Tension stiffening approach in concrete of tensioned members

Khalfallah, Salah; Guerdouh, Dahbia

doi:10.1186/2008-6695-6-2

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…The first step in elastic behavior, hardening of the zone until a planar crack forms, occurs just before the maximum principal stress (𝜎 ) is reached. It can be calculated by Equation (1) [11]: Discussed by ref. [10] in detail.…”

Section: Theoretical Approach In Tensile Behavior Of Rc Membersmentioning

confidence: 99%

“…where σ s is the average stress level in the intended part, formulated by Khalfallah and Guerdouh [11]; ε is the average strain along the surface, which is patterned and monitored by DIC; E RC is the elastic modulus of the reinforced concrete; and α is a constant value based on the concrete material and geometry presented earlier. This α value was experimentally calculated for two types of concrete and geometry [5].…”

Section: Theoretical Approach In Tensile Behavior Of Rc Membersmentioning

confidence: 99%

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Prediction of Strain in Embedded Rebars for RC Member, Application of Hybrid Learning Approach

2023

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The aim of this study was to find strains in embedded reinforcement by monitoring surface deformations. Compared with analytical methods, application of the machine learning regression technique imparts a noteworthy reduction in modeling complexity caused by the tension stiffening effect. The present research aimed to achieve a hybrid learning approach for non-contact prediction of embedded strains based on surface deformations monitored by digital image correlation (DIC). However, due to the small training dataset collected by the installed strain gauges, the input dataset was enriched by a semi-empirical equation proposed in a previous study. Therefore, the present study discussed (i) instrumentation by strain gauge and DIC as well as data acquisition and post-processing of the data, accounting for strain gradients on the concrete surface and embedded reinforcement; (ii) input dataset generation for training machine learning regression models approaching hybrid learning; (iii) data regression to predict strains in embedded reinforcement based on monitored surface deformations; and (iv) the results, validation, and post-processing responses to make the method more robust. Finally, the developed model was evaluated through numerous statistical performance measures. The results showed that the proposed method can reasonably predict strain in embedded reinforcement, providing an innovative type of sensing application with highly improved performance.

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Section: Theoretical Approach In Tensile Behavior Of Rc Membersmentioning

confidence: 99%

Section: Theoretical Approach In Tensile Behavior Of Rc Membersmentioning

confidence: 99%

Prediction of Strain in Embedded Rebars for RC Member, Application of Hybrid Learning Approach

2023

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Moment Contribution Capacity of Tendon Prestressed Partial on Concrete Beam-column Joint Interior According to Provisions ACI 318-2008 Chapter 21.5.2.5(c) Due to Cyclic Lateral Loads

Astawa

Raka²

2016

MATEC Web of Conferences

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This research designed a partial prestressed concrete beam-column with reinforced concrete interior joint, using square columns of 400/400 mm, reinforcement 6 D16 + 4D13, section beam 250/400 mm, tensile reinforcement 5 D13, compression reinforcement 3 D13 + 2 strand tendon D12,7 mm , and joint without plastic hinge, then tested in laboratory with lateral cyclic loads on peak column, static axial load 1120 kN on the centre column, to get the tendon capacity to assume positive and negative bending moments due to lateral load, according to provisions of ACI 318-2008 part 21.5.2.5 (c). Test results showed that the moment tendon contribution on beam section, in the tensile area, the positive and negative moment both on the left side or the right side column are all qualified (<25 %). In compression area, the positive moments on left and right columns are not qualified at all (> 25 %). As for the negative moment, either left or right side column are all qualified (< 25 %). Ductility, compression, and tensile ductility on drift ratio 3.50% are all qualified (>4.0). Although the contribution of positive moment capacity tendon in compression areas does not qualify, in overall, the reliability and ductility of the structure qualify.

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Behaviour of Textile‐Reinforced Concrete Beams versus Steel‐Reinforced Concrete Beams

Alrshoudi

2021

Advances in Civil Engineering

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There has been a rising interest in utilising textile reinforcement such as carbon tows in constructing concrete components to enhance the performance of conventional reinforced concrete. Textile-reinforced concrete (TRC) has been used as a construction material mostly as primary reinforcement. However, the structural performance of TRC members has not been investigated in depth. Therefore, to better understand TRC beams’ behaviour under bending load, a widespread experimental investigation was conducted. The results of tensile stress-strain, load-deflection, moment-curvature, and tension stiffening behaviours of TRC beams were associated with conventional steel-reinforced concrete (SRC) beams. In this study, the four-point bending and tensile strength tests were performed. The results revealed that, unlike the stress-strain behaviour observed in steel, textile reinforcement does not exhibit yielding strain. The flexural behaviour of TRC beams shows no similarity to that of SRC beams at postcracking formation. Besides, the moment capacity and tension stiffening of TRC beams were found 56% and 7 times higher than those of SRC beams, respectively. Therefore, in light of these results, it can be said that TRC beams behaviour differs from that of SRC beams.

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Tension stiffening approach in concrete of tensioned members

Cited by 4 publications

References 9 publications

Prediction of Strain in Embedded Rebars for RC Member, Application of Hybrid Learning Approach

Prediction of Strain in Embedded Rebars for RC Member, Application of Hybrid Learning Approach

Moment Contribution Capacity of Tendon Prestressed Partial on Concrete Beam-column Joint Interior According to Provisions ACI 318-2008 Chapter 21.5.2.5(c) Due to Cyclic Lateral Loads

Behaviour of Textile‐Reinforced Concrete Beams versus Steel‐Reinforced Concrete Beams

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