Non-linear Analysis of the Bond Strength Behavior on the Steel-Concrete Interface by Numerical Models and Pull-Out Tests

AbstractThis study investigated the effectiveness of several types of adhesives used in post-installed rebar connections as a bonding agent between steel reinforcement bars and old concrete under pull out test. The experimental samples were; cylindrical samples of (150 mm dia. × 300 mm high) with anchors rebar of varying diameter (12 and 16 mm), different embedded length (100 and 150) mm with different holes’ diameters. The strategy of control were cast-in-place rebar concrete specimens while other samples are post-installed rebar concrete specimens of varied chemical adhesives as bonding agents, namely KUT EPOXY ANCHOR ‘NS’ and SIKAFLOOR169. The output showed that the different adhesives yielded closed pull-out load values. It is found that the pull-out capacity (bond strength) is increased by increasing the embedded length, the diameter of the rebar and slightly with the diameter of the hole. In addition, the failure mode of post-installed rebar concrete was governed by the embedded length and the area of contact with the adhesives. On the other hand, the larger diameter of rebar favors splitting or failure of concrete due to higher strength in binder-rebar interface compare to the binder-concrete interface. The results showed that the pull-out load was increased by (26 % and 32 %) as the rebar diameter increased from 12 mm to 16 mm for KUT “NS” and SIKAFLOOR respectively. The hole diameter had slightly effect of the pull out load where the average of increment was only 6 %. Finally, the bonding strength is considerably depended on the embedded length and less affected by the type of epoxy.

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Calculation of Resistance and Non-Linear Analysis of Reinforced Concrete Beams

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.292.140 ◽

2019 ◽

Vol 292 ◽

pp. 140-145

Author(s):

Pavlina Mateckova ◽

Lucie Mynarzova ◽

Oldrich Sucharda ◽

Vlastimil Bilek

Keyword(s):

Reinforced Concrete ◽

Cross Sections ◽

Concrete Beams ◽

Numerical Models ◽

Material Model ◽

Linear Analysis ◽

Reinforced Concrete Beams ◽

Modes Of Failure ◽

Eurocode 2 ◽

Non Linear

This paper deals with analysis of set of reinforced concrete beams. Loading experiments of these beams were carried out and the results were documented and published earlier. Experiments involve several variants of spans, cross-sections and reinforcement so that various modes of failure of reinforced concrete structures are achieved. This paper compares the resistance of particular beams defined according to valid standard Eurocode 2 with non-linear analysis using advanced spatial 3D numerical models Cementitious material model based on fracture mechanics implemented in ATENA software. This paper outlines the wider evaluation of failure mode of beam and comparison of different calculations of resistance of the cross-section.

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Influence of Fiber Embedded Length on Properties of Single Fiber Pull-Out Test

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.919-921.2061 ◽

2014 ◽

Vol 919-921 ◽

pp. 2061-2070

Author(s):

Ya Fang Zhang ◽

Pei Ran Chen ◽

Hao Liu ◽

Qing Hua Wu

Keyword(s):

Bond Strength ◽

Numerical Models ◽

Polypropylene Fiber ◽

Fiber Reinforced Concrete ◽

Single Fiber ◽

Test Results ◽

Interfacial Bond ◽

Interfacial Bond Strength ◽

Pull Out ◽

Damage Process

The reinforcing and toughening effect of fiber reinforced concrete (FRC) are mainly under control of the interfacial bond strength in between of fiber and concrete, and the embedded length of fiber is one of the significant factors for interfacial bond strength. In this paper, pull-out numerical models based on single steel or polypropylene fiber have been studied with the fiber embedded length set as a variable and the influence of fiber embedded length on properties of single fiber pullout has, therefore, been analyzed. The results indicate that the longer the fiber embedded length, the larger the peak index and pull-out toughness of single fiber pull-out specimen could be reached, while the interfacial bond strength would decrease. The variation of fiber embedded length has only a little impact upon the damage process of pullout. Finally, the test results for specimen with the polypropylene fiber is more sensitive to the changes of embedded length compared those with steel fiber

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Sensitivity analysis of stress state and bond strength of fiber-reinforced polymer/concrete interface to boundary conditions in single shear pull-out test

Advances in Mechanical Engineering ◽

10.1177/1687814015585419 ◽

2015 ◽

Vol 7 (5) ◽

pp. 168781401558541 ◽

Cited By ~ 5

Author(s):

Tayyebeh Mohammadi ◽

Baolin Wan

Keyword(s):

Sensitivity Analysis ◽

Stress State ◽

Bond Strength ◽

Boundary Conditions ◽

Fiber Reinforced Polymer ◽

Polymer Concrete ◽

Pull Out ◽

Reinforced Polymer ◽

Single Shear ◽

Concrete Interface

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Determination of Concrete Cube Strength from Used Samples / Určení Krychelné Pevnosti Betonu U Použitých Zkušebních Trámců

Transactions of the VŠB - Technical University of Ostrava Civil Engineering Series ◽

10.2478/v10160-012-0033-3 ◽

2012 ◽

Vol 12 (2) ◽

pp. 186-194 ◽

Cited By ~ 2

Author(s):

Oldřich Sucharda ◽

David Mikolášek ◽

Jiří Brožovský

Keyword(s):

Compressive Strength ◽

Concrete Beams ◽

Linear Analysis ◽

Bending Tests ◽

Cube Strength ◽

Non Linear ◽

Compressive Strength Of Concrete ◽

Concrete Cube

Abstract This paper deals with the determination of compressive strength of concrete. Cubes, cylinders and re-used test beams were tested. The concrete beams were first subjected to three-point or fourpoint bending tests and then used for determination of the compressive strength of concrete. Some concrete beams were reinforced, while others had no reinforcement. Accuracy of the experiments and calculations was verified in a non-linear analysis.

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