FE Modeling and Seismic Performance Evaluation of Hybrid SMA-Steel RC Beam-Column Joints

Rezvanisharif, Mostafa; Ketabi, Mohammad Sadegh

doi:10.1590/1679-78255272

Cited by 4 publications

(2 citation statements)

References 40 publications

(46 reference statements)

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“…In addition, they anticipated a pattern for the load-deflection relationship of RC elements subjected to in-plane normal and shear stresses [12,14,22]. In the MCFT theory, the cracked concrete is treated as an orthotropic material, and the smeared rotating crack approach is implemented to achieve compatible crack patterns with those detected in many RC members [24][25][26]. Additionally, the smeared rotating cracks are automatically redirected without any restraint to be aligned with the direction of the principal concrete compressive stress field [13,27].…”

Section: Compatibility Equilibrium and Constitutive Relationshipsmentioning

confidence: 99%

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Implementation of Modified Compression Field Theory to Simulate the Behavior of Fiber-Reinforced Polymer Shear-Strengthened Reinforced Concrete Beams under Monotonic Loading

et al. 2023

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The numerical modeling of structures is a widely preferable approach to investigate the structural behavior of RC beams since it delivers inexpensive predictions for confirming the required goals concurrently with reducing casting, testing time, and effort. Shear-strengthening of reinforced concrete (RC) beams using externally bonded (EB) fiber-reinforced polymers (FRPs) has attracted much attention due to the fact that the FRP strengthening technique has the ability to alter the distribution of stresses between the structural elements and increase the load-carrying capacity. A significant number of experimental studies have been carried out to test the monotonic behavior of FRP shear-strengthened RC beams. Conversely, limited numerical research has been performed to investigate such performance. The VecTor2 software is developed based on the modified compression field theory (MCFT) and is directed to examine the monotonic behavior of retrofitted specimens using fiber-reinforced polymer (FRP) composites. To the authors’ knowledge, the behavior of FRP shear-strengthened beams has not been explored in the literature using the MCFT modeling approach. The main objective of this study is to detect the software’s capability of predicting the experimental outcomes of FRP shear-strengthened RC beams. This research study is carried out in two stages. Initially, the numerical study involves the development of an accurate finite element model to simulate the control specimens. The quality of this model is assessed by comparing the numerical results with the experimental outcomes. In the second phase of the numerical study, the control beam model is modified to accommodate the presence of external FRP composites. The accuracy of this model is again measured by comparing its predictions with the experimental measurements. The goal of these phases is to ensure that the numerical model captures the actual behavior of the tested beams. Additionally, two distinctive modeling approaches are investigated to represent the behavior of FRP composites. The accuracy of the numerical models is verified through comparisons of numerical predictions to experimental results in terms of ultimate loading capacity, load–deflection relationships, and failure modes. It can be stated that the validated numerical model provides alternate means for evaluating the monotonic behavior of both strengthened and non-strengthened RC beams. The predicted results compare very well with the test results of the control specimens when discrete truss elements are employed for the FRP composites. Furthermore, the numerical model provides useful information on the crack patterns and failure modes.

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Section: Compatibility Equilibrium and Constitutive Relationshipsmentioning

confidence: 99%

“…Buildings 2023, 13, x FOR PEER REVIEW 8 of 24 tensile strength, is simulated by employing the Modified Bentz model[25,[35][36][37]. The tension stiffening is a significantly required feature to capture the load-deformation relationship.…”

mentioning

confidence: 99%

Implementation of Modified Compression Field Theory to Simulate the Behavior of Fiber-Reinforced Polymer Shear-Strengthened Reinforced Concrete Beams under Monotonic Loading

et al. 2023

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An improved plastic hinge relocation technique for RC beam–column joints: experimental and numerical investigations

Sharif

Ketabi

2020

Bull Earthquake Eng

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Influence of shape memory alloy on seismic behaviour of hollow-section concrete columns

Tavakol

Hajikazemi

Rajabzadeh-Safaei

et al. 2023

Proceedings of the Institution of Civil Engineers - Structures

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The influence of shape memory alloy (SMA) reinforcement on the non-linear static and dynamic responses of hollow-section concrete columns to earthquakes was investigated. The seismic performance of concrete columns reinforced with steel and with a mix of SMA and steel was compared by assessing their ductility ratios, dissipated energies, strain recovery capacities and collapse drifts. The influence of near- and far-field ground motions on the static and dynamic responses of the test columns was also investigated. To verify the results, the columns were subjected to a near-field ground motion related to an existing earthquake and the relative displacement response history was compared with experimental results. Compared with the steel-reinforced column, it was found that the use of the hybrid SMA–steel reinforcement was more effective at recovering strains and reduced the residual deflections. On the other hand, the steel-reinforced column had a greater ductility ratio and energy dissipation capacity. It is therefore important to find an optimal combination length for the two types of reinforcement in a concrete column. The results indicated that the optimum reinforcement configuration involves replacing steel with SMA at 15–20% of column height, which includes the probable plastic hinge length.

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FE Modeling and Seismic Performance Evaluation of Hybrid SMA-Steel RC Beam-Column Joints

Cited by 4 publications

References 40 publications

Implementation of Modified Compression Field Theory to Simulate the Behavior of Fiber-Reinforced Polymer Shear-Strengthened Reinforced Concrete Beams under Monotonic Loading

Implementation of Modified Compression Field Theory to Simulate the Behavior of Fiber-Reinforced Polymer Shear-Strengthened Reinforced Concrete Beams under Monotonic Loading

An improved plastic hinge relocation technique for RC beam–column joints: experimental and numerical investigations

Influence of shape memory alloy on seismic behaviour of hollow-section concrete columns

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