesive using surface treatment of SiO2 nano fillers by glycidoxypropyltrimethoxysilane (GPTMS). For this purpose, the nano silica particles were silanized via a facile sol–gel method at silane concentrations of 1, 5, 10 and 20X (i.e. X is stoichiometric silane concentration). The nanoparticles were characterized carefully by FTIR, TGA, XRD and XPS techniques. It was found that the highest GPTMS grafting ratio was obtained at silane concentration of 10X. The pure and silanized nanoparticles were added to a two-pack epoxy resin and were compared for tensile and compressive properties. It was found that surface modification of nano silica caused improvement in the strength, modulus, compressive strength and compressive modulus by 56, 81, 200 and 66% compared to the pristine epoxy adhesive and also 70, 20, 17 and 21% compared to the pure nano silica containing adhesive. It also caused 40 and 25% improvement in the pullout strength, 33 and 18% enhancement in the pullout displacement and 130 and 50% in adhesion energy compared to the pristine and raw silica-containing adhesives, respectively.

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Re-evaluation of existing tests on RC connections using post-installed reinforcing bars

Cited by 11 publications

References 12 publications

Anchorage behavior of Fe-SMA rebars Post-Installed into concrete

Anchorage behavior of Fe-SMA rebars Post-Installed into concrete

Bidirectional Loading History for Seismic Testing of 3D Frame Joints

Achieving outstanding mechanical/bonding performances by epoxy nanocomposite as concrete–steel rebar adhesive using silane modification of nano SiO2

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